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Search Results (1,496)

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12 pages, 727 KB  
Article
Risk of Menstrual Dysfunction, Low Energy Availability, Eating Disorders and Injury in the First All-Female UK Military Team Rowing 3000 Miles Across the Atlantic
by Solène Chaléat, David Baud, Helton De Sa Souza, Imogen O’Brien, Rebecca Glover, George Morris, Kelly Kaulback and Volker Scheer
Sports 2026, 14(6), 256; https://doi.org/10.3390/sports14060256 - 22 Jun 2026
Viewed by 133
Abstract
Data on menstrual health, energy availability, and injury risk in women undertaking extreme ultra-endurance expeditions remain limited. We conducted a prospective cohort study of the first all-female UK military team competing in a 3000-mile transatlantic rowing race, aiming to characterize menstrual function, low [...] Read more.
Data on menstrual health, energy availability, and injury risk in women undertaking extreme ultra-endurance expeditions remain limited. We conducted a prospective cohort study of the first all-female UK military team competing in a 3000-mile transatlantic rowing race, aiming to characterize menstrual function, low energy availability (LEA) risk, eating disorder (ED) risk, and injury profiles. Four female British Army personnel completed the 46-day race. Menstrual symptoms, injuries, and illnesses were recorded daily, while reproductive, inflammatory, biochemical, and hematological markers were assessed before and after the race. LEA and ED risk were evaluated using the Low Energy Availability in Females Questionnaire and Brief Eating Disorder in Athletes Questionnaire, respectively. Analyses were primarily descriptive. Three athletes experienced amenorrhea during the expedition, including one with previously regular cycles. The fourth reported intermittent abnormal bleeding associated with injury and illness and screened positive for LEA risk before and after the race. Another athlete screened positive for ED risk at both time points. Most biomarkers remained stable post-race, whereas reproductive hormones showed consistent reductions in follicle-stimulating hormone and luteinizing hormone in all four participants, alongside increased oestradiol. These findings, based on a sample of four athletes, suggest that menstrual function may be sensitive to sustained physiological stress in extreme ultra-endurance settings, and support prospective monitoring in female ultra-endurance, military, and expeditionary populations. Full article
(This article belongs to the Special Issue Women's Special Issue Series: Sports)
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17 pages, 8255 KB  
Article
Global Postural Re-Education Versus Deep Neck Flexor Activation on Chronic Nonspecific Neck Pain with Forward Head Posture
by Huda B. Abd Elhamed, Esraa Ahmed Mohamed Ahmed, Enas Fawzy Youssif, Amr M. Yehia, Mohamed A. Abdel Ghafar, Safaa M. Elkholi and Shahesta Ahmed Osama
J. Clin. Med. 2026, 15(12), 4833; https://doi.org/10.3390/jcm15124833 - 22 Jun 2026
Viewed by 179
Abstract
Background and Objectives: Chronic nonspecific neck pain (NSNP) is among the most common musculoskeletal disorders. Global postural re-education (GPR) might be effective in decreasing neck pain (NP) and dysfunction and improving forward head posture (FHP) by recovering muscle chains and reducing postural [...] Read more.
Background and Objectives: Chronic nonspecific neck pain (NSNP) is among the most common musculoskeletal disorders. Global postural re-education (GPR) might be effective in decreasing neck pain (NP) and dysfunction and improving forward head posture (FHP) by recovering muscle chains and reducing postural alteration. Deep neck flexor activation (DNF) might also decrease NP and improve FHP by improving DNF endurance. This study aimed to compare the effects of GPR versus DNF activation on pain, dysfunction, FHP, and DNF endurance. Materials and Methods: Forty-six physiotherapy students with chronic NSNP participated in this non-randomized comparative study and were allocated into two equal groups based on their availability and preference regarding session duration. Group A underwent GPR exercises combined with active neck exercises, whereas group B received DNF activation in addition to active neck exercises. All participants were assessed pre- and post-intervention for pain intensity using a visual analog scale (VAS), neck disability using the Arabic version of the neck disability index (NDI), FHP via a photometric method with Kinovea software, and DNF endurance using pressure biofeedback. Results: A significant effect of both treatments was reported on reducing pain intensity, improving the FHP and enhancing the neck functional status with no substantial differences between both groups. A significant improvement in DNF endurance was observed in both groups, with substantially higher values between groups in favor of the DNF group. Conclusions: Both GPR and DNF activation exercises were associated with reductions in pain and improvements in neck disability among physiotherapy students with chronic NSNP and FHP. Also, both CVA and DNF endurance improved, with more improvement observed in DNF endurance in the DNF group compared with the GPR group. Full article
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15 pages, 1295 KB  
Article
Effects of Caffeine Supplementation on Blood Glucose and Electromyographic Activity During Resistance Exercise: A Randomized, Double-Blind, Placebo-Controlled Crossover Study
by Guilherme Pereira Saborosa, Luciano Bernardes Leite, Pedro Forte, Bruno de Casio Coelho, Rafael Peixoto, Alexandra Malheiro, Pedro Afonso, Ana Claudia Pelissari Kravchychyn, Cintia Campolina Duarte Rocha da Silva, Christiano Eduardo Veneroso, Nuno Pimenta, Tiago Rafael Moreira, Helton de Sá Souza and Sandro Fernandes da Silva
Physiologia 2026, 6(2), 44; https://doi.org/10.3390/physiologia6020044 - 22 Jun 2026
Viewed by 104
Abstract
Background/Objectives: Caffeine is a widely used ergogenic aid; however, evidence regarding its effects on neuromuscular and metabolic responses during resistance training remains limited. Therefore, this study aimed to analyze the effects of caffeine supplementation on blood glucose concentration and neuromuscular activation, assessed through [...] Read more.
Background/Objectives: Caffeine is a widely used ergogenic aid; however, evidence regarding its effects on neuromuscular and metabolic responses during resistance training remains limited. Therefore, this study aimed to analyze the effects of caffeine supplementation on blood glucose concentration and neuromuscular activation, assessed through electromyographic activity, during a muscular endurance test. Methods: Eleven resistance-trained men (25.7 ± 5.9 years) participated in this randomized, double-blind, crossover trial. Six laboratory visits were conducted, including one-repetition maximum (1RM) and maximal voluntary isometric contraction (MVIC) testing in the bench press exercise. From the second visit onward (baseline; BL), participants completed a 24 h dietary recall (24hDR), pre- and post-exercise blood glucose assessments, and a muscular endurance test performed at 80% of 1RM until concentric failure, while electromyographic activity was recorded from the clavicular and sternal portions of the pectoralis major, triceps brachii, and anterior deltoid. From the third visit onward, participants received one of the following randomized interventions 60 min before testing: low-dose caffeine (LC = 3 mg·kg−1), high-dose caffeine (HC = 6 mg·kg−1), low-dose placebo (LP = 230 mg), or high-dose placebo (HP = 460 mg). Results: There was an increase in the number of repetitions in all conditions vs. BL, with no significant differences (p > 0.05). Electromyographic activity did not differ between conditions (p > 0.05). Blood glucose decreased post-test in BL and placebo conditions (p < 0.05) but remained stable with caffeine (p > 0.05). Conclusions: Low and high doses of caffeine did not significantly affect muscular endurance performance or neuromuscular activation. However, caffeine supplementation appeared to attenuate the post-exercise decline in blood glucose concentration following exercise performed to concentric failure. Full article
(This article belongs to the Special Issue Resistance Training Is Medicine: 2nd Edition)
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28 pages, 4517 KB  
Review
Balanced Essential Amino Acids as Synergistic Therapeutic Agents in Resistance Training: Mechanistic and Clinical Perspectives on Muscle and Metabolic Health
by Jiwoong Jang, Robert R. Wolfe and Il-Young Kim
Nutrients 2026, 18(12), 1990; https://doi.org/10.3390/nu18121990 - 19 Jun 2026
Viewed by 305
Abstract
Declines of skeletal muscle mass and functions are implicated in the progression of various clinical conditions such as cancers, obesity, insulin resistance, diabetes, and osteoporosis. While no effective and safe drugs against muscle wasting, such as sarcopenia and disease-associated cachexia, have been discovered, [...] Read more.
Declines of skeletal muscle mass and functions are implicated in the progression of various clinical conditions such as cancers, obesity, insulin resistance, diabetes, and osteoporosis. While no effective and safe drugs against muscle wasting, such as sarcopenia and disease-associated cachexia, have been discovered, it is well documented that dietary essential amino acids (EAAs) or high-quality protein work synergistically to enhance the anabolic effect of resistance exercise training (RT), leading to gains in muscle mass, strength, and muscle quality. Dietary EAAs serve as precursors and signaling molecules for the synthesis of new muscle proteins (both contractile and mitochondrial) and stimulate neuromuscular junction remodeling. Furthermore, EAAs consumed in the post-absorptive state improve endurance capacity via stimulation of mitochondrial biogenesis (independent of PGC1-α) and mitochondrial dynamics (mitochondrial protein synthesis and fission). Here, we discuss (1) traditional molecular mechanisms regulating the muscle proteome through constant turnover (synthesis and breakdown), (2) novel mechanisms by which dietary supplementation of EAAs during RT simultaneously improves muscle strength and endurance, (3) stable isotope tracer methodologies that enable understanding of the dynamic muscle proteome and accurate assessment of functional muscle mass, and finally, (4) clinical implications of combined EAA and RT interventions in the context of muscle and metabolic dysfunction, including sarcopenia, cachexia, obesity, and chronic disease. Collectively, current evidence underscores the potential of balanced EAAs, particularly when combined with resistance training, as a safe, effective, and translationally relevant nutritional strategy to preserve and enhance muscle and metabolic health across healthy and clinical populations. Full article
(This article belongs to the Special Issue Nutritional Supplements and Age- or Disease-Related Muscle Wasting)
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18 pages, 1415 KB  
Article
Negative Trend of Regularity of Locomotion in an Endurance Walking Task: Experimental Data from Healthy Adult Recreational Athletes in an Unsupervised 100 km March
by Marco Rabuffetti, Ilaria Carpinella, Stefan Mendt, Giampiero Merati, Mathias Steinach and Martina Anna Maggioni
Appl. Sci. 2026, 16(12), 6203; https://doi.org/10.3390/app16126203 - 19 Jun 2026
Viewed by 214
Abstract
(1) Background: Physical fatigue, either in short anaerobic exercises or in aerobic ones, affects locomotion patterns. Those effects, if consistently observed, may function as fatigue proxies. The present study focuses on the regularity of the pseudo-periodic acceleration patterns measured by a wearable sensor. [...] Read more.
(1) Background: Physical fatigue, either in short anaerobic exercises or in aerobic ones, affects locomotion patterns. Those effects, if consistently observed, may function as fatigue proxies. The present study focuses on the regularity of the pseudo-periodic acceleration patterns measured by a wearable sensor. Studies during laboratory anaerobic tasks on healthy subjects and on persons with multiple sclerosis during 6 min walking tests demonstrated that regularity decreases with fatigue. This study’s objective is to verify if the gait regularity during an unsupervised endurance aerobic walking task progressively decreases in healthy subjects. (2) Methods: Ten healthy male adults, not competitive recreational athletes, equipped with an accelerometer, participated in a non-competitive 100 km walk in about 24 h. (3) Results: Eight participants took from about 22 to 25 h to complete the task. Two did not finish. The trend of locomotion regularity (on average −6.3%, p < 0.001, effect size 1.41) was negative for all the participants. The gait speed decrease, in all the participants, explained less than 20% of the regularity decrease. Other outcome indices, such as that related to cadence, did not provide unique trends. (4) Conclusions: Regularity decrease is associated with fatigue in submaximal locomotor efforts; due to the experimental group limitations in size and composition, further studies should extend regularity assessments to women, and to persons with neuromuscular disabilities or attending walking rehabilitation. Full article
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22 pages, 3060 KB  
Systematic Review
Dose-Response Effect of Oral Caffeine Use on Aerobic Exercise Performance: A Systematic Review and Meta-Analysis
by Gabriel L. Martins, Juliana M. Aparecido, Marcelo L. Marquezi, Caroline S. Frientes, Leonardo R. Miedes, Matheus S. Fornel, Tiago Fernandes and Antônio Herbert Lancha
Nutrients 2026, 18(12), 1989; https://doi.org/10.3390/nu18121989 - 19 Jun 2026
Viewed by 652
Abstract
Background/Objective: Caffeine has demonstrated ergogenic effects across various doses (2–9 mg·kg−1). However, aerobic responses to caffeine vary substantially, with time-trial performance ranging from ~–3% to +16%. Given that higher doses may increase adverse effects without clear additional benefits, this review examined [...] Read more.
Background/Objective: Caffeine has demonstrated ergogenic effects across various doses (2–9 mg·kg−1). However, aerobic responses to caffeine vary substantially, with time-trial performance ranging from ~–3% to +16%. Given that higher doses may increase adverse effects without clear additional benefits, this review examined the effects of low (≤3 mg·kg−1), moderate (4–6 mg·kg−1), and high (>6 mg·kg−1) caffeine doses on time-trial performance. Methods: A systematic review and meta-analysis of randomized, placebo-controlled trials was conducted using PubMed, Embase, and Virtual Health Library databases. Eligible studies included healthy adults (18–59 years) acutely ingesting oral anhydrous caffeine before aerobic time-trial tests, with performance outcomes measured exclusively as time-to-completion variables. Data were pooled using standardized mean differences (SMDs) and 95% confidence intervals under random-effects models, and risk of bias was assessed using the Cochrane Risk of Bias tool. Results: Forty-eight studies (689 participants) met the inclusion criteria. Both low and moderate caffeine doses significantly reduced time-trial completion time relative to placebo. Low doses produced a standardized mean difference of −0.27 (95% CI: −0.44 to −0.11; p = 0.001), whereas moderate doses resulted in an SMD of −0.52 (95% CI: −0.77 to −0.28; p < 0.0001). No studies evaluating high caffeine doses (>6 mg·kg−1) and reporting time-to-completion outcomes met the inclusion criteria. Subgroup analyses demonstrated similar ergogenic effects in both trained and highly trained individuals consuming moderate caffeine doses. Conclusions: This is the first meta-analysis specifically focused on aerobic time-trial performance to suggest that pre-exercise ingestion of low caffeine doses (1.3–3 mg·kg−1) may enhance endurance performance by reducing time-trial completion time. Notably, the use of moderate caffeine doses (4–6 mg·kg−1) appears to produce a more consistent ergogenic effect. Full article
(This article belongs to the Special Issue Individualised Caffeine Use in Sport and Exercise)
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20 pages, 3508 KB  
Article
Effects of Empagliflozin Combined with Anaerobic, Aerobic, and Endurance Swimming Protocols on Cardiac Structure and Electrophysiology in Healthy Rats
by Samet Yavuz, Şahhan Kilic, Suha Asal, Mert Babaoglu, Cumaali Demirtaş, Mehmet Yildirim, Servet Altay and Ahmet Lütfullah Orhan
J. Clin. Med. 2026, 15(12), 4773; https://doi.org/10.3390/jcm15124773 - 19 Jun 2026
Viewed by 195
Abstract
Objective: Sodium–glucose cotransporter 2 (SGLT2) inhibitors, particularly empagliflozin, have attracted considerable attention because of their cardiovascular benefits beyond glycemic control. However, the interaction between empagliflozin and exercise-induced physiological cardiac remodeling in healthy individuals remains insufficiently understood. This study investigated the effects of [...] Read more.
Objective: Sodium–glucose cotransporter 2 (SGLT2) inhibitors, particularly empagliflozin, have attracted considerable attention because of their cardiovascular benefits beyond glycemic control. However, the interaction between empagliflozin and exercise-induced physiological cardiac remodeling in healthy individuals remains insufficiently understood. This study investigated the effects of different swimming exercise protocols (anaerobic, aerobic, and endurance), administered alone or in combination with empagliflozin, on cardiac structure and electrophysiology. Methods: Thirty-six male Sprague–Dawley rats were randomly assigned to six groups (n = 6 per group): anaerobic (An), aerobic (Ae), endurance (En), and the corresponding exercise groups combined with empagliflozin (An + Empa, Ae + Empa, and En + Empa). Empagliflozin was administered by oral gavage at a dose of 15 mg/kg/day for 30 days. Transthoracic echocardiography, electrocardiography (ECG), and gastrocnemius electromyography were performed at baseline and at the end of the study to assess cardiac remodeling, heart rate, and neuromuscular function. The study was carried out over a 30-day intervention period following ethics committee approval on 24 July 2024. Results: No significant between-group differences were observed in echocardiographic parameters before the intervention. On day 30, significant differences were identified among the groups in interventricular septal thickness at end-diastole (IVSd) (p = 0.027), left ventricular internal diameter at end-diastole (LVIDd) (p = 0.009), and end-diastolic volume (EDV) (p = 0.014). Bonferroni-corrected post hoc analysis showed that the aerobic exercise plus empagliflozin group differed from several exercise-only groups, particularly in parameters related to ventricular size and filling volume, including LVIDd and EDV (p < 0.008). On day 30, electrocardiographic repolarization-related parameters, including QT, QTc, JT, and Tpeak–Tend intervals, also differed significantly among the groups (all p < 0.05). In post hoc analysis, the anaerobic exercise group showed significant differences in QT and JT intervals compared with the aerobic and endurance groups (p < 0.008). In the anaerobic protocol, empagliflozin was associated with a reduction in heart rate compared with the corresponding control group (p = 0.019). No significant between-group differences were observed in EMG findings. Conclusions: Different exercise protocols induce distinct patterns of adaptation in cardiac structure and electrophysiology in healthy rats. Empagliflozin (15 mg/kg/day) may modulate exercise-induced cardiac responses in a modality-dependent manner; the most pronounced echocardiographic effects were observed in the aerobic protocol, whereas the effect on heart rate was observed in the anaerobic protocol. These findings highlight the need for longer-term and mechanistic studies to further clarify the effects of SGLT2 inhibitors on physiological cardiac remodeling. Full article
(This article belongs to the Section Cardiovascular Medicine)
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17 pages, 790 KB  
Article
The Relationship Between Biomarkers of Exercise-Induced Gastrointestinal Syndrome and Exercise-Associated Gastrointestinal Symptoms
by Keagan Hillemacher, Charlie Beaconsfield, Samuel Fitzgerald, Brooke Mahoney, Stephanie Gaskell, Rhiannon M. J. Snipe and Ricardo J. S. Costa
Sports 2026, 14(6), 248; https://doi.org/10.3390/sports14060248 - 17 Jun 2026
Viewed by 314
Abstract
Prolonged endurance exercise performed in hot ambient conditions is associated with an increased prevalence of performance-limiting gastrointestinal perturbations. This study aimed to examine the associations between biomarkers of exercise-induced gastrointestinal syndrome (EIGS) and exercise-associated gastrointestinal symptoms (Ex-GIS) under exertional heat stress (EHS). Fifty-six [...] Read more.
Prolonged endurance exercise performed in hot ambient conditions is associated with an increased prevalence of performance-limiting gastrointestinal perturbations. This study aimed to examine the associations between biomarkers of exercise-induced gastrointestinal syndrome (EIGS) and exercise-associated gastrointestinal symptoms (Ex-GIS) under exertional heat stress (EHS). Fifty-six non-heat acclimated endurance-trained individuals completed 2 h of steady state running at 60% maximal oxygen uptake (V.O2max) with an ambient temperature of 35.1 °C and relative humidity 29.4%. Venous blood samples were collected immediately pre- and post-exercise to quantify plasma concentrations of gastrointestinal epithelial injury and systemic inflammatory biomarkers, whilst gastrointestinal symptoms were recorded at regular intervals throughout the exercise protocol. Spearman’s rank correlation identified moderately significant relationships between interleukin-6 (IL-6) with defecation-bloody stools; interleukin-10 (IL-10) with upper abdominal pain; and IL-10, IL-1 receptor antagonist (IL-1ra), and systemic inflammatory response (SIR) profile with flatulence. Simple linear regression demonstrated that IL-6 explained a small but significant proportion of the variance defecation-bloody stool (adjusted R2 = 0.094, p = 0.024); whilst variance in flatulence was independently explained by IL-10 (adjusted R2 = 0.138, p = 0.025), IL-1ra (adjusted R2 = 0.122, p = 0.033), and SIR-Profile (adjusted R2 = 0.112, p = 0.040). These findings suggest that Ex-GIS development is multifactorial in aetiology and pathophysiology, and that symptom reporting alone likely underestimates perturbations to the gastrointestinal tract during EHS. Full article
(This article belongs to the Collection Human Physiology in Exercise, Health and Sports Performance)
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19 pages, 4903 KB  
Study Protocol
Integrating Music Listening into Exercise for Female Breast Cancer Survivors: Protocol for a Randomized Controlled Clinical Trial
by Ana Trigueros-Murillo, Alberto Marcos Heredia-Rizo, María Jesús Muñoz-Fernández and María Jesús Casuso-Holgado
Appl. Sci. 2026, 16(12), 6087; https://doi.org/10.3390/app16126087 - 16 Jun 2026
Viewed by 129
Abstract
Breast cancer is the most prevalent malignancy among women. The disease and its treatments often lead to physical and psychosocial impairments, compromising quality of life. While exercise and music-based interventions have individually demonstrated benefits on these symptoms, the advantages of their combination remain [...] Read more.
Breast cancer is the most prevalent malignancy among women. The disease and its treatments often lead to physical and psychosocial impairments, compromising quality of life. While exercise and music-based interventions have individually demonstrated benefits on these symptoms, the advantages of their combination remain unexplored. This study evaluates whether a concurrent exercise program, including aerobic and strength training performed while listening to music based on individual preferences, is more effective than the same exercise program without music in improving self-esteem, body image, cancer-related fatigue, physical function (upper and lower limb strength and cardiorespiratory endurance), quality of life, sleep quality, and intolerance of uncertainty in female breast cancer survivors. A single-blind, two-arm, parallel-group, randomized controlled trial will be conducted including 42 women who completed primary treatment for stage 0–III breast cancer at least six months before enrollment. Participants will be randomly assigned to a music-listening concurrent exercise training group (MLTG), or a no music exercise training group (NMLTG), both performing the same 8-week exercise program. The primary outcome will be self-esteem (Rosenberg Self-Esteem Scale). Secondary outcomes include body image, fatigue, upper and lower limb strength, cardiovascular endurance, quality of life, sleep quality, and intolerance of uncertainty. Measurements will be collected using validated and reliable questionnaires and standardized functional tests at baseline, post-intervention, and at 6 months. Data will be analyzed under the intention-to-treat principle. Music listening, particularly when based on individual preferences and synchronized with movement, may enhance mood and exercise performance while modulating reward-related neural pathways. This trial will provide new evidence on a feasible and low-cost strategy to enhance supportive care and physical and psychosocial outcomes in breast cancer survivors. ClinicalTrials.gov (NCT07045961). Ethics Committee code: 2025-0855. Full article
(This article belongs to the Special Issue The Impact of Sport and Exercise on Physical Health)
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12 pages, 609 KB  
Article
Agreement Between Same-Day and Separate-Day Assessment of Critical Power, W′, and Peak Oxygen Uptake in Recreational Cyclists and Triathletes
by Caleb S. Clay, Noah J. Perez, Payton E. Miller and John W. Farrell
Physiologia 2026, 6(2), 43; https://doi.org/10.3390/physiologia6020043 - 16 Jun 2026
Viewed by 201
Abstract
Objective: The purpose of this exploratory study was to examine mean differences, reliability, and agreement between CP and W′ derived from a 3MAT performed after an ICT and values obtained during a standalone 3MAT performed on a separate day. Methods: Ten recreationally trained [...] Read more.
Objective: The purpose of this exploratory study was to examine mean differences, reliability, and agreement between CP and W′ derived from a 3MAT performed after an ICT and values obtained during a standalone 3MAT performed on a separate day. Methods: Ten recreationally trained cyclists and triathletes completed four laboratory visits, including an ICT followed by a 3MAT after 30 min of recovery (same-day condition) and a standalone 3MAT performed on a separate day. CP and W′ were derived from both conditions and compared using paired t-tests and Bland–Altman agreement methods. Results: No systematic differences, but limited individual-level agreement were observed between same-day and separate-day conditions for CP (mean difference: 1.72 ± 36.5 W) or W′ (mean difference: 0.99 ± 5.9 kJ), with trivial to small effect sizes. Peak VO2 values were also not significantly different across testing conditions (p = 0.483). However, Bland–Altman analysis revealed wide limits of agreement for both CP (−69.8 to 73.3 W) and W′ (−10.7 to 12.7 kJ), indicating substantial variability at the individual level. Conclusions: Although same-day testing does not introduce systematic bias in CP or W′ estimation, the wide limits of agreement suggest that these protocols are not interchangeable for individual monitoring. Same-day testing may be appropriate for group-level assessments but should be used with caution when applied to individual athlete monitoring. Full article
(This article belongs to the Special Issue Exercise Physiology and Biochemistry: 3rd Edition)
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24 pages, 1540 KB  
Article
Effects of Short-Term Low- and High-Dose New Zealand Blackcurrant Supplementation on Exercise and Cognitive Performance in Resistance-Trained Adults: A Randomized, Double-Blind, Placebo-Controlled Crossover Study
by Majid S. Koozehchian, Faith M. Bonness, Rafaela Rafajlovska, Shelby N. Horton, Gina Mabrey, Alireza Naderi and Andrew T. Newton
Nutrients 2026, 18(12), 1929; https://doi.org/10.3390/nu18121929 - 15 Jun 2026
Viewed by 1165
Abstract
Background: New Zealand blackcurrant (NZBC) is an anthocyanin-rich supplement with reported ergogenic effects in endurance exercise; however, its effects in resistance-trained adults remain largely unexplored. Objective: This study aimed to examine whether seven days of low- or high-dose NZBC supplementation improves resistance exercise [...] Read more.
Background: New Zealand blackcurrant (NZBC) is an anthocyanin-rich supplement with reported ergogenic effects in endurance exercise; however, its effects in resistance-trained adults remain largely unexplored. Objective: This study aimed to examine whether seven days of low- or high-dose NZBC supplementation improves resistance exercise performance, anaerobic capacity, and cognitive function in resistance-trained adults. Methods: Twenty resistance-trained adults completed a randomized, double-blind, placebo-controlled crossover trial with four conditions: no-capsule control (CON), placebo (PL), low-dose blackcurrant (LDBC; 250 mg·day−1), and high-dose blackcurrant (HDBC; 600 mg·day−1), each for seven days. Outcomes included bench press and leg press 1RM, total lifting volume, Tendo-derived bench press power, 30 s Wingate performance, Stroop Color–Word Test scores, readiness, perceived exertion, hemodynamic responses, and adverse events. Results: LDBC and HDBC increased bench press 1RM versus CON and PL, with increases versus CON of +3.33 kg (ES = 0.72; p = 0.005) and +2.34 kg (ES = 0.49; p = 0.041), respectively. Leg press 1RM was higher in PL, LDBC, and HDBC versus CON, with the largest effects observed for LDBC (+37.2 kg, ES = 1.33; p < 0.001) and HDBC (+25.8 kg, ES = 1.11; p < 0.001). Leg press total lifting volume was substantially higher with LDBC (+2627 kg, ES = 1.56; p < 0.001) and HDBC (+1025 kg, ES = 0.74; p = 0.004) versus CON. Bench press volume showed no significant overall treatment effect (p > 0.05). For Tendo-derived power, HDBC exceeded PL for peak (+79.5 W; p = 0.006) and mean power (+46.2 W; p = 0.026). Wingate outcomes did not differ across conditions (all p > 0.05). LDBC exceeded PL on Stroop Color, Color–Word, and total scores (all p < 0.05); HDBC exceeded PL on Color–Word only. Hemodynamic responses and adverse events were comparable across all conditions. Conclusions: Short-term NZBC supplementation improved selected resistance-exercise and cognitive outcomes, with the strongest evidence observed for outcomes that exceeded both CON and PL. The PL response relative to CON suggests that non-specific capsule, expectancy, repeated testing, or period effects may have contributed to some of the lower-body improvements; therefore, placebo-controlled contrasts should be emphasized when interpreting NZBC-specific efficacy. Wingate performance was unaffected, and both doses were well tolerated over the short-term supplementation period. Full article
(This article belongs to the Section Sports Nutrition)
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20 pages, 869 KB  
Review
The Oxygen Imperative: Cardiorespiratory Fitness, Dose-Dependent Exercise Thresholds, and Longevity—A Narrative Review
by Dragos Cozma, Dan Gaita, Simina Crisan, Cristina Tudoran, Andreea Simina Dumitrescu and Cristina Văcărescu
J. Clin. Med. 2026, 15(12), 4597; https://doi.org/10.3390/jcm15124597 - 13 Jun 2026
Viewed by 156
Abstract
Background: The relationship between physical exercise and human longevity constitutes one of the most consequential intersections in contemporary preventive medicine. Although international guidelines recommend 150 min of moderate-intensity exercise weekly, growing evidence suggests that the architecture of optimal exercise is far more [...] Read more.
Background: The relationship between physical exercise and human longevity constitutes one of the most consequential intersections in contemporary preventive medicine. Although international guidelines recommend 150 min of moderate-intensity exercise weekly, growing evidence suggests that the architecture of optimal exercise is far more complex, encompassing dose, modality, timing across the lifespan, and the paradox risks imposed by extreme endurance. Methods: We included in this narrative review landmark cohort studies, randomized controlled trials, meta-analyses, and expert physiological frameworks published in high-impact cardiovascular, sports medicine, and longevity journals from 1966 to 2024. Results: Cardiorespiratory fitness (CRF), indexed by maximal oxygen uptake (VO2 max), demonstrates the strongest and most linear dose–response relationship with all-cause mortality identified in preventive medicine, with every 1 metabolic equivalent of task (MET) increment associated with a 12–15% reduction in mortality risk. The optimal dose of vigorous-intensity exercise follows a J-shaped dose–response curve: 3–5 sessions per week generating 1–2.4 h of vigorous activity is associated with the lowest all-cause mortality risk in large prospective cohorts, whereas chronic extreme endurance exercise incurs measurable atrial remodeling, patchy myocardial fibrosis, and a 5.3-fold increase in the risk of atrial fibrillation. The importance of exercise types shifts profoundly across the lifespan, transitioning from aerobic capacity effort in the third decade to resistance training in the seventh decade and neuromuscular stability in the eighth. Based on our interpretation of the available evidence, we propose a structured, personalized four-step exercise pathway integrating CRF assessment, lifespan-adapted prescription, lifestyle co-interventions, and periodic reassessment. Conclusions: Among currently available lifestyle interventions, regular exercise is consistently associated with some of the largest and most reproducible reductions in all-cause and cardiovascular mortality observed in prospective cohort data, while remaining accessible and cost-effective. Full article
(This article belongs to the Special Issue Advances in Clinical Exercise for Health)
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21 pages, 3825 KB  
Systematic Review
Effects of Withania somnifera (Ashwagandha) Supplementation on Exercise Performance: A Systematic Review and Three-Level Meta-Analysis
by Xiupeng Li, Hansen Li, Shuqi Yao, Ying Hou and Aiping Chi
Nutrients 2026, 18(12), 1915; https://doi.org/10.3390/nu18121915 - 12 Jun 2026
Viewed by 769
Abstract
Background/Objectives: Evidence for herbal ergogenic aids remains uncertain, and ashwagandha trials span heterogeneous performance domains. This review evaluated oral Withania somnifera supplementation on exercise performance and explored participant-, outcome-, formulation-, and supplementation-related moderators. Methods: PubMed, Web of Science, Cochrane Library, Embase, and SPORTDiscus-EBSCO [...] Read more.
Background/Objectives: Evidence for herbal ergogenic aids remains uncertain, and ashwagandha trials span heterogeneous performance domains. This review evaluated oral Withania somnifera supplementation on exercise performance and explored participant-, outcome-, formulation-, and supplementation-related moderators. Methods: PubMed, Web of Science, Cochrane Library, Embase, and SPORTDiscus-EBSCO were searched from inception to 1 April 2026. Eligible randomized controlled trials compared oral ashwagandha with placebo or control conditions and reported objective exercise-performance outcomes. Dependent effects were synthesized using restricted-maximum-likelihood three-level random-effects models; 95% prediction intervals, GRADE certainty ratings, subgroup analyses, and dose/duration meta-regressions were reported. Results: Thirteen trials involving 599 participants contributed 79 effect sizes. Samples were mainly young adults or athletes; reported ages included one 18–40-year trial and one late-adolescent athlete cohort aged 17.4 ± 1.7 years. Trial-level sex composition was four male-only, one female-only, three mixed-sex, and five incompletely reported cohorts. Ashwagandha improved overall exercise performance on average (Hedges’ g = 0.47, 95% CI [0.25, 0.69], p < 0.001; I2 = 60%; 95% prediction interval [−0.40, 1.33]), but the prediction interval crossed zero. Exercise type was the clearest moderator (P_between = 0.006): evidence was most consistent for aerobic endurance (g = 0.54, 95% CI [0.22, 0.85], p = 0.002), whereas strength effects were positive but uncertain and power or muscular endurance evidence remained sparse. Dose analyses were hypothesis-generating; 500–600 mg/day was the most evidence-supported extract-dose range. Conclusions: Oral ashwagandha may improve selected exercise-performance outcomes, particularly aerobic endurance, but benefits are not uniform across contexts. Future trials should be preregistered, adequately powered, double-blind, formulation-standardized, sex-stratified, and include rigorous blinding checks, mechanistic endpoints, adverse-event monitoring, and sport-specific performance tests. Full article
(This article belongs to the Section Sports Nutrition)
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24 pages, 2637 KB  
Article
Acute Effects of Hom Pathum and Tubtim Chumphae Rice Jellies on Glycemic Response, Endurance Performance, and Oxidative Stress in Healthy Adults: A Randomized Crossover Study
by Orachorn Boonla, Uraiporn Booranasuksakul, Pongrung Chancharoen, Thapanee Roengrit, Promtpong Anuchitchanchai and Piyapong Prasertsri
Foods 2026, 15(12), 2122; https://doi.org/10.3390/foods15122122 - 12 Jun 2026
Viewed by 486
Abstract
Thai rice varieties, including Hom Pathum (Pathumthani fragrant rice) and Tubtim Chumphae rice, contain bioactive compounds with potential antioxidant properties. In this study, their acute effects on glycemic response, cardiac autonomic function, endurance performance, and oxidative stress were investigated in healthy adults. [...] Read more.
Thai rice varieties, including Hom Pathum (Pathumthani fragrant rice) and Tubtim Chumphae rice, contain bioactive compounds with potential antioxidant properties. In this study, their acute effects on glycemic response, cardiac autonomic function, endurance performance, and oxidative stress were investigated in healthy adults. In a randomized crossover design, two independent cohorts of healthy adults were enrolled. A total of 50 participants completed two separate experiments (n = 25 per experiment), in which they consumed 140 g of control jelly, Hom Pathum rice jelly, and Tubtim Chumphae rice jelly in a randomized order on separate occasions. In Experiment 1, blood glucose (BG) was measured at baseline and every 30 min for 120 min, while insulin concentrations were assessed at baseline and after 120 min. In Experiment 2, participants performed treadmill exercise at 60% VO2peak to volitional exhaustion, and exercise-induced oxidative stress was evaluated following exercise. Postprandial BG responses differed significantly among interventions. At 30 min, BG concentrations were lower following Hom Pathum and Tubtim Chumphae rice jellies compared with the control jelly (p < 0.001 and p = 0.002, respectively), and these reductions were maintained between 60 and 120 min, with Tubtim Chumphae rice generally demonstrating greater glycemic attenuation (p < 0.05). The BG area under the curve was significantly lower following both rice jellies than following the control jelly (p ≤ 0.005). No significant differences were observed in insulin concentrations, HOMA indices, heart rate variability, or blood pressure among interventions. Both rice jellies improved endurance performance compared with the control condition (p < 0.05), whereas post-exercise malondialdehyde concentrations were significantly reduced only following Tubtim Chumphae rice consumption (p = 0.049). These findings suggest that acute consumption of Thai rice-based jellies, particularly Tubtim Chumphae rice jelly, may attenuate postprandial glycemic responses and enhance endurance performance, with Tubtim Chumphae rice additionally demonstrating potential to reduce exercise-induced oxidative stress. However, these findings reflect short-term physiological responses in healthy adults and should be interpreted cautiously pending further mechanistic and long-term investigations. Full article
(This article belongs to the Special Issue Functional Foods for Health Promotion and Disease Prevention)
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13 pages, 422 KB  
Article
Oral Health-Related Quality of Life and Maxillary Function in Wind Instrument Musicians: A Cross-Sectional Survey
by António Pereira Costa and José Frias-Bulhosa
BioMed 2026, 6(2), 14; https://doi.org/10.3390/biomed6020014 - 12 Jun 2026
Viewed by 243
Abstract
Background/Objectives: The performance of musical wind instruments imposes significant neuromuscular and biomechanical demands on the stomatognathic system. Depending on the mouthpiece type, wind instruments are divided into four classes, which may have distinct impacts on the instrumentalists’ quality of life. This study aimed [...] Read more.
Background/Objectives: The performance of musical wind instruments imposes significant neuromuscular and biomechanical demands on the stomatognathic system. Depending on the mouthpiece type, wind instruments are divided into four classes, which may have distinct impacts on the instrumentalists’ quality of life. This study aimed to evaluate musicians’ self-perception regarding the impact caused by wind instruments practice on oral health-related quality of life (OHRQoL), jaw functional limitations, and chronic pain. Methods: A cross-sectional observational study was conducted among 71 wind instrumentalists (52% female; mean age 24.16 years; mean practice history of 12.8 years) using the Oral Health Impact Profile-14 (OHIP-14), the Jaw Functional Limitation Scale (JFLS), and the Graded Chronic Pain Scale (GCPS). Data were analyzed using the Statistical Package for the Social Sciences (SPSS), with statistical significance set at p < 0.05. Results: Musicians in Class 1 (clarinet/saxophone) and Class 4 (transverse flute) reported the worst OHRQoL and chronic pain scores. Orofacial pain in the jaw, temple, or ear was reported by 66% of the participants. Joint sounds (36%) and closed jaw locking (26%) showed a significant association with female gender; however, this relationship is highly confounded by the strong female clustering in Class 4 (85%) and Class 1 (63%). Behavioral and practice habits significantly influenced outcomes: higher daily study duration (mean 170.31 min), the absence of relaxation exercises, and a willingness to endure physical discomfort for technical progress (73.2%) were significantly associated with lower quality of life and greater functional limitations (mastication and mobility). Performance anxiety, warm-up exercises, and practice intensity peaks showed no significant relationships with OHRQoL. Conclusions: Wind instrument practice severely impacts jaw function and musicians’ well-being. These findings underscore the need for interdisciplinary preventive interventions, including targeted ergonomic training, structured rest protocols, and jaw relaxation exercises, alongside oral public health initiatives that recognize wind musicians as an occupationally vulnerable group. Full article
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