Search Results (65)

Pickleball is a recent sport, and very little scientific information exists on its match performance, especially for mixed doubles. Therefore, the aim of this study was to describe the performance profile in relation to sex differences in terms of shot outcome, margin of victory, and advantage. Seventeen elite mixed double matches from Professional Pickleball Association tours were analyzed, specifically considering the final as well as the penultimate shot with regard to the sex of the opponent who played it to analyze the inter-player dynamics between the opponents. Elite mixed pickleball matches have been characterized by 1:1.4 work-to-rest ratio, with rallies meanly lasting 10.6 s and separated by 11.4 s between them. Among the 1678 final shots analyzed, males played significantly fewer forced errors and more winners than females, especially when the penultimate shot was played by a female opponent. No sex differences emerged when the penultimate shot was played by a male opponent. Additionally, males played more winners both when leading and when winning the match. Mixed doubles pickleball matches appear to be partially influenced by sex-imbalanced game dynamics, with a higher number of winners played by males, particularly when the preceding shot is played by a female, suggesting that this format offers only moderate inclusivity between sexes. Full article

Background/Objectives: This study examined the effects of a six-week eccentric–reactive training program on neuromechanical markers of lateral explosiveness, asymmetry, and stretch-shortening cycle (SSC) efficiency in elite male youth table tennis players. Fourteen national-level athletes (mean age = 16.6 years) were assigned to either an experimental group (EG, n = 7) or a control group (CG, n = 7). EG performed flywheel squats and lateral depth jumps three times per week, while CG maintained regular training. Pre- and post-intervention testing included countermovement jumps, reactive strength index (RSI_DJ), force asymmetry, time-to-stabilization, SSC efficiency, and energy transfer ratio (ETR), measured via force plates, EMG, and inertial sensors. Methods: Multi-dimensional statistical analysis revealed coordinated improvements in explosive power and movement efficiency following eccentric training that were not visible when examining individual measures separately. Athletes in the training group showed enhanced neuromechanical control and developed more efficient movement patterns compared to controls. The analysis successfully identified distinct performance profiles and demonstrated that the training program improved explosive characteristics in elite table tennis players. Results: Univariate ANOVAs showed no significant Group × Time effects for RSI_DJ, ETR, or SSC_Eff, although RSI_DJ displayed a moderate effect size in EG (d = 0.47, 95% CI [0.12, 0.82], p = 0.043). In contrast, MANOVA confirmed a significant multivariate Group × Time interaction (p = 0.013), demonstrating integrated neuromechanical adaptations. Regression analysis indicated lower baseline CMJ and RSI_DJ predicted greater RSI improvements. Conclusions: In conclusion, eccentric–reactive training promoted multidimensional neuromechanical adaptations in elite racket sport athletes, supporting the use of integrated monitoring and targeted eccentric loading to enhance lateral explosiveness and efficiency. Full article

As a key piece of equipment in badminton, the surface treatment technology of rackets has garnered significant attention in the fields of material science and sports engineering. This study is the first to systematically review research on racket coatings, integrating interdisciplinary knowledge on the classification of functional coatings, their performance-enhancing principles, and their relationship with competitive levels, thereby addressing a gap in theoretical research in this field. This study focuses on four major functional coating systems: superhydrophobic coatings (to improve environmental adaptability and reduce air resistance), anti-scratch coatings (to prolong the life of the equipment), vibration-damping coatings (to optimise vibration damping performance), and strength-enhancing coatings (to safeguard structural stability). In badminton, differences in player skill levels and usage scenarios lead to variations in racket materials, which, in turn, result in different preparation processes and performance effects. The use of vibration-damping materials alleviates the impact force on the wrist, effectively preventing sports injuries caused by prolonged training; leveraging the aerodynamic properties of superhydrophobic technology enhances racket swing speed, thereby improving hitting power and accuracy. From the perspective of performance optimization, coating technology improves athletic performance in three ways: nanocomposite coatings enhance the fatigue resistance of the racket frame; customized damping layers reduce muscle activation delays; and surface energy regulation technology improves grip stability. Challenges remain in the industrial application of environmentally friendly water-based coatings and the evaluation system for coating lifespan under multi-field coupling conditions. Future research should integrate intelligent algorithms to construct a tripartite optimization system of “racket-coating-user” and utilize digital sports platforms to analyze its mechanism of influence on professional athletes’ tactical choices, providing a theoretical paradigm and technical roadmap for the targeted development of next-generation smart badminton rackets. Full article

Padel is a doubles racket sport played on an enclosed court, characterised by intermittent high-intensity efforts, frequent directional changes, and short recovery periods. This study aimed to analyse the evolution of physiological responses and neuromuscular fatigue in amateur padel players according to playing position (Right Side [RS] vs. Left Side [LS]) and match outcome (Win or Lose). A total of 52 padel players (35.6 ± 11.6 years) participated, competing in 13 matches. The mean match duration was 57.2 ± 15.7 min, with an average of 152.0 ± 40.4 points per match. Physiological variables were recorded during each set, and neuromuscular variables (countermovement jump [CMJ] and handgrip strength) were assessed before the match and after each set. No significant differences in physiological load were found between winners and losers or between RS and LS positions. However, differences in handgrip strength were observed at T1 (p < 0.05, d = −0.72) and T2 (p < 0.05, d = −0.59) (post-set testing), with LS players showing higher grip strength. Regarding the progression of physiological responses across the different sets, a progressive increase in cardiovascular load was observed within each subgroup, with significant differences across sets (set 1, set 2, and set 3) in several variables, including HR_peak, HR_avg, zone 1, zone 2, zone 3, and TRIMP_Edwards. No performance decline was observed in CMJ or handgrip strength in any of the groups analysed. These findings suggest that physiological responses increase throughout a match, particularly in the final sets, but no signs of neuromuscular fatigue (CMJ and handgrip) were observed, regardless of match outcome or playing position. These results highlight the need to include high-intensity scenarios and role-specific strategies in training to address the progressive physiological demands and positional differences in match play. Full article

Purpose: To quantify real-time hand–foot coupling in tennis and test whether the coupling pattern differs by playing standard. Methods: Fifteen nationally certified second-level male athletes and fifteen recreational beginners performed multi-directional swings, alternating forehand–backhand groundstrokes and serve-and-volley sequences while tri-axial ankle acceleration and racket-grip force were synchronously recorded in wearable inertial measurement units (IMUs). Grip metrics (mean force, peak force, force duration) and acceleration magnitudes were analysed with MANOVA and Hedges’ g effect sizes, followed by the Benjamini–Hochberg correction (α = 0.025). Results: Across tasks, athletes showed higher mean ankle acceleration (standardised mean difference, Hedges’ g) but 45% lower mean grip force (Hedges’ g = −1.28; both p < 0.01). The association between acceleration and grip metrics was moderate-to-strong and negative in athletes (r = −0.62 with mean grip force; r = −0.69 with force duration), whereas beginners exhibited moderate-to-strong positive correlations (r = 0.48–0.73). Conclusion: We quantified hand–foot coordination in tennis by synchronising tri-axial ankle acceleration with calibrated racket-grip force across three match-realistic tasks. Relative to beginners, athletes demonstrated an inverse coupling between ankle acceleration and grip-force metrics, whereas beginners showed a direct coupling, consistent with our purpose of quantifying coordination via synchronised wearable sensors. Full article

The recent discovery of the Yezo virus (YEZV) in Japan and China has raised particular concern due to its potential to cause human diseases ranging from mild febrile illnesses to severe neurological disorders. We report, for the first time, the detection of five YEZV isolates in I. persulcatus ticks from three regions of Russia. The analysis was performed using 5318 ticks of two Ixodes genus collected in 2024 from 23 regions of Russia. The minimum infection rate of YEZV in Russia among I. persulcatus ticks was 0.12% (95% CI: 0.05–0.28). The westernmost and northernmost YEZV detection points have been recorded. YEZV isolates circulating in Russia are genetically diverse. Protein domains of Russian YEZV isolates’ genomes were characterized using HMMER, AlphaFold 3, and InterProScan. The YEZV nucleoprotein (N) of Russian isolates has a racket-shaped structure with “head” and “stalk” domains similar to those of Orthonairovirus haemorrhagiae. The Lys261–Arg261 substitution in the YEZV N Chita 2024-1 isolate occurs in the α11 structure in the region of interaction with viral RNA. Our results show that the distribution area of YEZV is much wider than previously known, provide new data on complete YEZV genomes, extend our structural insight into YEZV N, and suggest a potential target for antiviral drug development to treat YEZV infection. Full article

Background: This study aimed to examine the effects of an 8-week plyometric training program on lower-limb explosive strength, jump performance, musculotendinous stiffness, reactive strength index (RSI), and multidirectional speed in elite Polish badminton players. Methods: Twenty-four athletes were randomly assigned to either an experimental group (n = 15), which supplemented their regular badminton training with plyometric exercises, or a control group (n = 15), which continued standard technical training. Performance assessments included squat jump (SJ), countermovement jump (CMJ), single-leg jumps, sprint tests (5 m, 10 m), lateral movements, musculotendinous stiffness, and RSI measurements. Results: The experimental group showed statistically significant improvements in jump height, power output, stiffness, and 10 m sprint and lateral slide-step performance (p < 0.05), with large effect sizes. No significant changes were observed in the control group. Single-leg jump improvements suggested potential benefits for addressing lower-limb asymmetries. Conclusions: An 8-week plyometric intervention significantly enhanced lower-limb explosive performance and multidirectional movement capabilities in young badminton players. These findings support the integration of targeted plyometric training into regular training programs to optimize physical performance, improve movement efficiency, and potentially reduce injury risk in high-intensity racket sports. Full article

Squash, which originated in the early 19th century, was officially incorporated into the 2028 Los Angeles Olympic Games by the International Olympic Committee in 2023. This inclusion marks a significant milestone, highlighting its growing international recognition and potential for global development. However, squash has historically been underrepresented in academic research compared to other popular sports, with studies being scattered and relatively underdeveloped. To systematically evaluate the current state of squash research and foster academic development in the field, this study employs a combination of bibliometric and qualitative analyses, aiming to provide a comprehensive overview of squash research in terms of research progress, collaboration networks, key findings, and thematic evolution. Drawing on Web of Science, Scopus, and PubMed data, the analysis covers 206 publications from 36 countries spanning from 1973 to 2024. Network analysis based on co-authorship frequency and geographic clustering identifies the UK and Australia as leading contributors, with extensive collaboration among institutions and authors. Performance analysis (tactical and technical modeling), physiological profiling (energy demands), and medical studies (injury epidemiology) emerged as the three core research areas. The study reveals a shift in research focus from safety and physiological characteristics to performance enhancement, which is driven by technological innovation. Future research should prioritize underdeveloped areas such as youth development, psychology, and nutrition while integrating diverse participant groups (e.g., female athletes, recreational players) and advanced technologies. Full article

The adoption of artificial intelligence (AI) in sports training has the potential to revolutionize skill development, yet cost-effective solutions remain scarce, particularly in table tennis. To bridge this gap, we present an intelligent training system leveraging computer vision and machine learning for real-time performance analysis. The system integrates YOLOv5 for high-precision ball detection (98% accuracy) and MediaPipe for athlete posture evaluation. A dynamic time-wrapping algorithm further assesses stroke effectiveness, demonstrating statistically significant discrimination between beginner and intermediate players (p = 0.004 and Cohen’s d = 0.86) in a cohort of 50 participants. By automating feedback and reducing reliance on expert observation, this system offers a scalable tool for coaching, self-training, and sports analysis. Its modular design also allows adaptation to other racket sports, highlighting broader utility in athletic training and entertainment applications. Full article

This study investigates the tactical patterns and effectiveness of serve strategies in elite U-14 international boys’ tennis. Using an observational methodology, we analyzed 971 points from the quarterfinals to the final of the Les Petits As 2023 tournament, a prestigious event for junior players. Data were collected using the OBSTENNIS-JUNIOR-S23 instrument with the LINCE PLUS recording tool and processed with SPSS 25 and THEME 6 Edu software. The findings reveal that the first serve is significantly more effective than the second serve, particularly in short rallies (0–4 shots), where serves directed to the T-zone achieved the highest success rates. U-14 players did not exhibit a dominant serving pattern compared to professional players, distributing their serves relatively evenly across different target areas. Additionally, most players remained in deep baseline positions rather than stepping forward, limiting their ability to capitalize on serve placement. Tactical inefficiencies were evident in the execution of the serve +1 shot, where errors often extended rallies unnecessarily. These findings highlight the need for targeted training interventions to improve serve placement, forward positioning, and decision-making. Implementing these improvements could facilitate a smoother transition to higher levels of play and optimize performance in junior tennis competitions. Full article

The aims of this pilot study were to design a training protocol to improve the padel smash, based on the practice of medicine ball throws (shot put) and smashes (powerful smashes and smashes over the side fence), and to test the effectiveness of the designed training protocol. Four high-level male Finnish players completed two weekly sessions, each consisting of four sets of five medicine ball throws (2 kg), followed by five smashes. Sufficient rest between sets and repetitions was ensured to minimize fatigue and reduce injury risk while maximizing power output. Performance was assessed through pre- and post-tests. A paired t-test analyzed the powerful smash, while contingency tables and the Chi-square test (χ²) evaluated the smash over the side fence. Three of the four players showed a significant increase in powerful smash distance, while the success rate of smashes over the side fence improved but did not reach statistical significance. These findings suggest that the designed training protocol improves powerful smashes and smashes over the side fence, potentially optimizing performance. Future research with larger samples is needed to refine training guidelines and explore broader implications for performance, injury prevention, and long-term athlete development. Full article

The aim of this scoping review was to examine the existing literature on padel among young players (under 18) and classify its main research areas. A systematic search in PubMed, Scopus, and Web of Science identified 16 studies on teaching methodologies, psychological characteristics, physiological demands, physical attributes, and gameplay parameters. This review provides the first comprehensive synthesis of research on youth padel. The findings suggest that a search-based teaching methodology enhances skill acquisition more effectively than traditional methods. Modifying the court dimensions (20 × 10 m to 10 × 6 m) and ball pressure optimizes learning in early training (~8–10 years). At advanced levels, training with professional players increases motivation and performance. The psychological analysis shows higher self-confidence and lower cognitive and somatic anxiety, with boys exhibiting greater somatic anxiety than girls, highlighting the need for sex-specific psychological strategies. The physiological findings establish reference values, with a higher VO2max in boys and younger players. In physical performance, boys outperform girls in terms of jump height and strength, while girls excel in agility. The gameplay analysis reveals that the rally duration increases with the skill level (7–9 s in beginners, 9–12 s in national players), the stroke frequency varies by level (from 4 at initiation level to 6–9 at regional and national levels), and there are differences in specific technical actions (forehand and backhand for initiation level, volleys for advanced level, and bandeja to finish points). From a practical standpoint, these insights can help coaches to tailor training strategies by considering a player’s age, sex, and competitive level, optimizing youth padel performance. Full article

Padel is a racket sport that has grown internationally, both in the number of players and in the number of competitions. Inertial measurement devices enable a comprehensive analysis of competitive load in padel by providing kinematic variables that enhance players’ performance in this discipline. This study aimed to analyse the external load variables recorded with an inertial device in elite padel players, comparing metrics based on the players’ positions (left and right sides of the court). A total of 83 players were monitored during 23 matches of the professional circuit. The results revealed specific load metrics, including distance covered, frequency of accelerations and decelerations per hour, maximum speeds reached, and acceleration profiles relative to distance covered, which were all measured using the Wimu Pro™ device. Left-side players showed more frequent accelerations and decelerations per hour compared to right-side players. The results of this study will, on one hand, enable the adjustment of new specific parameters for professional padel training, such as acceleration and deceleration profiles, player load, and distances covered at explosive speeds. On the other hand, the results will provide a more objective evaluation of padel players’ performance based on their positions. Full article

Background/Objectives: In tennis, timing plays a crucial factor as it influences the technique and effectiveness of strokes and, therefore, matches results. However, traditional technical evaluation methods rely on subjective observations or video motion-tracking technology, mainly focusing on spatial components. This study evaluated the reliability of an acoustic detection system in analyzing key temporal elements of the game, such as the rally rhythm and timing of strokes. Methods: Based on a machine learning algorithm, the proposed acoustic detection system classifies the sound of the ball’s impact on the racket and the ground to measure the time between them and give immediate feedback to the player. We performed trials with expert and amateur players in controlled settings. Results: The ML algorithm showed a detection accuracy higher than 95%, while the average accuracy of the whole system that was applied on-court was 85%. Moreover, this system has proven effective in evaluating the technical skills of a group of players on the court and highlighting their areas for improvement, showing significant potential for practical applications in player training and performance analysis. Conclusions: Quantitatively assessing timing offers a new perspective for coaches and players to improve performance and technique, providing objective data to set training regimens and optimize game strategies. Full article

The badminton jump smash is vital for winning rallies, but players can have unintended variations in performance. This study examines the causes of intra-individual smash speed variations among 19 Malaysian male elite players. Twenty-five jump smashes were recorded using a 3D motion capture system, with the three fastest (95.0 ± 3.6 m·s⁻¹) and three slowest (85.8 ± 5.8 m·s⁻¹) smashes per participant categorised into different groups. Six racket/shuttlecock variables and six upper body technique variables during the swing phase and at the point of contact were analysed. Five out of the six racket/shuttlecock variables, including post-impact shuttlecock speed, racket head speed at contact, impact location, distance from the racket’s geometric centre, and swing time, significantly differed between groups. Only the shoulder elevation angle differed significantly from 75% to 95% of the forward swing (p = 0.023), with less elevation during faster smashes. Consistency in producing high shuttlecock speeds during the jump smash for elite players is primarily achieved through variables linked to timing. Players/coaches should focus on being able to initially produce high racket head speeds, at which point ensuring a consistently efficient impact between the stringbed and shuttlecock should be the priority. Full article