Search Results (28)

Background: Exercise is known to help with the effects of the menopause, but women from low socioeconomic status (SES) tend to exercise less at this stage of life. Therefore, this study aimed to investigate the physical and psychological effects of a Zumba Gold^® community-based intervention in postmenopausal women from low SES. Methods: Forty-three women were divided into a Zumba Gold^® (ZG) and control (C) group, and participated in pre- and post-testing sessions, separated by a 12-week intervention period. The outcomes measured were: body composition, sit-to-stand (STS), six-minute walk test (6MWT), balance, Short Form Health Survey (SF-12), Multidimensional Fatigue Index (MFI-20), Self-Efficacy for Exercise (SEE), Behavioral Regulations in Exercise (BREQ-2), Hospital Anxiety and Depression Scale (HADS), and Social Connectedness questionnaires. Semi-structured interviews were also performed on 15 ZG participants. Results: The results showed significant improvements in the ZG group only for STS, 6MWT, mental health, fatigue (general, physical, and mental), social connectedness score, and a significantly lower level of amotivation. Zumba Gold^® had positive effects on four main themes: belonging, non-judgmental place, psychological motivational factors, and mind–body connection. Conclusions:This is the first study to show that ZG is beneficial for this population and encourages similar studies on other aspects of the menopause. Full article

(1) Background: Physical inactivity is a major public health concern in modern society. Group fitness programs are widely used to promote physical activity, combining choreographed movements with various dance steps and music. This study aimed to examine the effects of Zumba and MoFit group fitness programs on body composition parameters in women. (2) Methods: The study included 98 female participants (Mean age = 27.8 ± 2.9 years), divided into three groups: E1 (n = 33), which followed the experimental Zumba program; E2 (n = 31), which followed the experimental MoFit program; and a control group (n = 34), which continued with their usual daily activities for 10 weeks. Body composition was assessed using 14 variables measured with the InBody 270 analyser. Statistical analyses included paired t-tests, MANCOVA, and ANCOVA. (3) Results: The findings confirmed the positive effects of both group fitness programs on most body composition parameters in women (p < 0.001). However, Bonferroni post hoc test results indicated that the Zumba program led to significantly greater improvements in most body composition variables compared to the MoFit program. (4) Conclusions: Both Zumba and MoFit programs were effective in reducing body fat, increasing muscle mass, total body water, and mineral content, whereas the control group did not achieve positive changes. Full article

This study examines the relationship between fear of failure, entrepreneurial passion, and entrepreneurial self-efficacy among university business students from four emerging Latin American economies: Mexico, Colombia, Peru, and Ecuador. This research addresses the need to understand the psychological factors that influence entrepreneurship, particularly in developing economies. Using non-probability convenience sampling, surveys were distributed between June 2021 and August 2022, and 961 valid responses were obtained. Scales from renowned researchers were used, which were translated and semantically validated in Spanish to measure the three variables. The data were analyzed using structural equation modeling with PLS. The overall results reveal that fear of failure negatively affects entrepreneurial passion, while entrepreneurial passion has a positive and significant relationship with entrepreneurial self-efficacy. Furthermore, entrepreneurial passion has a positive and significant relationship with fear of failure and entrepreneurial self-efficacy, with substantial differences between countries. Gender differences were also identified: in women, all relationships in the model were significant, while in men, the direct effect of fear of failure on entrepreneurial self-efficacy did not reach statistical significance. These findings contribute to the entrepreneurship literature by demonstrating that the relationship between these psychological variables varies by context (country) and gender, contradicting the notion of a universal effect. Full article

This study addresses the challenge of improving fault management in hydroelectric systems using Petri nets. The objective is to propose a novel methodology for efficient fault diagnosis and intervention in the Governor system, a critical component in regulating turbine speed. Traditional diagnostic approaches often rely on manual inspection and expert intuition, and they lack formal mechanisms to model concurrent or asynchronous system behavior—leading to delays and reduced accuracy in fault identification. Our approach introduces a structured modeling technique using Petri nets, enabling dynamic analysis of the system’s behavior and response to faults. A detailed methodology was developed, beginning with a thorough characterization of the system and its translation into a Petri net model. Simulation results demonstrate the model’s effectiveness in significantly reducing diagnostic and intervention times compared to traditional methods. Results show that using Petri nets improves fault detection accuracy, accelerates decision-making, and optimizes resource allocation. This research concludes that the proposed model offers a robust framework for enhancing fault management in hydroelectric plants, providing both operational efficiency and reduced downtime. Future work will focus on integrating real-time monitoring and further validating the model in live environments to ensure scalability and adaptability to other power generation systems. Full article

Background/Objectives: In this study, we aimed to examine the effect of a 12-week dance (Zumba) performance on the fear of happiness and life satisfaction perceptions of high school students studying at boarding school. Methods: The sample group of this study consisted of high school students staying in the school dormitory in the 2022–2023 academic year. A total of 82 students between the ages of 15 and 17, selected by the convenience sampling method, participated in the study, and 41 of the students were selected as the experimental group and 41 as the control group. The Fear of Happiness Scale and Satisfaction with Life Scale were used in the study. The measurement tools were administered as a pre-test one week before the dance program started and as a post-test one week after the end of the program. Two-way ANOVA for mixed measures was applied to determine whether the fear of happiness and life satisfaction pre-test scores were statistically significantly different between the experimental and control groups and to compare the pre-test and post-test difference scores. Results: As a result of the research, it was concluded that the fear of happiness of the students who participated in the dance activity decreased, and their life satisfaction levels increased. These findings emphasize that dance can be an important resource that can increase the psychological well-being of young people. Conclusions: As a result, it can be said that the 12-week dance activity positively affected students’ fear of happiness and life satisfaction perceptions. Full article

This article addresses the integration of Education for Sustainable Development (ESD) in higher education institutions, exploring its effects on academic performance and students’ ability to address sustainability challenges. Using the PRISMA 2020 methodology for a systematic literature review, 50 relevant articles were selected from 543 records, providing data on the academic impacts of ESD through bibliometric approaches and surveys. The results revealed that ESD improves academic performance, motivation and engagement, as well as enhances students’ ability to solve complex problems sustainably. However, significant barriers, such as a lack of resources and adequate teacher training, hinder effective implementation. Approximately 60% of students in ESD programs show greater motivation and analytical abilities compared to 50% in traditional programs. ESD enriches academic training and equips students with essential practical skills, preparing them to be agents of positive change. Incorporating emerging technologies and participatory learning methods is crucial to enhancing ESD effectiveness. Greater investment in teacher training and standardized educational materials, along with the promotion of international collaboration to share resources and best practices, is required. Full article

This study aimed to describe the heart rate (HR) responses of post-menopausal women during Zumba Gold^® classes and to investigate the effects of body fat on HR responses. Twenty-three post-menopausal women (68.8 ± 7.2 years old; 160.0 ± 5.2 cm; 66.9 ± 11.1 kg, 36.0 ± 9.9% body fat) participated. Baseline testing assessed participants’ anthropometric and fitness characteristics. Then, HR measurements were taken during four of their regular Zumba Gold^® classes, and average HR (HR_mean), as well as time spent in different HR intensity categories, was calculated. Linear regressions and t-tests were performed to analyse the data. The average HR during Zumba Gold^® classes was 70.2% of maximum HR. Women with lower body fat achieved a significantly higher HR_mean and spent less time at light to very light intensity and more time at moderate intensity compared to those with higher body fat. Body fat percentage and age were identified as determinants of time spent at moderate intensity. These findings suggest that Zumba Gold^® can be an effective exercise option for post-menopausal women aiming to meet the recommended daily exercise guidelines. Understanding the HR responses during Zumba Gold^® classes can aid in the development of safe and effective exercise prescriptions for this population. Full article

This research focuses on the development and simulation analysis of heat-dissipating fins made of copper, integrated into photovoltaic panels, with the aim of mitigating temperature increases during operation. This initiative arises from evidence that solar panels experience a reduction in energy efficiency when operating at temperatures higher than standard test conditions. The photovoltaic panel was simulated both without fins and with fins under standard test conditions and extreme conditions. The simulation consists of the following steps: design, meshing, selection of physical models and materials, assignment of boundary conditions, validation of the simulation, and interpretation of the results. During validation, results obtained via simulation were compared experimentally, yielding a mean absolute percentage error of 0.28%. It was concluded that the fins with the greatest heat dissipation relative to their area are those of 40 mm height; with this height, the temperature of the photovoltaic panel is reduced by 2.64 K, which represents an efficiency increase of 1.32%. Furthermore, it was concluded from the analyzed data that the efficiency of the fins increases at high temperatures. Full article

This study aimed to compare the effects of Zumba and Pilates training on functional performance, mood, and health-related quality of life in postmenopausal women. Fifty-four postmenopausal women, aged 55–65, were randomly allocated to a control group (CG), a Pilates group (PG), or a Zumba group (ZG). Functional performance factors, in terms of walking speed, lower body muscle strength, dynamic balance, and functional mobility, as well as mood and health-related quality of life (HRQoL), were assessed before and after the intervention period. As results, both training modalities significantly improved the walking speed (PG (p < 0.001)/ZG (p < 0.001)), strength (PG (p < 0.001)/ZG (p < 0.05)), dynamic balance (PG (p < 0.001)/ZG (p < 0.001)), and functional mobility (PG (p < 0.001)/ZG (p < 0.001)), as well as mood (PG (p < 0.01)/ZG (p < 0.001)). Additionally, both intervention programs significantly improved their HRQol [physical function (PG (p < 0.001)/ZG (p < 0.001)) domain and SF36 total scores (PG (p < 0.01)/ZG (p < 0.001))] with better performance following Zumba training. However, the domains of social function (p < 0.001), mental health (p < 0.001), and role limitation due to emotional problems (p < 0.05) significantly enhanced only for the ZG. In conclusion, Pilates or Zumba training appears to be an ideal exercise for promoting functional performance, mood, and HRQoL in postmenopausal women. However, Zumba training seems to be more effective, resulting in optimal scores. Full article

Background: Women are considered less active than men, and a sedentary lifestyle particularly affects middle-aged women and affects their overall health. Recommending group fitness programs that have a positive effect on women’s overall health is an important strategy of any health policy. Thus, the purpose of this study was to investigate how the Zumba Fitness^® workout affects healthy inactive women’s respiratory function and body composition. Methods: The research was conducted for eight weeks on a sample of 41 females aged 35 to 45 divided into two groups: experimental (21 subjects: age 38.52 ± 2.29) and control (20 subjects: age 39.45 ± 3.01). They were tested before, four weeks, and eight weeks after the intervention period. The respiratory functions were tested using spirometry and the body composition parameters by the Tanita body analyzer. The experimental group practiced Zumba Fitness^® three times per week for 60 min (24 training sessions in total). The control group was not physically active during the intervention period. Results: After the Zumba Fitness^® program, the experimental group showed a significant improvement in the following respiratory function parameters: forced expiratory volume in the first second (M = 4.02 ± 0.69; MD = 0.65, p = 0.01, ES = 0.14), vital capacity (M = 4.10 ± 0.65: MD = −0.63, p = 0.03, ES = 0.11) and lung age (M = 30.95 ± 10.30; MD = 8.52, p = 0.04, ES = 0.10). The body composition parameters were significantly decreased: body mass (M = 60.09 ± 7.57; MD = 6.32, p = 0.03, ES = 0.11), body mass index (M = 20.44 ± 2.63; MD = 2.61, p = 0.01, ES = 0.13) and fat mass (M = 16.07 ± 4.87; MD = 3.95, p = 0.03, ES = 0.11). Conclusions: The results of the current study suggest that the Zumba Fitness^® workout is a beneficial exercise method not only for reducing body parameters but also for improving respiratory function in inactive women. Full article

In recent years, the dental treatment of children under sedation and/or general anesthesia on an outpatient basis has been developed as a behavioral management model in pediatric dentistry. The objective of this study was to establish the percentage of pediatric patients who required deep sedation on an outpatient basis in dental offices in the city of Cuenca, Ecuador. An observational study was conducted with a sample of 450 records of school- and preschool-age patients, where the variables were type and time of treatment, age, and sex. Statistical data were analyzed using the statistical program SPSS V.27 (IBM, Armonk, NY, USA). The highest percentage of children who received sedation were of preschool age. In general, there were three types of procedures per session, the most frequent being restorations (67%), followed by pulp treatment (49.8%) and, less frequently, minor surgery. The need for sedation for dental procedures is high in preschool patients, and ambulatory sedation has contributed to meeting this need. However, a regulation for its use is required at a national level. Full article

Trypanosoma cruzi is a protozoan parasite responsible for Chagas disease, which affects millions around the world and is not treatable in its chronic stage. Sodium diethyldithiocarbamate is a compound belonging to the carbamate class and, in a previous study, demonstrated high efficacy against T. cruzi, showing itself to be a promising compound for the treatment of Chagas disease. This study investigates the encapsulation of sodium diethyldithiocarbamate by poly-lactic acid in nanoparticles, a system of biodegradable nanoparticles that is capable of reducing the toxicity caused by free DETC against cells and maintaining the antiparasitic activity. The nanosystem PLA-DETC was fabricated using nanoprecipitation, and its physical characterization was measured via DLS, SEM, and AFM, demonstrating a small size around 168 nm and a zeta potential of around −19 mv. Furthermore, the toxicity was determined by MTT reduction against three cell lines (VERO, 3T3, and RAW), and when compared to free DETC, we observed a reduction in cell mortality, demonstrating the importance of DETC nanoencapsulation. In addition, the nanoparticles were stained with FITC and put in contact with cells for 24 h, followed by confirmation of whether the nanosystem was inside the cells. Lastly, the antiparasitic activity against different strains of T. cruzi in trypomastigote forms was determined by resazurin reduction and ROS production, which demonstrated high efficacy towards T. cruzi equal to that of free DETC. Full article

In this work, we analyze the income tax in Ecuador in 2020, which was affected simultaneously by two factors: the economic crisis caused by COVID-19 and the implementation of a new tax system. The objective is to evaluate the effects of these factors on the economic status of a group of taxpayers and the difference in tax payments compared with previous periods. A quantitative study was carried out, collecting financial data from 30 microenterprises for three fiscal periods. We also analyze the relationship between sales and the taxes paid in the same year, as well as the difference between the previous regime and the system applied in the first year of the pandemic to determine income tax. The results indicate an increase in the tax paid despite a noticeable decrease in sales due to confinement and other sanitary measures. In addition, we verified a significant difference between the two analyzed regimes, mainly because the pandemic regime calculates the tax based solely on income and does not consider expenses. We conclude that 43.33% of the microentrepreneurs we analyzed concluded the fiscal year with an accounting loss. This implies a debt for the following period and the risk of bankruptcy in the future. Full article

Background: This 40-weeks intervention study evaluates the effects on self-reported health status, emotional wellbeing, general self-efficacy and sleep problems among female hospital employees. Methods: 107 employees were cluster-randomized into three groups; football (FG), Zumba (ZG) and control (CG). Outcome measurements were conducted at baseline, 12 and 40 weeks. Weekly training frequencies in the first 12 and next 28 weeks were 2.4 ± 0.3 and 0.8 ± 0.2 in FG and 2.3 ± 0.3 and 0.9 ± 0.2 in ZG. Results: Compared to the CG, the ZG showed significant improvement in self-reported health status (p = 0.025), a reduced frequency of poor and restless sleep (on a 0–4 scale) (p = 0.004), as well as a tendency for reduction in the frequency of problems falling asleep (p = 0.055) and overall sleep problems (p = 0.051). Between baseline and 12 weeks, both the FG (p = 0.017) and the ZG (p = 0.017) showed within-group improvements in emotional wellbeing, whereas this improvement was maintained only in the ZG between baseline and 40 weeks (p = 0.002). The FG showed a significant within-group improvement in general self-efficacy (p = 0.012) between baseline and 12 weeks follow-up, with no such improvements in the other groups. Conclusion: The present findings revealed that a physical activity intervention with Zumba as well as football training may improve mental health and sleep outcomes in female hospital staff. Full article

The present study investigated the effect of a dance-based aerobic exercise, on the affective experiences of participants with different fitness levels. Thirty-two college students were enrolled in the same dance fitness course, tested using a physical fitness test (the National Fitness Project 100) and grouped accordingly to 15 sports majors (high-fit group) and 17 non-sports majors (low-fit group). Together, they participated in a single-session dance fitness program using 11 basic dance steps incorporated in Zumba rhythms of merengue and reggaeton for 47 min including warm-up and cool-down. Pre- and post-exercise affects were measured using the PANAS-X transmitted to each participant’s smartphone. During exercise, participants’ heart rate (HR) and their responses to the felt arousal scale (FAS) and the feeling scale (FS) by exercise section were measured using tailor-made applications on a smartwatch. Results showed that the intensity of exercise for the same exercise program was lower in the high-fit group than in the low-fit group, as evidenced by %HRmax. In addition, the pattern of affective change throughout the exercise sections was different according to the groups’ fitness levels, while the affective improvement was greater in the high-fit group. This study confirmed that physical fitness is a major variable influencing the relationship between exercise and affect. Full article