Analysis of the Energy Expenditure of Sports School Activities in Children.

(1) Background: This study explores the potential energy expenditure associated with participation in after-school sports activities among primary school children. (2) Methods: The study involved 129 children age (11.35 ± 0.55 years) recruited from eight different public after-school sport programs. (3) Results: Data analyses revealed significant differences between the eight sports in total calories per session, calories per minute, and METs (p < 0.05). All sports showed higher energy expenditure compared to chess (p < 0.05), with soccer and rugby exhibiting the highest energy expenditure per session. Team sports showed elevated energy consumption per session (p < 0.01, r > 0.30), calories per minute (p = 0.01, r > 0.40), and METs (p < 0.01, r > 0.40) in comparison with individual sports. (4) Conclusions: These findings enhance our understanding of the energy expenditure observed in primary school children following various after-school sports activities. The results indicate that team sports, in particular, are pivotal in elevating physical activity levels, thereby playing an essential role in fostering healthier lifestyles among children.

Benefits of Table Tennis for Children and Adolescents: A Narrative Review.

This study aims to review the scientific evidence regarding the effects of table tennis practice on children and adolescents. Studies were searched in three electronic databases (PubMed, Scopus, and SportDiscus) from their inception up to May 2024. The methodological quality of the included studies was assessed using the 10-point Physiotherapy Evidence Database (PEDro) and Methodological Index for Non-Randomized Studies (MINORS). A total of twelve studies were examined, with interventions involving children with intellectual disabilities, ADHD, DCD, ASD, and typically developing children. A variety of training programs were assessed over durations ranging from 6 weeks to 1 year in the studies included. Table tennis was shown to positively impact various domains, including executive function, motor skills, visual perception, graphomotor function, gross motor skills, coordination capacity, behavioral inhibition, and social behavior. Nonetheless, it is imperative to expand the number of studies on children and adolescents with diverse conditions to more comprehensively evaluate the benefits of table tennis for each specific condition.

Body Dissatisfaction among Young Girls in Recreational Rhythmic Gymnastics.

Body dissatisfaction is commonly associated with rhythmic gymnastics (RG) practice, but limited research exists on the prevalence of this issue among recreational level practitioners. This study examines body image dissatisfaction among young girls practicing RG recreationally. A total of 88 girls between six and eleven years of age, who participate in RG as an extracurricular activity, were measured and completed the Stunkard pictogram. To create a control group, 88 girls who did not practice RG were also recruited and matched to the gymnasts by age. Results revealed that the mean body mass index values in both groups were within the normal weight range. The mean score for body dissatisfaction was similar between the two groups, with slightly positive values (RG = 0.94; CG = 1.06). The Mann-Whitney U test showed that there was no significant difference in the ratings of actual body size, ideal body size, and body dissatisfaction between the RG and control groups. These findings suggest that practicing RG at a young age is not associated with body dissatisfaction among girls.

Nordic Walking as a Non-Pharmacological Intervention for Chronic Pain and Fatigue: Systematic Review.

OBJECTIVE: We aimed to analyze and summarize the available scientific evidence on the benefits of Nordic walking for people with chronic pain and fatigue. LITERATURE SURVEY: This systematic review adhered to PRISMA guidelines and conducted a comprehensive search across five databases using the PICO strategy. METHODOLOGY: Inclusion criteria encompassed randomized trials evaluating Nordic walking for pain and fatigue. Two authors independently screened studies, extracted data, and assessed methodological quality using the PEDro scale. SYNTHESIS: A total of 14 studies were included, with sample sizes ranging from 20 to 136 participants. The methodological quality of the included studies varied from fair (five studies) to good (nine studies). The interventions consisted of supervised Nordic walking sessions lasting 6 to 24 weeks, with a frequency of 2 to 4 days per week and duration of 25 to 75 min. The results of this review suggest that Nordic walking had beneficial effects in six of the eight studies that analyzed participant fatigue. However, Nordic walking did not show greater beneficial effects on fatigue than walking (two studies) or than not performing physical activity (one study). Additionally, six of the nine studies that examined the effects of Nordic walking on participants' perceptions of pain showed beneficial results. However, five studies that compared Nordic walking with control groups did not find any significant inter-group differences on pain. CONCLUSIONS: Based on our findings, Nordic walking exercise programs provide a potentially efficient method for alleviating pain and fatigue in people with chronic conditions. Its straightforwardness and ease of learning make it accessible to a broad spectrum of participants, which can result in higher adherence rates and lasting positive effects.

Dose-response associations, physical activity intensity and mortality risk: A narrative review.

Physical activity is consistently associated with reduced mortality, decreased risk for non-communicable diseases, and improved mental health in observational studies. Randomized controlled trials and observational Mendelian randomization studies support causal links between physical activity and health outcomes. However, the scarcity of evidence from randomized controlled trials, along with their inherent challenges like exposure contrasts, healthy volunteer biases, loss to follow-up, and limited real-world dose-response data, warrants a comprehensive approach. This review advocates synthesizing insights from diverse study designs to better understand the causal relationship between physical activity, mortality risk, and other health outcomes. Additionally, it summarizes recent research since the publication of current physical activity recommendations. Novel observational studies utilizing device-measured physical activity underscore the importance of every minute of activity and suggest that all intensity levels confer health benefits, with vigorous-intensity potentially requiring lower volumes for substantial benefits. Future guidelines, informed by device-measured physical activity studies, may offer refined age-specific recommendations, emphasize vigorous-intensity physical activity, and include daily step counts as a simple, easily assessable metric using commercial wearables.

Leisure-time physical activity and all-cause mortality and cardiovascular disease in adults with type 2 diabetes: Cross-country comparison of cohort studies.

PURPOSE: This study aimed to quantify the dose-response association and the minimal effective dose of leisure-time physical activity (PA) to prevent mortality and cardiovascular disease in adults with type 2 diabetes. METHODS: Cross-country comparison of 2 prospective cohort studies including 14,913 and 17,457 population-based adults with type 2 diabetes from the UK and China. Baseline leisure-time PA was self-reported and categorized by metabolic equivalent hours per week (MET-h/week) according to World Health Organization recommendations: none, below recommendation (>0-7.49 MET-h/week); at recommended level (7.5-14.9 MET-h/week); above recommendation (≥15 MET-h/week). Mortality and cardiovascular disease data were obtained from national registries. RESULTS: During a median follow-up of 12.4 and 9.7 years, in the UK and China cohorts, repectively, higher levels of leisure-time PA were inversely associated with all-cause (1571 and 2351 events) and cardiovascular mortality (392 and 1060 events), mostly consistent with a linear dose-response relationship. PA below, at, and above recommendations, compared with no activity, yielded all-cause mortality hazard ratios of 0.94 (95% confidence interval (95%CI): 0.79-1.12), 0.90 (95%CI: 0.74-1.10), and 0.85 (95%CI: 0.70-1.02) in British adults and 0.87 (95%CI: 0.68-1.10), 0.88 (95%CI: 0.74-1.03), and 0.77 (95%CI: 0.70-0.85) in Chinese adults. Associations with cardiovascular mortality were more pronounced in British adults (0.80 (95%CI: 0.58-1.11), 0.75 (95%CI: 0.52-1.09), and 0.69 (95%CI: 0.48-0.97)) but less pronounced in Chinese adults (1.06 (95%CI: 0.76-1.47), 1.01 (95%CI: 0.80-1.28), and 0.79 (95%CI: 0.69-0.92)). PA at recommended levels was not associated with lower rates of major adverse cardiovascular events (2345 and 4458 events). CONCLUSION: Leisure-time PA at the recommended levels was not convincingly associated with lower mortality and had no association with risk of major adverse cardiovascular events in British or Chinese adults with type 2 diabetes. Leisure-time PA above current recommendations may be needed to prevent cardiovascular disease and premature mortality in adults with type 2 diabetes.

Joint associations of device-measured physical activity and abdominal obesity with incident cardiovascular disease: a prospective cohort study.

OBJECTIVE: To examine the joint associations between physical activity and abdominal obesity with the risk of cardiovascular disease (CVD) events. METHODS: We included 70 830 UK Biobank participants (mean age±SD=61.6 ± 7.9 years; 56.4% women) with physical activity measured by wrist-worn accelerometers and without major chronic diseases. Participants were jointly categorised into six groups based on their physical activity level (tertiles of total volume and specific intensity levels) and presence or absence of abdominal obesity based on measured waist circumference. Associations with incident CVD (fatal and non-fatal events) were determined using proportional subdistribution hazard models with multivariable adjustment. RESULTS: After excluding events during the first 2 years of follow-up, participants were followed for a median of 6.8 years, during which 2795 CVD events were recorded. Compared with the low abdominal adiposity and highest tertile of physical activity, abdominal obesity was associated with higher risk of incident CVD, especially in those with low levels of vigorous-intensity physical activity (HR 1.42, 95% CI 1.22 to 1.64). Approximately 500 min per week of moderate-to-vigorous intensity and approximately 30-35 min of vigorous-intensity physical activity offset the association of abdominal obesity and the risk of having a CVD event. CONCLUSION: Physical activity equivalent to approximately 30-35 min of vigorous intensity per week appears to offset the association between abdominal obesity and incident CVD. About 15 times more physical activity of at least moderate intensity is needed to achieve similar results.

Mortality of Spanish soccer referees and coaches: a retrospective cohort study.

There is evidence that elite soccer players live longer than general population, but there is no information on soccer coaches and referees. We aimed to analyze the longevity of both professionals, comparing them with soccer players and with general population. In this retrospective cohort study, a total of 328 male Spanish soccer coaches, 287 referees, and 1230 soccer players, all born before 1950, were divided in two cohorts, matched 2:1 with coaches and referees. We compared the survival of the cohorts with the Kaplan-Meier estimator and significance with the log-rank test. We calculated hazard ratios of death for coaches and referees compared with male Spanish general population of the same period. Differences in survival among cohorts were found, but they did not reach statistical significance. The estimated median survival time was 80.1 years (95% CI 77.7-82.4) for referees, 78 years (95% CI 76.6-79.3) for coaches, 78.8 years (95% CI 77.6-80) for referees matched with players, and 76.6 years (95% CI 75.3-77.9) for coaches matched with players. Both coaches and referees had lower mortality than general population, but this advantage disappeared after 80 years of age. We found no differences in longevity among Spanish elite soccer referees, coaches and players born before 1950. Both coaches and referees had lower mortality than general population, but this advantage disappeared after 80 years of age.

Optimizing dense feed-forward neural networks.

Deep learning models have been widely used during the last decade due to their outstanding learning and abstraction capacities. However, one of the main challenges any scientist has to face using deep learning models is to establish the network's architecture. Due to this difficulty, data scientists usually build over complex models and, as a result, most of them result computationally intensive and impose a large memory footprint, generating huge costs, contributing to climate change and hindering their use in computational-limited devices. In this paper, we propose a novel dense feed-forward neural network constructing method based on pruning and transfer learning. Its performance has been thoroughly assessed in classification and regression problems. Without any accuracy loss, our approach can compress the number of parameters by more than 70%. Even further, choosing the pruning parameter carefully, most of the refined models outperform original ones. Furthermore, we have verified that our method not only identifies a better network architecture but also facilitates knowledge transfer between the original and refined models. The results obtained show that our constructing method not only helps in the design of more efficient models but also more effective ones.

Leisure-Time Physical Activity and Risk of Microvascular Complications in Individuals With Type 2 Diabetes: A UK Biobank Study.

OBJECTIVE: The aim of this study was to determine dose-response associations, including the minimal effective level, between leisure-time physical activity and risk of incident neuropathy, nephropathy, and retinopathy. RESEARCH DESIGN AND METHODS: This cohort study included 18,092 individuals with type 2 diabetes from the UK Biobank. Self-reported leisure-time physical activity was converted into MET-hours per week. Participants were categorized into no physical activity (0 MET-h/week), below recommendations (0-7.49 MET-h/week), at recommendations (7.5-14.9 MET-h/week), and above recommendations (≥15 MET-h/week). Microvascular complications were identified from hospital inpatient records using diagnosis codes. We used Cox proportional hazards regression analysis to calculate adjusted hazard ratios (aHRs) and restricted cubic splines to identify the minimal effective level of physical activity. RESULTS: During a median follow-up of 12.1 years, 672 individuals (3.7%) were diagnosed with neuropathy, 1,839 (10.2%) with nephropathy, and 2,099 (11.7%) with retinopathy. Any level of physical activity was associated with a lower risk of neuropathy and nephropathy but not retinopathy. Compared with those reporting no physical activity, the aHR of neuropathy was 0.71 (95% CI 0.53, 0.90) below recommendations, 0.73 (0.56, 0.96) at recommendations, and 0.67 (0.52, 0.87) above recommendations. Corresponding aHRs for nephropathy were 0.79 (0.68, 0.92), 0.80 (0.67, 0.95), and 0.80 (0.68, 0.95). The association with retinopathy was weaker, with aHRs of 0.91 (0.78, 1.06), 0.91 (0.77, 1.08), and 0.98 (0.84, 1.15), respectively. CONCLUSIONS: Any level of leisure-time physical activity was associated with a lower risk of neuropathy and nephropathy but not retinopathy in individuals with type 2 diabetes. For both neuropathy and nephropathy, the minimal effective physical activity level may correspond to <1.5 h of walking per week.

Body composition and mortality from middle to old age: a prospective cohort study from the UK Biobank.

BACKGROUND: How the association between adiposity and the risk of death changes with age, and which is the optimal level of adiposity to reduce mortality in older ages, is still not completely understood. We aimed to ascertain the age-specific risks of mortality associated with different measures of adiposity. METHODS: This was a prospective UK Biobank cohort study. Participants were categorized based on five different adiposity and body composition metrics. We explored the age-varying associations between body composition indices and all-cause mortality from 45 to 85 years of age at follow-up using hazard ratios (HR) from flexible parametric survival models with multivariable adjustment and age as timescale. Participants were followed from baseline (2006-2010) through 31 March 2020. RESULTS: We included 369,752 participants (mean baseline age = 56.3 ± 8.1 years; range 38.9-73.7 years; 54.1% women) and 10,660 deaths during a median follow-up of 11.4 years. Associations between body mass index and mortality were similar when using the fat mass index in magnitude and shape. Compared to participants with normal weight, overweight was not associated with the risk of death regardless of age and the adiposity measure used. Participants with obesity class I showed an HR of 1.20 (95% confidence interval [CI]: 1.08, 1.33) and 1.14 (95%CI: 0.98, 1.30) at ages 60 and 80, respectively, and participants with obesity class II an HR about 1.55 across all age. More attenuated associations with higher age were found in individuals with the highest obesity using the fat mass index. Very high lean mass was associated with an increased risk of mortality in those aged 55-75 years (HR about 1.20 across all ages). CONCLUSION: Obesity should be prevented at any age. Attenuated associations with older age were observed only among the individuals with the highest obesity, but the risk remained higher compared to normal-weight participants. Lean mass did not reduce mortality risk at any age.

Aquatic exercise for people with intellectual disabilities: findings from a systematic review.

Background: There is a need for promoting exercise practice among people with intellectual disabilities (ID). Aquatic exercise (AE) could be a viable option in this regard. Objective: To identify and critically analyze the best available evidence concerning the effects of AE in the physical and mental health of people with ID. Methods: A systematic review of randomized controlled trials (RCTs) and comparative studies was performed after searching within several databases up to March 2021. Results: A total of 4 RCTs and 3 comparative studies were found. Their methodological quality ranged from high to low. Aquatic interventions had positive effects on cardiorespiratory, muscular fitness and balance. Mixed effects were seen on parameters related to obesity and cognition. Scant information regarding feasibility and intervention fidelity was provided. In general, interventions details were not discussed in deep. Conclusion: Preliminary evidence shows that aquatic exercise can be prescribed to people with ID in order to improve their physical health. The impact of aquatic exercise on motor skills, cognitive function and mental health remains unclear. Further research on this topic should provide a detailed description of the interventions carried out, including information on the feasibility and intervention fidelity.

The Omni Scale Is Not Suitable for Assessing Self-Perceived Exertion during Physical Activity in Preschoolers.

INTRODUCTION: We aimed to identify the utility, reliability, and validity of an adapted version of the OMNI self-perceived exertion (PE) rating scale in preschoolers. POPULATION AND METHODS: Firstly, 50 (mean age ± standard deviation [SD] = 5.3 ± 0.5 years, 40% girls) performed a cardiorespiratory fitness (CRF) test twice, with a one-week interval between assessments, and rated their PE either individually or in groups. Secondly, 69 children (mean age ± SD = 4.5 ± 0.5 years, 49% girls) performed two CRF tests, separated by a one-week interval, twice and rated their self-PE. Thirdly, the heart rate (HR) of 147 children (mean age ± SD = 5.0 ± 0.6 years, 47% girls) were compared against self-rated PE after finishing the CRF test. RESULTS: Self-assessed PE differed when the scale was administered individually (e.g., 82% rated PE with 10) or in groups (42% rated PE with 10). The scale showed poor test-retest reliability (ICC:0.314-0.031). No significant associations were found between the HR and PE ratings. CONCLUSIONS: An adapted version of the OMNI scale was found not suitable for assessing self-PE in preschoolers.

Associations between Self-Perceived and Desired Health-Related Physical Fitness in Spanish Children.

Health-related physical fitness (HRPF) has emerged as an important marker of health among children. It is usually defined as a multidimensional construct consisting of cardiorespiratory endurance; muscular strength and endurance; and flexibility. Currently, health policies are aimed at getting children to increase their HRPF levels. Understanding the relationship between the perceived and the desired levels of fitness can be important to avoid the abandoning of physical activity practice. We analyzed the associations between the self-perceived and the desired health-related physical fitness. A modified version of the self-perceived HRPF questionnaire was completed by 330 children (148 girls, mean age: 10.78 ± 0.67 years, and 182 boys, mean age: 10.82 ± 0.61 years). Fitness was measured through tests selected from the Eurofit battery. The questions regarding desired HRPF showed moderate internal consistency (Cronbach's α: 0.671) and good test-retest reliability (ICC: 0.761). In general, children shared a desire to improve their self-perceived HRPF. Those who perceived themselves as already being fit were the ones who showed the strongest desire for achieving higher HRPF levels.

Estimación del aumento global del tiempo de sedentarismo durante los confinamientos de la COVID-19: una revisión sistemática y un metanálisis / Estimating the global increase in sedentary time during COVID-19 lockdowns: a systematic review and meta-analysis

FUNDAMENTOS: Las estrategias restrictivas de movilidad derivadas de la pandemia por COVID-19 podrían afectar negativamenteal estado de salud de la población debido a la disminución de los niveles de actividad física. El objetivo de este estudio es estimar elaumento del tiempo de sedentarismo durante los confinamientos en comparación con la situación anterior al brote de COVID-19 enmuestras de población adulta de diferentes países del mundo.MÉTODOS: Se realizó una búsqueda sistemática en tres bases de datos electrónicas, hasta el 27 de febrero de 2021, de estudiosque informaran sobre el tiempo total de sedentarismo antes y durante los confinamientos por COVID-19 utilizando una herramientavalidada. Se realizó un metanálisis utilizando modelos de efectos aleatorios para calcular las diferencias de medias ponderadas en eltiempo sedentario diario total antes y durante los confinamientos. El análisis se repitió estratificado y comparando por sexo.RESULTADOS: Se incluyeron 20 estudios, con una calidad metodológica buena (n=15) y regular (n=5). Para el metanálisis seagruparon los datos de 18 estudios, con 47.245 participantes. Los confinamientos por COVID-19 en todo el mundo condujeron a unaumento medio ponderado de 2,40 horas diarias en el tiempo total de comportamiento sedentario (intervalo de confianza del95%: 1,95; 2,85). El análisis estratificado y comparativo por sexo en 8 estudios indicó un aumento similar para mujeres (n=20.455) yhombres (n=11.825).CONCLUSIONES: El tiempo total de sedentarismo diario aumentó en 2,40 horas en todo el mundo durante los confinamientos encomparación con la situación anterior al brote de COVID-19, sin diferencias significativas entre sexos.(AU)

BACKGROUND: This study aimed to estimate the increase in sedentary time during the lockdowns compared to the situationbefore the COVID-19 outbreak in adult population samples from different countries worldwide.METHODS: We systematically searched three electronic databases until 27th February 2021 for studies reporting data on total seden-tary time before and during COVID-19 lockdowns using a validated tool. We performed a meta-analysis using random-effects models tocalculate weighted mean differences in total daily sedentary time before and during the lockdowns. The analysis was repeated stratifiedand compared by sex.RESULTS: We included 20 studies, with a good (n=15) and fair (n=5) methodological quality. We pooled for meta-analysis the datafrom 18 studies, comprising 47,245 participants. The COVID-19 lockdowns across the globe led to a weighted mean increase of 2.40hours per day in total sedentary behavior time (95% confidence interval: 1.95; 2.85). The stratified and comparative analysis by sex in8 studies indicated a similar increase for women (n=20,455) and men (n=11,825).CONCLUSIONS: Total daily sedentary time increased by 2.40 hours worldwide during the lockdowns compared to the situationbefore the COVID-19 outbreak, with no significant difference between sexes.(AU)

Effects of Nordic walking in people with Parkinson's disease: A systematic review and meta-analysis.

Nordic walking (NW) may be a beneficial treatment for people with Parkinson's disease (PD). Since high-quality research has been published on the effects of NW on people with PD by now, an actualised and comprehensive, in-depth review is recommended to guide practitioners in prescribing this exercise modality. The purpose of this study was to conduct a systematic review and meta-analysis on the effectiveness of NW as a rehabilitation strategy for PD. According to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, a literature search was performed using Pubmed, SportDiscus and Scopus up to May 2021. Randomised controlled trials (RCTs) addressing the impact of a NW intervention on any outcomes in people with PD were included. The critical appraisal of the RCTs was retrieved from the Physiotherapy Evidence Database (PEDro) or evaluated using the PEDro scale. The Cochrane Collaboration's risk of bias tool was also employed. The review was not registered a priori on any database and a review protocol was not published. Twelve studies were included in the review. The investigations were mostly good-to-fair methodological quality, and risk of bias was acceptable. None of the reported statistically significant benefits of NW were clinically meaningful, except for walking ability. Although adherence to NW programs was good, some adverse effects derived from its practice were informed. The practice of Nordic Walking does not lead to clinically significant changes in global motor impairment, functional mobility, balance and physical fitness in patients with PD. This therapy seems to improve walking ability and quality of life, although further research in this latter outcome is needed.

[Estimación del aumento global del tiempo de sedentarismo durante los confinamientos de la COVID-19: una revisión sistemática y un metanálisis.] / Estimating the global increase in sedentary time during COVID-19 lockdowns: a systematic review and meta-analysis.

OBJECTIVE: Las estrategias restrictivas de movilidad derivadas de la pandemia por COVID-19 podrían afectar negativamente al estado de salud de la población debido a la disminución de los niveles de actividad física. El objetivo de este estudio es estimar el aumento del tiempo de sedentarismo durante los confinamientos en comparación con la situación anterior al brote de COVID-19 en muestras de población adulta de diferentes países del mundo. METHODS: Se realizó una búsqueda sistemática en tres bases de datos electrónicas, hasta el 27 de febrero de 2021, de estudios que informaran sobre el tiempo total de sedentarismo antes y durante los confinamientos por COVID-19 utilizando una herramienta validada. Se realizó un metanálisis utilizando modelos de efectos aleatorios para calcular las diferencias de medias ponderadas en el tiempo sedentario diario total antes y durante los confinamientos. El análisis se repitió estratificado y comparando por sexo. RESULTS: Se incluyeron 20 estudios, con una calidad metodológica buena (n=15) y regular (n=5). Para el metanálisis se agruparon los datos de 18 estudios, con 47.245 participantes. Los confinamientos por COVID-19 en todo el mundo condujeron a un aumento medio ponderado de 2,40 horas diarias en el tiempo total de comportamiento sedentario (intervalo de confianza del 95%: 1,95; 2,85). El análisis estratificado y comparativo por sexo en 8 estudios indicó un aumento similar para mujeres (n=20.455) y hombres (n=11.825). CONCLUSIONS: El tiempo total de sedentarismo diario aumentó en 2,40 horas en todo el mundo durante los confinamientos en comparación con la situación anterior al brote de COVID-19, sin diferencias significativas entre sexos.

OBJETIVO: This study aimed to estimate the increase in sedentary time during the lockdowns compared to the situation before the COVID-19 outbreak in adult population samples from different countries worldwide. METODOS: We systematically searched three electronic databases until 27th February 2021 for studies reporting data on total sedentary time before and during COVID-19 lockdowns using a validated tool. We performed a meta-analysis using random-effects models to calculate weighted mean differences in total daily sedentary time before and during the lockdowns. The analysis was repeated stratified and compared by sex. RESULTADOS: We included 20 studies, with a good (n=15) and fair (n=5) methodological quality. We pooled for meta-analysis the data from 18 studies, comprising 47,245 participants. The COVID-19 lockdowns across the globe led to a weighted mean increase of 2.40 hours per day in total sedentary behavior time (95% confidence interval: 1.95; 2.85). The stratified and comparative analysis by sex in 8 studies indicated a similar increase for women (n=20,455) and men (n=11,825). CONCLUSIONES: Total daily sedentary time increased by 2.40 hours worldwide during the lockdowns compared to the situation before the COVID-19 outbreak, with no significant difference between sexes.

Do Intellectually Gifted Children Show Similar Physical Habits, Physical Fitness Levels and Self-Perceived Body Image Than Typically Developed Children?

Scientific evidence regarding whether intellectually gifted children show similar physical activity habits and physical fitness levels in comparison to typically developed children, is inconclusive. This is in part due to the scant research that has directly compared both groups of people. In this study, physical activity prevalence, self-perceived and objectively assessed physical fitness levels, and body image were assessed in a sample of 74 intellectually gifted children (mean age 11.6 ± 1.2 years). Seventy-four non-gifted children matched by age and sex were selected as a comparison cohort. Results indicated that both groups showed similar self-perceived and objectively assessed fitness levels. Physical activity habits were also similar, although significant differences were observed indicating that intellectually gifted girls were less active in comparison with non-gifted girls. Both cohorts perceived their body image accurately, although intellectually gifted children were much more satisfied with their physical appearance.

Upper versus lower body resistance exercise with elastic bands: effects on cognitive and physical function of institutionalized older adults.

PURPOSE: To compare the effects of upper versus the lower-body resistance exercise on cognitive and physical functions of institutionalized older people. METHODS: This was a non-randomized multi-center comparative and crossover study (clincialtrials.gov code NCT03831373). Two experimental groups performed a 12-week intervention of resistance exercises with low-intensity elastic bands, one program focused on exercises of the upper body (n = 20, mean age 87.6 ± 6.4 years, 75% women) and the other on the lower body (n = 29, mean age 81.4 ± 7.7 years, 55% women). Following 12 weeks of detraining, the groups performed the other intervention. After another 12 weeks, a follow-up assessment was carried. The control group (n = 19, mean age 81.3 ± 9.5, 68% women) performed a full body stretching exercise program in both phases. Before and after each period, cognitive and physical function was assessed by standardized test (Mini-Mental State Examination, Trail Making test and Phototest; Timed Up and Go, Back Scratch, Chair Sit and Reach and had grip strength, respectively). Intention-to-treat and per-protocol analyses were carried. RESULTS: After the first intervention, significant improvements (p < 0.05) were observed in the cognitive function in both experimental groups, and in the hand grip strength in the group that performed lower-body exercise. After the second phase, all groups showed improvements in lower-body and shoulder flexibility and a significant worsening in hand grip strength. The lower-body exercise group showed a worsening in cognitive function, and the upper-body group in functional mobility and dynamic balance. CONCLUSIONS: Resistance exercise with elastic bands showed beneficial effects on cognitive function and functional independence in institutionalized older adults. While upper body exercises seemed to be more effective on cognitive function, lower limb exercises showed better results on physical function parameters.