The use of wearable resistance and weighted vest for sprint performance and kinematics: a systematic review and meta-analysis.

Wearable resistance (WR) and weighted vests (WV) can be used in almost all training conditions to enhance sprint performance; however, positioning and additional mass are different in WV and WR strategies, affecting performance and kinematics differently. We aimed to systematically review the literature, searching for intervention studies that reported the acute or chronic kinematic and performance impact of WV and WR and comparing them. We analyzed Pubmed, Embase, Scopus, and SPORTDiscuss databases for longitudinal and cross-over studies investigating sprint performance or kinematics using an inverse-variance with a random-effect method for meta-analysis. After the eligibility assessment, 25 studies were included in the meta-analysis. Cross-over WR and WV studies found significantly higher sprint times and higher ground contact times (CT) compared to unloaded (UL) conditions. However, WR presented a lower step frequency (SF) compared to UL, whereas WV presented a lower step length (SL). Only one study investigated the chronic adaptations for WR, indicating a superiority of the WR group on sprint time compared to the control group. However, no difference was found chronically for WV regarding sprint time, CT, and flight time (FT). Our findings suggest that using WV and WR in field sports demonstrates overload sprint gesture through kinematic changes, however, WR can be more suitable for SF-reliant athletes and WV for SL-reliant athletes. Although promising for chronic performance improvement, coaches and athletes should carefully consider WV and WR use since there is no supporting evidence that WV or WR will impact sprint performance, CT, and FT.

The Percentage of Total and Regional Fat Is Negatively Correlated with Performance in Judo.

This study investigated the associations between total and regional body composition with performance in the special judo fitness test (SJFT), as well as strength and power tests (countermovement vertical jump-CMJ, squat jump-SJ, plyometric push-up-PPU, and force push-up-FPU). Twenty-three high-level judo athletes participated in this study. Initially, they underwent dual-energy X-ray absorptiometry, after which they performed the CMJ, SJ, PPU, and FPU tests. On another day, the SJFT was carried out. Correlations were tested using Pearson's test. The performance in the SJFT was correlated with the total and arm %fat mass (r = -0.759), torso fat mass (r = -0.802), torso %fat mass (r = -0.822) and in the lower limb regions with the leg fat mass (r = -0.803) and leg %fat (r = -0.745). In the strength and power tests, there were also negative correlations observed between regional fat and performance. There was a negative correlation between the percentage of total fat and performance in the SJFT (r = -0.824), SJ (r = -0.750), CMJ (r = -0.742), PPU (r = -0.609), and FPU (r = -0.736). Fat, both total fat and regional fat in the arms, torso, and legs, is strongly correlated with a poor performance in the SJFT and poor strength and power.

Fatores socioeconômicos, hábitos de vida e saúde de mulheres idosas com e sem vivência sexual em um município no interior de Minas Gerais / Socialeconomic factors, lifestyle habits, and the health of older women with and without sexual experience in a municipality in the interior of Minas Gerais

Resumo Objetivo avaliar e comparar fatores socioeconômicos, hábitos de vida e saúde de mulheres idosas com e sem vivência sexual. Método Pesquisa quantitativa, analítica, observacional e transversal de base populacional. As participantes foram divididas em dois grupos: grupo CVS - com vivência sexual e grupo SVS - sem vivência sexual, por meio da pergunta: "Você tem vida sexual ativa?". Foram analisadas variáveis socioeconômicas, sono, comorbidades e nível de atividade física através de uma questão do SRQ-20, uma lista baseada no Índice de Capacidade para o Trabalho e o IPAQ versão longa, respectivamente. A análise descritiva foi realizada com uso de frequências absolutas e percentuais. O teste U de Mann Whitney, teste qui-quadrado e regressão linear múltipla consideraram nível de significância de p<0,05. Resultados a amostra totalizou 494 idosas, 100 delas do grupo CVS. Ter um companheiro fixo (p<0,0001), idade menos avançada (p<0,0001), renda familiar mais alta (p<0,0001), tempo de atividade física vigorosa (p=0,005) e caminhada (p<0,0001) foram fatores significativos e positivos quanto a continuidade da vivência sexual na amostra analisada. Conclusão O estudo identificou diferenças significativas quando comparados os grupos demonstrando a influência dos fatores socioeconômicos e de saúde na expressão da sexualidade de mulheres idosas, destacando os desafios enfrentados. Políticas públicas e ações de educação em saúde são necessárias para garantir direitos, dignidade e promover mudanças positivas na vida dessa população.

Abstract Objective To assess and compare socioeconomic factors, lifestyle habits, and the health of older women with and without sexual experience. Method A quantitative, analytical, observational, and cross-sectional population-based study was conducted. Participants were divided into two groups: the CVS group (with sexual experience) and the SVS group (without sexual experience), based on the question: "Do you have an active sexual life?". Socioeconomic variables, sleep patterns, comorbidities, and the level of physical activity were analyzed using a question from the SRQ-20, a list based on the Work Ability Index, and the long version of the IPAQ, respectively. Descriptive analysis was performed using absolute frequencies and percentages. Mann-Whitney U test, chi-square test, and multiple linear regression were used with a significance level set at p<0.05. Results The total sample consisted of 494 older women, with 100 of them in the CVS group. Having a stable partner (p<0.0001), a younger age (p<0.0001), higher family income (p<0.0001), duration of vigorous physical activity (p=0.005), and walking (p<0.0001) were significant and positive factors for continued sexual experience in the analyzed sample. Conclusion The study identified significant differences when comparing the groups, highlighting the influence of socioeconomic and health factors on the expression of sexuality in older women, thus emphasizing the challenges they face. Public policies and health education initiatives are necessary to safeguard rights, dignity, and promote positive changes in the lives of this population.

Pedometers and Accelerometers in Multiple Sclerosis: Current and New Applications.

Pedometers and accelerometers have become commonplace for the assessment of physical behaviors (e.g., physical activity and sedentary behavior) in multiple sclerosis (MS) research. Current common applications include the measurement of steps taken and the classification of physical activity intensity, as well as sedentary behavior, using cut-points methods. The existing knowledge and applications, coupled with technological advances, have spawned new opportunities for using those motion sensors in persons with MS, and these include the utilization of the data as biomarkers of disease severity and progression, perhaps in clinical practice. Herein, we discuss the current state of knowledge on the validity and applications of pedometers and accelerometers in MS, as well as new opportunities and strategies for the improved assessment of physical behaviors and disease progression, and consequently, personalized care.

Sedentary postmenopausal women not undergoing hormone replacement therapy can have their blood pressure lowered by performing resistance training: a systematic review and meta-analysis of randomized controlled trials

Abstract Aim: This systematic review and meta-analysis aimed at examining the literature regarding the effects of resistance training (RT) on blood pressure (BP) in postmenopausal women. Methods: The Pubmed, Scopus, Embase, and BVS databases were accessed by two independent reviewers between July 2020, and June 2021 to search for studies that investigated the effects of RT on BP. The eligibility criteria were determined by the PICOT strategy. P: postmenopausal women, I: RT, in which training variables are presented, C: presence of a control group that does not receive any type of intervention, O: BP measured in both groups, at least before and after the intervention, T: randomized controlled trial. For the studies included in the meta-analysis, we calculated the effects sizes based on the net changes in the systolic (SBP) and diastolic (DBP) BP for a random effect model with a confidence interval of 95% and a statistical significance of p < 0.05. Results: The RT group presented a significantly lower SBP (−7.25 mmHg [95% CI: −14.04, −0.45], p = 0.04), while DBP was not statistically significantly different compared to controlled conditions (−2.54 mmHg [95% CI: −5.52, 0.44], p = 0.09). Conclusions: Physically-inactive postmenopausal women who did not take hormone replacement but performed RT exercise had a lower BP value when compared to the control group.