Olympic Games and 24-hour movement behaviors:A match worth making

1.Background The Olympic motto,"Faster,Higher,Stronger-Together",represents the pursuit of athletic excellence,united as a global community."Excellence,respect and friendship"are the Olympic values.Both the motto and values are multifaceted and holistic in nature,and all-encompassing in their reach while recognizing no single entity rises above the others.Collectively,these foundational statements anchor the Olympic movement in its quest to build a better world through sport.

Towards precision 24-hour movement behavior recommendations—The next new paradigm?

1.Background The importance of physical activity(PA)for health is unequivocal.^(1)Accordingly,population-based recommendations for exercise,and more recently public health guidelines for PA,have been developed and released by authoritative groups for many decades.^(2)Such guidelines emerged with leadership from the exercise physiology discipline and were rooted in,and loyal to,the importance of moderate-to-vigorous intensity PA(MVPA)or exercise.

Muscle strength and its association with cardiometabolic variables in adolescents:does the expression of muscle strength values matter?

Background We investigate the association between different muscle strength(MS)indices with cardiometabolic variables in adolescents.Methods Cross-sectional study comprising 351 adolescents(male 44.4%,age 16.6±1.0 years)from Brazil.MS was assessed by handgrip strength and analyzed in live difrerent ways:absolute MS and MS normalized for body weight,body mass index(BMI),height,and fat mass,respectively.Cardiometabolic variables investigated as outcomes were systolic and diastolic blood pressure(DBP),waist circumference(WC),high-sensitive C-reactive protein(hs-CRP),lipid and glucose metabolism markers.Multiple linear regression models adjusted for confounding factors were used.Results Absolute MS and/or MS normalized for height was directly associated with WC[up to 32.8 cm.standard error(SE)=4.7]and DBP(up to 8.8 mmHg,SE=0.8),and inversely associated with high-density lipoprotein cholesterol(up to-8.0 mg/dL.SE=14.1).MS normalized for body weight.BMI or fat inass was inversely associated with WC(up to-17.5 cm,SE=2.2).According tesex,MS normalized for fat mass was inversely associated with triglycerides(male:0.02 times lower,SE=0.01;female:0.05 times lower,SE=0.01)and homeostatic model assessment for insulin resistance(male:0.02 times lower,SE=0.01;female:0.06 times lower.SE=0.01).and inversely associated with hs-CRP only among male(0.03 times lower,SE=0.01).Conclusion When normalized for body weight,BMI or fat mass,MS was superior to absolute MS or MS normalized for height in representing adequately cardiometabolic variables among adolescents.

Association of sleep quality with sociodemographic factors and lifestyle in adolescents from southern Brazil

Background Good sleep quality is an essential component for growth, development, and physical and mental health of the individual, in addition to being a positive indicator of health and well-being. The objective of this study was to estimate the prevalence of poor sleep quality and to identify the association of poor sleep quality with sociodemographic factors, lifestyle, weight status, and associated aerobic fitness in adolescents. Methods This study included 1110 students aged 14–19 years from city of S?o José/SC, Brazil. Sleep quality of the subjects was assessed using a questionnaire and classified as adequate and low. Independent variables were gender, age, monthly household income, maternal education, school shift, global physical activity, proper diet, screen time, sleeping hours of full week, sleeping hours of weekdays, sleeping hours of weekends, weight status, and aerobic fitness. Binary logistic regression was used to estimate odds ratios and confidence intervals of 95%. Results Prevalence of poor sleep quality was 60.4%. More likely to have poor sleep quality were identified in female students (OR 1.68, 95% CI 1.11–2.55), whose mothers had higher levels of education (OR 1.44, 95% CI 1.20–1.73) and low aerobic fitness (OR 1.80, 95% CI 1.02–3.19). Conclusion Adolescents who were most likely to report poor sleep quality were female, those whose mothers had a higher educational level and had low aerobic fitness. Students with sedentary risk behavior were less likely of reporting poor sleep quality.

Prevalence and factors associated with stages of behavior change for physical activity in adolescents:a systematic review

Background:To analyze prevalence and factors associated with stages of behavior change for physical activity in adolescents.Data sources:A search was performed in SciELO,PubMed,PsycINFO,SPORTDiscus and LILACS.The search terms were 'behavior change' OR 'stages of change' OR 'stages of readiness' OR 'readiness to change' OR 'transtheoretical model' OR 'process to change' OR 'decisional balance',and 'motor activity' OR 'physical activity' OR 'physical exercise' and 'adolescent' OR 'students'.After the eligibility criteria,18 articles were selected.Results:The highest prevalence of adolescents in the precontemplation,contemplation,and preparation stages was found in the Germany,South Korea,and Iran while there were more adolescents in the action and maintenance in South Korea and Brazil.The evidence of association indicated that females are more likely to be in precontemplation,contemplation and preparation.The evidence was inconclusive for age (in relation to the precontemplation,contemplation,action and maintenance stages),economic status (all stages),shift of study (when stratified by gender) and body composition (all stages).No association was found with parental level of education.Conclusion:The findings can help to guide interventions and further research on the topic of behavior changes for physical activity in adolescents.