BACKGROUND: Little is known about the combined effect of physical activity (PA), recreational screen time (ST), and sleep in preventing childhood obesity. Hence, this study aimed to analyze the associations between meeting the PA, ST, and sleep recommendations within the 24-hour movement guidelines and adiposity indicators among children and adolescents. METHODS: A total of 679 children and adolescents aged 8-18 years were included. The time spent in moderate-to-vigorous PA and the sleep duration were estimated from raw data from a wrist-worn accelerometer. Recreational ST was reported by the child or parent. Body mass index (BMI) z-score, fat mass percentage (FM%), and visceral adipose tissue (VAT) were used as adiposity indicators. Participants with ≥ 60 min/day of moderate-to-vigorous PA, < 2 h/day of recreational ST, and uninterrupted sleep for 9-11 h/day (for children) or 8-10 h/day (for adolescents) were considered to meet the overall 24-hour movement guidelines. RESULTS: Meeting the ST only recommendation was associated with reduced odds of a high BMI z-score (odds ratio [OR] = 0.38, 95% confidence interval [CI]: 0.17-0.89), excess FM% (OR = 0.34, 95% CI: 0.13-0.93), and excess VAT (OR = 0.27, 95% CI: 0.10-0.74) in adolescents. Significantly reduced odds of a high BMI z-score was associated with meeting the combination of the ST and sleep recommendations (OR = 0.11, 95% CI: 0.01-0.89). Adolescents who met one recommendation (OR = 0.51, 95% CI: 0.27-0.96) or any two recommendations (OR = 0.33, 95% CI: 0.11-0.94) had reduced ORs of having a high BMI z-score. Adolescents had lower odds of having excess VAT if they met one recommendation (OR = 0.39, 95% CI: 0.19-0.81) or any two recommendations (OR = 0.25, 95% CI: 0.07-0.90). No significant associations were found in children. CONCLUSIONS: The present study showed no associations between meeting all three recommendations within the 24-hour movement guidelines and adiposity indicators. However, meeting ST only recommendation and the combination of the ST and sleep recommendations was associated with a reduced risk of excess adiposity. This finding should be considered when designing effective strategies and interventions to prevent childhood obesity.
- MeSH
- adipozita MeSH
- akcelerometrie MeSH
- čas strávený před obrazovkou * MeSH
- chování snižující riziko MeSH
- cvičení * MeSH
- dítě MeSH
- dodržování směrnic statistika a číselné údaje MeSH
- index tělesné hmotnosti MeSH
- lidé MeSH
- mladiství MeSH
- obezita dětí a dospívajících diagnóza prevence a kontrola MeSH
- odds ratio MeSH
- průřezové studie MeSH
- sedavý životní styl MeSH
- spánek * MeSH
- Check Tag
- dítě MeSH
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
The traditional concept of education and school settings significantly contribute to the sedentary behavior of adolescents at secondary schools. The aim of this study is to identify the volume and intensity of physical activity (PA) that adolescent boys and girls engage in during recesses, after school, and during the day to compensate for sedentary behavior in lessons. The study was conducted at 29 Czech and 9 Polish schools. The study involved 868 girls and 409 boys aged 15-17 years. An ActiTrainerTM accelerometer was used to monitor PA and heart rate. Participants were divided into four quartile groups. Most sedentary boys and girls had less PA and showed a worse ratio of physical inactivity (PI)/PA than non-sedentary participants during recesses. In the after-school period, there were no significant differences. On school days, most sedentary boys and girls showed lower PA, a worse ratio of PI/PA, fewer steps·hour-1, and lower energy expenditure than their non-sedentary counterparts. Vigorous PA of ≥8 METs was reached by 48% of most sedentary boys (75% non-sedentary) and 47% of most sedentary girls (54% non-sedentary). Most sedentary adolescents do not compensate for their sedentary behavior in lessons with higher PA intensity or volume during recesses, after-school, or in overall daily PA.
- MeSH
- cvičení * MeSH
- energetický metabolismus MeSH
- lidé MeSH
- mladiství MeSH
- sedavý životní styl * MeSH
- školy MeSH
- Check Tag
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Geografické názvy
- Česká republika MeSH
- Polsko MeSH
Východiska: Předchozí zahraniční výzkumy potvrdily validitu a schopnost dotazníku Youth Activity Profile (YAP) poskytnout přesný odhad pohybové aktivity (PA) a sedavého chování (SCH) na skupinové bázi. Cíle: Zjistit validitu mezi nově aktualizovaným algoritmem používaným ve Spojených státech amerických pro vyhodnocení dotazníku YAP a hodnotami naměřenými akcelerometrem na vzorku českých dětí a mládeže. Metodika: Výzkumný soubor zahrnoval 558 participantů ze sedmi škol situovaných ve středně velkých městech, z nichž bylo 254 chlapců (13,94 ± 2,84 let) a 313 dívek (14,06 ± 2,91 let). Participanti nosili akcelerometr ActiGraph na zápěstí nedominantní paže po dobu jednoho týdne. Poté ve škole vyplnili českou verzi dotazníku YAP za účelem zjištění úrovně PA ve škole, po škole a SCH. Údaje z dotazníku byly pomocí predikčního algoritmu převedeny na odhad minut strávených PA a SCH. Hrubá data z akcelerometru byla zpracována v programu R pomocí metody GGIR. Z obou nástrojů byly získány souhrnné hodnoty za pracovní a víkendové dny. Pro vyhodnocení míry shody mezi nástroji byl jak na celkové úrovni, tak i v rámci pohlaví a stupňů školního vzdělávání vypočítán Spearmanův korelační koeficient a mediánová absolutní procentuální chyba (MdAPE) a proveden test ekvivalence. Výsledky: Korelace mezi nástroji se pohybovala v rozmezí 0,23-0,50 v pracovních a 0,23-0,58 ve víkendových dnech. Hodnoty MdAPE dosahovaly rozmezí 0,9 % až 37,9 % v pracovních a 7,7 až 59,0 % ve víkendových dnech. Míra shody ve víkendových dnech měla tendenci se postupně s věkem snižovat. Rozdíly mezi oběma nástroji byly u obou proměnných menší u dívek než u chlapců. Test ekvivalence zjistil, že 10% shoda mezi oběma nástroji byla častější v pracovních než ve víkendových dnech. Závěry: Výsledky poskytují předběžné důkazy o validitě algoritmu pro odhad PA a SCH z dotazníku YAP, a to napříč kulturním prostředím. Kalibrace algoritmu se zaměřením na české prostředí je však nezbytná.
Background: Previous research has supported the validity and utility of the Youth Activity Profile (YAP) for providing accurate group-level estimates of physical activity (PA) and sedentary behavior (SB) in youth. Objective: The present study evaluated the cross-cultural validity between the newly refined algorithms from the U.S. and accelerometry data in a sample of youth from the Czech Republic. Methods: Data sample consist of 558 youth from 7 schools in a mid-sized metropolitan area. The sample included 254 males (13.94 ± 2.84 years) and 313 females (14.06 ± 2.91 years). Participants wore an ActiGraph accelerometer on non-dominant wrist for a full week and then completed a Czech version of the YAP at school to report PA levels in school, outside of school and SB. The raw YAP data were converted into estimates of PA and SB using the prediction algorithms. Raw accelerometer data were processed using the R-based GGIR package. Estimates of MVPA minutes per day and averages were computed for weekdays and weekends from both tools. Agreement was examined separately for males and females and for distinct age groups using Spearman's correlations, Median Absolute Percent Error (MdAPE) and equivalence testing. Results: Correlations between the YAP and the accelerometer ranged from 0.23 to 0.50 for weekday and from 0.23 to 0.58 for weekend estimates. The MdAPE values ranged from 0.9 % to 37.9 % for weekday and from 7.7 % to 59.0 % for weekend estimates. Error rates tended to be higher for the younger group than the older group on weekend estimates. Girls' estimates show less error rates than boys' in both variables. Equivalence testing results revealed that estimates of PA were in the 10% equivalence zone more for weekdays than for weekends. Conclusions: Results provide preliminary evidence to support the cross-cultural validity of the YAP for estimating PA and SB in youth. Improvements in accuracy with country-specific calibration approaches is needed.
