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.
Neighborhood environmental attributes have been found to be associated with residents' time spent walking and in physical activity, in studies from single countries and in multiple-country investigations. There are, however, mixed findings on such environmental relationships with sedentary (sitting) time, which primarily have used evidence derived from single-country investigations with self-reported behavioral outcome measures. We examined potential relationships of neighborhood environmental attributes with objectively-assessed sedentary time using data from 5712 adults recruited from higher and lower socio-economic status neighborhoods in 12 sites in 10 countries, between 2002 and 2011. Ten perceived neighborhood attributes, derived from an internationally-validated scale, were assessed by questionnaire. Sedentary time was derived from hip-worn accelerometer data. Associations of individual environmental attributes and a composite environmental index with sedentary time were estimated using generalized additive mixed models. In fully adjusted models, higher street connectivity was significantly related to lower sedentary time. Residential density, pedestrian infrastructure and safety, and lack of barriers to walking were related to higher sedentary time. Aesthetics and safety from crime were related to less sedentary time in women only. The predicted difference in sedentary time between those with the minimum versus maximum composite environmental index values was 71 min/day. Overall, certain built environment attributes, including street connectivity, land use mix and aesthetics were found to be related to sedentary behavior in both expected and unexpected directions. Further research using context-specific measures of sedentary time is required to improve understanding of the potential role of built environment characteristics as influences on adults' sedentary behavior.
- MeSH
- akcelerometrie statistika a číselné údaje MeSH
- časové faktory MeSH
- celosvětové zdraví MeSH
- charakteristiky bydlení statistika a číselné údaje MeSH
- chůze statistika a číselné údaje MeSH
- cvičení MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladý dospělý MeSH
- průřezové studie MeSH
- průzkumy a dotazníky MeSH
- sedavý životní styl * MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- vytvořené prostředí statistika a číselné údaje MeSH
- zpráva o sobě MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Research Support, N.I.H., Extramural MeSH
- Research Support, U.S. Gov't, P.H.S. MeSH
Východiska: Lokomoci osob s poraněním páteřní míchy v oblasti Th1–L2 zajišťuje především manuální pohon invalidního vozíku. Metodika měření objemu a intenzity jejich pohybové aktivity pomocí akcelerometru ActiGraph GT3X+ není dosud jednotně stanovena. Cíle: Hlavním cílem bylo charakterizovat vliv dominance horní končetiny u paraplegických osob na hodnocení objemu pohybové aktivity měřené pomocí akcelerometru ActiGraph GT3X+ v habituálních podmínkách. Vedlejším cílem studie bylo nalezení optimálního místa fixace akcelerometru ActiGraph GT3+ v průběhu měření. Metodika: Studie se zúčastnilo 14 probandů (3 ženy a 11 mužů), všichni s dominantní pravou horní končetinou. V průběhu jednoho dne měl každý z probandů upnut jeden třívektorový akcelerometr ActiGraph GT3X+ na dorzální straně zápěstí nedominantní horní končetiny, druhý na dorzální straně dominantní horní končetiny a třetí na straně nedominantní horní končetiny v oblasti pasu. V první variantě byla statisticky vyhodnocena data, která byla ponechána v surovém stavu. Ve druhé variantě byla data před statistickým zpracováním převedena na hodnoty aktivního energetického výdeje. Výsledky: Analýza výsledků prokázala nejednoznačnou dominanci pravé horní končetiny u pravorukých probandů v průběhu měření habituální pohybové aktivity. Statisticky nejvýznamnější korelační shoda byla zjištěna mezi objemy surových dat z akcelerometrů upnutých na nedominantních horních končetinách s akcelerometry upnutými v pase (0,737; p≤0,01). Závěry: Za optimální místo fixace akcelerometru ActiGraph GT3X+ pro snímání habituální pohybové aktivity paraplegiků bylo určeno zápěstí nedominantní horní končetiny.
Background: Mobility of persons with spinal cord injury in Th1-L2 area is primarily assured by manual wheelchair propulsion. It has not been exactly determined yet which methods have to be used to evaluate the volume and the intensity of their physical activity. Objective: The principal aim of this study was to characterize the influence of upper limb dominance in paraplegic persons on the evaluation of the volume of physical activity measured with the ActiGraph GT3X+ accelerometer in habitual conditions. The secondary aim was to determine the optimal fixation position of the accelerometer during the measurement of the habitual physical activity. Methods: The study involved 14 subjects, 3 women and 11 men, all of them with a dominant right upper limb. Each of them wore three accelerometers simultaneously, one each on the non-dominant wrist and dominant wrist and one on the waist on course of one day. The data obtained from the accelerometers were used in raw, not adapted numbers. In the second version, the data were calculated as units of active energy output. Results: The results showed arguable dominance of the right upper limbs during physical activity in habitual conditions. The results of the correlation match indicated the highest similarity between the raw data obtained from accelerometers fixed in the waist with the data from accelerometers fixed in the wrist of the non-dominant upper limb 0,737 (p ≤ 0,01). Conclusions: The wrist of the non-dominant upper limb was determined as the optimal fixation point for the ActiGraph GT3X+ accelerometer for reading the habitual physical activity of paraplegics.
BACKGROUND: To more accurately quantify the potential impact of the neighbourhood environment on adults' physical activity (PA), it is important to compare environment-PA associations between periods of the day or week when adults are more versus less likely to be in their neighbourhood and utilise its PA resources. We examined whether, among adults from 10 countries, associations between objectively-assessed neighbourhood environment attributes and moderate-to-vigorous physical activity (MVPA) varied by time of the day and day of the week. The secondary aim was to examine whether such associations varied by employment status, gender and city. METHODS: This cross-sectional study included 6,712 adults from 14 cities across 10 countries with ≥1 day of valid accelerometer-assessed MVPA and complete information on socio-demographic and objectively-assessed environmental characteristics within 0.5 and 1 km street-network buffers around the home. Accelerometer measures (MVPA min/h) were created for six time periods from early morning until late evening/night, for weekdays and weekend days separately. Associations were estimated using generalized additive mixed models. RESULTS: Time of the day, day of week, gender and employment status were significant moderators of environment-MVPA associations. Land use mix was positively associated with MVPA in women who were employed and in men irrespective of their employment status. The positive associations between MVPA and net residential density, intersection density and land use mix were stronger in the mornings of weekdays and the afternoon/evening periods of both weekdays and weekend days. Associations between number of parks and MVPA were stronger in the mornings and afternoon/evenings irrespective of day of the week. Public transport density showed consistent positive associations with MVPA during weekends, while stronger effects on weekdays were observed in the morning and early evenings. CONCLUSIONS: This study suggests that space and time constraints in adults' daily activities are important factors that determine the impact of neighbourhood attributes on PA. Consideration of time-specific associations is important to better characterise the magnitude of the effects of the neighbourhood environment on PA. Future research will need to examine the contribution of built environment characteristics of areas surrounding other types of daily life centres (e.g., workplaces) to explaining adults' PA at specific times of the day.
- MeSH
- akcelerometrie statistika a číselné údaje MeSH
- čas MeSH
- charakteristiky bydlení statistika a číselné údaje MeSH
- cvičení fyziologie MeSH
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- periodicita * MeSH
- průřezové studie MeSH
- reprodukovatelnost výsledků MeSH
- rozložení podle pohlaví MeSH
- senioři MeSH
- velkoměsta statistika a číselné údaje MeSH
- zaměstnanost statistika a číselné údaje MeSH
- životní prostředí - projekt statistika a číselné údaje MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladiství MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- Geografické názvy
- velkoměsta statistika a číselné údaje MeSH
BACKGROUND: This study investigates school lifestyle among adolescents in terms of physical activity (PA) structure: (1) adolescents participating in a physical education lesson (PEL) versus (2) aggregate recess time exceeding 60 minutes. METHODS: The research was conducted in 24 secondary schools in the Czech Republic (boys N = 208, girls N = 433). For the whole day (1-3 days) participants wore the ActiTrainer accelerometer, which monitored PA, and heart rate. A total of 1122 school days were recorded. RESULTS: Both boys and girls participating in a PEL reported significantly better results compared with nonparticipating individuals regarding all indicators of volume and intensity of school PA (SPA). In most SPA indicators, longer aggregate recess time (>60 minutes) had a statistically significant effect, particularly on the volume of SPA. The recommended 500 steps/hours for SPA was achieved by 83% of boys participating in PEL and 69% of girls. In contrast just 32% of nonparticipating boys and 31% of girls reached this level. With longer recess time the recommendation was met by 43% of boys (42% of girls) compared with 26% of boys (23% of girls) with shorter recess time. CONCLUSIONS: An increase in SPA and an improved lifestyle in adolescents on school days are significantly supported more by PELs than by longer recess time.
- MeSH
- akcelerometrie statistika a číselné údaje MeSH
- analýza rozptylu MeSH
- bazální metabolismus MeSH
- chování mladistvých * MeSH
- cvičení fyziologie MeSH
- dodržování směrnic MeSH
- lidé MeSH
- mladiství MeSH
- pohybová aktivita fyziologie MeSH
- rekreace * MeSH
- rozložení podle pohlaví MeSH
- sedavý životní styl MeSH
- školy MeSH
- studenti MeSH
- tělesná výchova statistika a číselné údaje MeSH
- zdravotní politika MeSH
- Check Tag
- lidé MeSH
- mladiství MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- Geografické názvy
- Česká republika MeSH
BACKGROUND: Physical activity (PA) has been consistently implicated in the etiology of obesity, whereas recent evidence on the importance of sedentary time remains inconsistent. Understanding of dose-response associations of PA and sedentary time with overweight and obesity in adults can be improved with large-scale studies using objective measures of PA and sedentary time. The purpose of this study was to examine the strength, direction and shape of dose-response associations of accelerometer-based PA and sedentary time with body mass index (BMI) and weight status in 10 countries, and the moderating effects of study site and gender. METHODS: Data from the International Physical activity and the Environment Network (IPEN) Adult study were used. IPEN Adult is an observational multi-country cross-sectional study, and 12 sites in 10 countries are included. Participants wore an accelerometer for seven consecutive days, completed a socio-demographic questionnaire and reported height and weight. In total, 5712 adults (18-65 years) were included in the analyses. Generalized additive mixed models, conducted in R, were used to estimate the strength and shape of the associations. RESULTS: A curvilinear relationship of accelerometer-based moderate-to-vigorous PA and total counts per minute with BMI and the probability of being overweight/obese was identified. The associations were negative, but weakened at higher levels of moderate-to-vigorous PA (>50 min per day) and higher counts per minute. No associations between sedentary time and weight outcomes were found. Complex site- and gender-specific findings were revealed for BMI, but not for weight status. CONCLUSIONS: On the basis of these results, the current Institute of Medicine recommendation of 60 min per day of moderate-to-vigorous PA to prevent weight gain in normal-weight adults was supported. No relationship between sedentary time and the weight outcomes was present, calling for further examination. If moderator findings are confirmed, the relationship between PA and BMI may be country- and gender-dependent, which could have important implications for country-specific health guidelines.
- MeSH
- akcelerometrie statistika a číselné údaje MeSH
- dospělí MeSH
- index tělesné hmotnosti MeSH
- lékařská praxe založená na důkazech statistika a číselné údaje MeSH
- lidé středního věku MeSH
- lidé MeSH
- obezita epidemiologie etiologie MeSH
- podpora zdraví * MeSH
- pohybová aktivita * MeSH
- průřezové studie MeSH
- průzkumy a dotazníky MeSH
- sedavý životní styl * MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- multicentrická studie MeSH
- pozorovací studie MeSH
- práce podpořená grantem MeSH
- Research Support, N.I.H., Extramural MeSH
