Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Physical Activity Tracking in Iowa Bone Development Study Youth: Alignment by Biological versus Chronological Age
Ist Teil von
Medicine and science in sports and exercise, 2012-05, Vol.44 (5S), p.655-655
Erscheinungsjahr
2012
Quelle
RCN full-text journals@Ovid
Beschreibungen/Notizen
PURPOSE: To compare the tracking of childhood and adolescent objectively-measured physical activity (PA) using peak height velocity (PHV) as a predicted measure of biological age (BA) versus chronological age (CA, yr). To investigate whether known gender differences in PA trajectories were altered after aligning by BA instead of CA. METHODS: The Iowa Bone Development Study has collected longitudinal ActiGraph data at ages 5, 9, 11, 13, and 15 yr. To be included in this analysis, participants had to have worn an accelerometer at least two measurement periods (N = 112 girls; N = 96 boys). Spearman correlation coefficients were used to determine two-year intervals of tracking of moderate to vigorous PA (MVPA) before and after maturity (PHV). Gender-specific MVPA trajectories were compared using mixed models with autoregressive residual covariance. RESULTS: Moderate two-year tracking associations were present, except the -1 yr PHV to +1 yr PHV in boys. The mixed models indicate MVPA was highest at age 5 and then declined in girls. Boys' MVPA increased until 9 yr and then decreased at a faster rate than girls. A significant interaction between age and gender confirmed the different trajectories. By 2.5 to 3 yr post PHV girls and boys had similar levels of MVPA. CONCLUSIONS: Exploring opportunity, availability, and support of MVPA in boys and girls may help explain why levels are decreasing with age. Further research into the immediate time period surrounding PHV appears warranted in boys.
Sprache
Englisch
Identifikatoren
ISSN: 0195-9131
Titel-ID: cdi_proquest_miscellaneous_1717492516
Format
–
Weiterführende Literatur
Empfehlungen zum selben Thema automatisch vorgeschlagen von bX