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The associations of physical activity, sedentary time, and sleep with V˙O2max in trained and untrained children and adolescents: A novel five-part compositional analysis
PLOS ONE, Volume: 18, Issue: 3, Start page: e0275557
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Copyright: © 2023 Runacres et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.Download (553.96KB)
The benefits of physical activity (PA) and the negative impacts of sedentary time (SED) on both short- and long-term health in youth are well established. However, uncertainty remains about how PA and SED jointly influence maximal oxygen uptake (V̇O2max). Therefore, the aim of this study was to dete...
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The benefits of physical activity (PA) and the negative impacts of sedentary time (SED) on both short- and long-term health in youth are well established. However, uncertainty remains about how PA and SED jointly influence maximal oxygen uptake (V̇O2max). Therefore, the aim of this study was to determine the joint influence of PA and SED on V̇O2max using compositional analyses. 176 adolescents (84 girls, 13.8 ± 1.8 years) completed an incremental ramp test and supramaximal validation bout on a cycle ergometer, with PA and SED recorded for seven consecutive days on the right hip using a ActiGraph GT3X accelerometer. Time spent in Sleep, SED, light, moderate and vigorous PA was analysed using a compositional linear regression model. Compositions with 10 minutes more time in vigorous PA (> 27.5 mins⋅day-1) compared to the average 17.5 mins⋅day-1 were associated with a + 2.9% - 11.1% higher absolute and scaled V̇O2max whilst compositions with less (> -10 mins⋅day-1) VPA were associated with a reduced absolute and allometrically scaled V̇O2max (-4.6% - 24.4%). All associations were irrespective of sex, maturity, and training status. The proportion of time spent sedentary had little impact on absolute and scaled V̇O2max (0.01 – 1.98%). These findings therefore highlight that intensity of PA may be of greater importance for increases in V̇O2max than reductions in SED and should be incorporated into future intervention designs.
Training, Youth, Cardiorespiratory fitness, CoDa, Moderate, Vigorous, allometric
Faculty of Science and Engineering