Journal
FRONTIERS IN PHYSIOLOGY
Volume 8, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fphys.2017.00655
Keywords
accelerometer; microsoft band 2; multi-sensor; recovery; sedentary behavior; wearable
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Funding
- German Research Foundation (DFG)
- University of Wuerzburg
- German Federal Institute of Sports Sciences (BISp) [ZMVI4-070707/16]
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The aim of this pilot study was to analyze the off-training physical activity (PA) profile in national elite German U23 rowers during 31 days of their preparation period. The hours spent in each PA category (i.e., sedentary: <1.5 metabolic equivalents (MET); light physical activity: 1.5-3 MET; moderate physical activity: 3-6 MET and vigorous intense physical activity: >6 MET) were calculated for every valid day (i.e., > 480 min of wear time). The off-training PA during 21 weekdays and 10 weekend days of the final 11-week preparation period was assessed by the wrist-worn multisensory device Microsoft Band II (MSBII). A total of 11 rowers provided valid data (i.e., > 480 min/day) for 11.6 week days and 4.8 weekend days during the 31 days observation period. The average sedentary time was 11.63 +/- 1.25 h per day during the week and 12.49 +/- 1.10 h per day on the weekend, with a tendency to be higher on the weekend compared to weekdays (p = 0.06; d = 0.73). The average time in light, moderate and vigorous PA during the weekdays was 1.27 +/- 1.15, 0.76 +/- 0.37, 0.51 +/- 0.44 h per day, and 0.67 +/- 0.43, 0.59 +/- 0.37, 0.53 +/- 0.32 h per weekend day. Light physical activity was higher during weekdays compared to the weekend (p = 0.04; d = 0.69). Based on our pilot study of 11 national elite rowers we conclude that rowers display a considerable sedentary off-training behavior of more than 11.5 h/day.
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