Does a shorter wear time requirement (4 days, >=6 hours/day) provide reliable MVPA estimation compared to longer wear times in overweight and obese adults?
For estimating moderate-to-vigorous physical activity in overweight and obese adults using RT3 accelerometers, 4 days of data with at least 6 hours per day of wear time provides optimal reliability while minimizing participant burden.
Longer wear time requirements did not result in significant increases in reliability. Using 4 d of data with >or=6 h x d of wear time optimized the balance between ICC and participant burden in overweight and obese adults before and after a weight loss intervention. Future investigations using accelerometers to estimate MVPA in overweight and obese samples can consider requiring less monitor wear time.
Jerome et al. (Wed,) studied this question.