Publisher
Wiley
Abstract
Objective: In this study, the associations between the substitution of sedentary time
with sleep or physical activity at different intensities and subsequent weight-loss
maintenance were examined.
Methods: This prospective study included 1152 adults from the NoHoW trial who
had achieved a successful weight loss of ≥5% during the 12 months prior to baseline
and had BMI ≥25 kg/m2 before losing weight. Physical activity and sleep were objectively
measured during a 14-day period at baseline. Change in body weight was
included as the primary outcome. Secondary outcomes were changes in body fat percentage
and waist circumference. Cardiometabolic variables were included as exploratory
outcomes.
Results: Using isotemporal substitution models, no associations were found between
activity substitutions and changes in body weight or waist circumference. However,
the substitution of sedentary behavior with moderate-to-vigorous physical activity
was associated with a decrease in body fat percentage during the first 6 months of
the trial ([symbol]0.33% per 30 minutes higher moderate-to-vigorous physical activity [95%
CI: [symbol]0.60% to [symbol]0.07%], p = 0.013).
Conclusions: Sedentary behavior had little or no influence on subsequent weight-loss
maintenance, but during the early stages of a weight-loss maintenance program, substituting sedentary behavior with moderate-to-vigorous physical activity may prevent a gain in body fat percentage.
Year
2023
Category
Refereed journal