Frequent Versus Single Active Bouts Differentially Affect Movement Behavior and Energy Balance in Adults With Overweight/Obesity.

In 30 seconds

This randomized controlled trial compared frequent short walking bouts with one continuous bout in 30 adults with overweight or obesity. Participants completed either multiple 5-minute brisk walks or a duration-matched 45-minute brisk walk, 5 days per week for 6 weeks. Both approaches shifted daily activity toward more moderate-to-vigorous physical activity and were associated with increased total daily energy expenditure (time effect: p = 0.040). Only the frequent-bout group reduced prolonged sedentary behavior (group-by-time interaction: p = 0.043). Energy intake, appetite, and leptin did not differ between groups.

Key findings

• Only frequent short walking bouts reduced prolonged sedentary behavior (group-by-time interaction: p = 0.043).
• Both interventions increased moderate-to-vigorous activity, with proportional reductions in sedentary and light activity (time effects: all p ≤ 0.011).
• Changes in activity level were associated with increased total daily energy expenditure (time effect: p = 0.040).
• The continuous-bout group showed small increases in body and fat mass compared with the frequent-bout group (interactions: both p ≤ 0.061).

Why it matters

The findings suggest that the daily pattern of activity can influence prolonged sedentary time, even when total walking duration is matched. Both patterns increased moderate-to-vigorous activity and energy expenditure, while measured intake, appetite, and leptin were unchanged. These results help distinguish the effects of accumulating activity in short bouts from completing it in one session, although the body-composition findings remain modest.

What to keep in mind

The trial included 30 participants and lasted 6 weeks; the reported body-composition differences were small and had interaction p-values of ≤ 0.061.