Independence DayOur office will be closed Monday, July 4th in observance of American Independence Day. We will reopen at regular business hours on Tuesday, July 5th.
Pattern changes in step count accumulation and peak cadence due to a physical activity intervention
- Published on Feb. 3, 2015
Objectives: The purpose was to determine if a 12-week weight loss intervention with a physical activity (PA) component would lead to changes in steps/day, step count accumulation patterns, and peak cadence
Design: Randomized clinical trial.
Methods: Overall, 121 overweight/obese White and African-American adults (ages 35–64 yrs) were randomized to a diet education plus PA education and behavior change intervention group (DE + PA) or diet education and behavior change group (DE). The DE + PA intervention was designed to increase steps/day, and steps at moderate-to-vigorous intensity. The Actigraph GT3X+ accelerometer was used to measure steps accumulated in different cadence bands (1–19, 20–39, 40–59, 60–79, 80–99, 100–119, 120+ steps/min), and peak 1-min, 30-min and 60-min cadence. Pre- to post-intervention changes in steps/day, step count within each cadence band, and peak cadences were compared within groups using paired sample t-test and between groups after adjustment for baseline values of the same variable using ANCOVA.
Results: Ninety participants had valid data (44 in the DE + PA group). Change in steps/day was not significantly different between the groups. However, participants in the DE + PA group accumulated significantly more steps at post-intervention in the 80–99, 100–119, and 120+ cadence bands, all p < 0.02. The DE + PA group increased step counts accumulated within the 100–119 (463 ± 1092 vs 56 ± 546 step counts; p = 0.01) and 120+ (390 ± 999 vs 34 ± 321 step counts; p = 0.03) cadence bands, as well as peak 60-min cadence when compared to the DE group.
Conclusions: Non-significant changes in steps/day following a PA intervention may mask changes in steps accumulated at moderate-to-vigorous intensity cadences.
Journal of Science and Medicine in Sport