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Pattern changes in step count accumulation and peak cadence due to a physical activity intervention
T V Barreira1, D M Harrington2, J M Schuna3
1Pennington Biomedical Research Center, USA; Syracuse University, USA.
Journal of Science and Medicine in Sport
|February 18, 2015
Summary
A 12-week physical activity (PA) intervention improved moderate-to-vigorous intensity step counts, even without significant changes in daily steps. This highlights the importance of analyzing step cadence patterns for effective PA interventions.
Area of Science:
- Exercise Physiology
- Behavioral Medicine
- Public Health
Background:
- Weight management interventions often include physical activity (PA) components.
- Assessing PA effectiveness typically relies on daily step counts, which may not capture intensity.
- Understanding step accumulation patterns and cadence is crucial for evaluating intervention impact.
Purpose of the Study:
- To determine if a 12-week weight loss intervention with a PA component alters daily steps, step accumulation patterns, and peak cadence.
- To investigate changes in step count distribution across different cadence bands.
- To compare the effects of a diet and PA intervention versus a diet-only intervention on these metrics.
Main Methods:
- A randomized clinical trial involving 121 overweight/obese adults (35-64 years).
- Participants were assigned to a diet education plus PA education and behavior change group (DE+PA) or a diet education and behavior change group (DE).
- Accelerometers (Actigraph GT3X+) measured steps/day, step accumulation in cadence bands (steps/min), and peak cadences pre- and post-intervention.
Main Results:
- While overall daily steps did not differ significantly between groups, the DE+PA group showed significant increases in steps within higher cadence bands (80-99, 100-119, 120+ steps/min).
- The DE+PA group demonstrated significant increases in steps accumulated at 100-119 and 120+ steps/min cadence bands compared to the DE group.
- Peak 60-minute cadence also significantly increased in the DE+PA group relative to the DE group.
Conclusions:
- Changes in daily step counts alone may not fully reflect the benefits of physical activity interventions.
- PA interventions can enhance the accumulation of steps at moderate-to-vigorous intensity cadences, which is a more sensitive indicator of improved activity.
- Analyzing step cadence patterns provides deeper insights into the effectiveness of PA interventions for improving health behaviors.
