A short-term physical activity randomized trial in the Lower Mississippi Delta

Peter T Katzmarzyk, Catherine M Champagne, Catrine Tudor-Locke, Stephanie T Broyles, David Harsha, Betty M Kennedy, William D Johnson, Peter T Katzmarzyk, Catherine M Champagne, Catrine Tudor-Locke, Stephanie T Broyles, David Harsha, Betty M Kennedy, William D Johnson

Abstract

Background: The purpose of this study was to determine if a short-term pedometer-based intervention results in immediate increases in time spent in moderate-to-vigorous physical activity (MVPA) compared to a minimal educational intervention.

Methods: A sample of 43 overweight adults 35 to 64 years of age participated in a one week pedometer-based feasibility trial monitored by accelerometry. Participants were randomized into a one-week education-only group or a group that also wore a pedometer. Accelerometer-measured MVPA was measured over 7 days at baseline and again for 7 days immediately post-intervention.

Results: Minutes of MVPA increased significantly in the overall sample (p = 0.02); however, the effect of adding the pedometer to the education program was not significant (p = 0.89). Mean (±SE) MVPA increased from 12.7 ± 2.4 min/day to 16.2 ± 3.6 min/day in the education-only group and from 13.2 ± 3.3 min/day to 16.3 ± 3.9 min/day in the education+pedometer group. The correlation between change in steps/day and change in MVPA was 0.69 (p<0.0001).

Conclusions: The results of this study suggest that the addition of a pedometer to a short-term education program does not produce added benefits with respect to increasing physical activity in the Lower Mississippi Delta.

Trial registration: ClinicalTrials.gov NCT01264757.

Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Figure 1. Flow of participants through the…
Figure 1. Flow of participants through the study.
Figure 2. Individual changes in minutes of…
Figure 2. Individual changes in minutes of moderate-to-vigorous physical activity (MVPA) and time in sedentary behavior.
Panel A presents results for MVPA and panel B presents results for sedentary behavior. Participants in the education-only group are represented by the gray bars, and those in the education+pedometer group are represented by the black bars.
Figure 3. Changes in minutes of moderate-to-vigorous…
Figure 3. Changes in minutes of moderate-to-vigorous physical activity (MVPA), lifestyle activity, and time in sedentary behavior.
Panel A presents results for MVPA, panel B presents results for lifestyle activity, and panel C presents results for sedentary behavior. The error bars represent 1 standard error.
Figure 4. Scatter plot of changes in…
Figure 4. Scatter plot of changes in steps/day and changes in minutes of moderate-to-vigorous physical activity.
The black boxes represent participants in the education+pedometer group and the gray triangles represent participants in the education-only group.

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Source: PubMed

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