Change in Physical Activity During a Weight Management Intervention for Breast Cancer Survivors: Association with Weight Outcomes

Tera L Fazzino, Carol Fabian, Christie A Befort, Tera L Fazzino, Carol Fabian, Christie A Befort

Abstract

Objective: This study examined the effects of a group phone-based weight management intervention on change in physical activity as measured via accelerometer and self-report in rural breast cancer survivors. The study also evaluated the role of physical activity on clinically meaningful cut points for weight loss (baseline to 6 months) and weight loss maintenance (6 to 18 months).

Methods: Participants were breast cancer survivors in a weight management intervention who provided valid weight and accelerometer data (N = 142). Participants were categorized into four groups based on weight loss ≥10% and weight regain ≥5% at 18 months.

Results: Accelerometer-measured moderate-to-vigorous physical activity (MVPA) significantly increased from baseline to 6 months (+46.9 minutes). MVPA declined during maintenance but remained significantly greater than baseline. Self-reported MVPA followed a similar pattern as accelerometer MVPA, but estimates were significantly higher. Participants in the high loss, low regain group had significantly higher MVPA at all points.

Conclusions: A distance-based weight management intervention for survivors improved physical activity outcomes over 18 months. Self-reported physical activity was substantially higher than accelerometer measured. Findings highlight the importance of device-based measurement for characterizing the magnitude of physical activity change as well as the role of physical activity in weight management outcomes.

Trial registration: ClinicalTrials.gov NCT01441011.

Conflict of interest statement

Disclosure: The authors have no conflicts of interest to declare.

© 2017 The Obesity Society.

Figures

Figure 1
Figure 1
Flow Diagram for Study Sample
Figure 2
Figure 2
Accelerometer measured and self-reported physical activity *Significantly different at p<.05 level different at p>acomparator group

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Source: PubMed

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