期刊
INTERNATIONAL JOURNAL OF BEHAVIORAL MEDICINE
卷 28, 期 6, 页码 834-839出版社
SPRINGER
DOI: 10.1007/s12529-021-09966-0
关键词
Physical activity; Type 2 diabetes; Behavioral intervention; Positive psychology
资金
- National Institute of Diabetes and Digestive and Kidney Diseases [R21DK109313]
- American Diabetes Association [1-17-ICTS-099]
- National Heart Lung and Blood Institute [K23HL123607, R01HL113272, K23HL148017]
This pilot study found that larger step increases by week 3 in a physical activity intervention predicted activity increase at the end of treatment and follow-up. Variability in early steps was not associated with outcomes. Cut-off values of 500 and 2000 steps for early increase may have practical relevance.
Background This pilot study aimed to test whether increase in daily steps and day-to-day consistency in daily steps during the first several weeks of a physical activity intervention predicted outcomes. Methods This was a secondary analysis from two concurrent studies testing a positive psychology-motivational interviewing intervention to increase physical activity and positive affect in individuals with type 2 diabetes. Steps were measured with accelerometers at study assessments (baseline, end-of-treatment, and 8-week follow-up) and were measured daily throughout the intervention by participants using provided pedometers. We calculated change in steps from intervention week 1 to week 3, along with variability in daily steps over the first 3 weeks, using the best fitting regression line modeling their change. Multiple regression analyses tested whether these predictors were associated with change in physical activity at the end of treatment and at 8-week follow-up. Additionally, we explored the utility of specific cutoffs (e.g., 500 steps) for early step change using a minimum p-value approach. Results In 52 participants, larger step increases by week 3 predicted activity increase at end-of-treatment and follow-up. Variability in early steps was not associated with outcomes. Early increase cutoffs of 500 and 2000 steps may have practical relevance. Conclusion Early response to a physical activity intervention appears to be a useful predictor of outcome and could be used to identify those unlikely to succeed in a given intervention early in treatment.
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