Background: Increases in chronic illness due to sedentary lifestyles and<br />poor metabolic fitness have led to numerous intervention strategies to<br />promote physical activity (PA). This paper describes the methodological<br />strategies of two short-term PA interventions. Outcome measures reported<br />are PA adherence and compliance rates during the intervention and at 3,<br />6 and 12-month follow-up.<br />Methods: The 40-day interventions were: a pedometer-based walking<br />program (n = 251) and a group-based intensive program (n = 148). There<br />was also an active control group (n = 135). Intervention subjects were<br />prescribed PA each day and required to record all activity sessions<br />(pedometer steps or energy expenditure from heart rate monitors).<br />Results: Compliance (>= 150 min/wk PA) was highest post-intervention<br />(81.1% and 64.5% for the group and pedometer subjects, respectively)<br />and then progressively decreased across the 12-month follow-up period<br />(final compliance rates were 53.5% and 46.6%, respectively) although<br />they remained significantly higher than pre-intervention rates (zero<br />%). There was significantly higher adherence to 6 months (75.0% and<br />64.9%), and compliance to 3 months (64.9% and 51.0%), for group<br />versus pedometer subjects. The active control group maintained the<br />highest adherence and compliance rates across the study.<br />Conclusions: The group-based program resulted in higher adherence and<br />compliance rates post-intervention although both types of interventions<br />showed long-term effectiveness to increase activity patterns.
Norton, L. H., Norton, K. I., Lewis, N., & Dollman, J. (2011). A comparison of two short-term intensive physical activity interventions: Methodological considerations. International Journal of Behavioral Nutrition and Physical Activity, 8. https://doi.org/10.1186/1479-5868-8-133