The heterogeneity in reported effects was reduced in higher quality studies , when physical activity was self-directed with some professional guidance and when there was on-going professional support .
Our review suggests that physical activity interventions have a moderate effect on self reported physical activity and cardio-respiratory fitness , but not on achieving a predetermined level of physical activity .
Due to the clinical and statistical heterogeneity of the studies , only limited conclusions can be drawn about the effectiveness of individual components of the interventions .
BACKGROUND Little is known about the effectiveness of strategies to enable people to achieve an increase in their physical activity .
OBJECTIVES To assess the effects of interventions for promoting physical activity in adults aged 16 years and older , not living in an institution .
Using Self-Efficacy and a Transtheoretical Model to Develop a Physical Activity Intervention for Obese Women
Purpose . To assess the effectiveness of applying behavior change theory to a physical activity intervention for obese , sedentary women . Design . A 48-week r and omized controlled trial . Subjects were r and omized to one of two intervention groups . Setting . A university classroom and a local health club . Subjects . Fifty-eight sedentary , obese women . Interventions . A 24-week theory-based physical activity program that aims to change the way subjects think and behave in relation to physical activity ( treatment group , n = 29 ) and a traditionally structured exercise program ( control group , n = 29 ) . Measures . Question naires on physical activity , stage of change , processes of change , and self-efficacy were completed at baseline , 24 weeks , and 48 weeks . Results . Twenty-seven of the 29 participants in the treatment group and 17 participants in the control group completed the study . Analysis of variance revealed significant and positive changes in measures of eight processes of change , self-efficacy , physical activity , and cardiorespiratory fitness in the treatment group at 24 weeks . All but one of these changes were maintained at 48 weeks . In the control group , significant changes occurred in only two processes of change , and no change occurred in self-efficacy , physical activity , or cardiorespiratory fitness at 24 or 48 weeks . Conclusion . A theory-based intervention is more likely to change the way obese women think and behave in relation to physical activity than a traditional exercise program that does not incorporate behavior change theory
The heterogeneity in reported effects was reduced in higher quality studies , when physical activity was self-directed with some professional guidance and when there was on-going professional support .
Our review suggests that physical activity interventions have a moderate effect on self reported physical activity and cardio-respiratory fitness , but not on achieving a predetermined level of physical activity .
Due to the clinical and statistical heterogeneity of the studies , only limited conclusions can be drawn about the effectiveness of individual components of the interventions .
BACKGROUND Little is known about the effectiveness of strategies to enable people to achieve an increase in their physical activity .
OBJECTIVES To assess the effects of interventions for promoting physical activity in adults aged 16 years and older , not living in an institution .