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 .
Groningen Active Living Model (GALM): stimulating physical activity in sedentary older adults; validation of the behavioral change model.
BACKGROUND A significant proportion of older adults in The Netherl and s do not participate regularly in leisure-time physical activity . The Groningen Active Living Model ( GALM ) was developed to change this situation for the better . Longitudinal results of the validation of the GALM behavioral change model are presented . METHODS We obtained data on potentially mediating variables of physical activity behavior change ( self-efficacy , social support , perceived fitness , and enjoyment ) from 96 participants in a prospect i ve study during the 18 months the GALM strategy lasted . RESULTS Prospect i ve analyses revealed significant differences in several potentially mediating variables , although some of these differences were contrary to our hypothesis . Discriminant analysis result ed in canonical correlations of 0.50 after 6 months and 0.66 after 18 months of program participation between adherers and nonadherers , respectively ; 73.8 and 80.0 % of the subjects were classified correctly . CONCLUSIONS Based on the results , it can be concluded that we partially succeeded in manipulating the potentially mediating variables by means of our GALM strategy . Several mediating variables were identified that reliably discriminated long-term adherers from nonadherers , exp and ing the generalizability of social cognitive theory-driven variables to a Dutch population
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 .