Fig. 1From: The association between the built environment and intervention-facilitated physical activity: a narrative systematic reviewConceptual framework and graphical display of potential mechanisms underlying the interrelationships between the built environment, intervention, and intervention-facilitated physical activity. Invariant A The built environment has minimal influence on the effects of the physical activity invention. The intervention increases physical activity to a similar degree in less and more supportive built environments. Amplification B A more supportive built environment amplifies the effects of the physical activity intervention. The intervention increases physical activity to a greater degree in a more supportive built environment than in a less supportive built environments. Compensation C A more supportive built environment has minimal influence on the effects of the physical activity intervention but the intervention is effective in increasing physical activity in a less supportive built environment. Suppression D A less supportive built environment has minimal influence on the effects of the physical activity intervention but the effects of the intervention on physical activity are constrained in a more supportive built environment. Note that built environment-intervention interactions could also include the combination of compensation-suppression mechanism (i.e., the intervention is effective in increasing physical activity in a less supportive built environment while the effects of the same intervention on physical activity are constrained in a more supportive built environment)Back to article page