1. What is the evidence that physical activity interventions alone, or combined with diet modification or smoking cessation, are effective in helping individuals sustainably increase their aerobic physical activity? - Is the effectiveness of theoretically based interventions different? - Do hypothesized moderators affect the results of these interventions? - Do these interventions affect theoretically hypothesized mediators? - In these interventions, is there a relationship between changes in theoretically hypothesized mediators and changes in physical activity?
2. What is the evidence that physical activity interventions, alone or combined with diet modification or smoking cessation, are effective in helping cancer survivors improve their psychosocial or physiological outcomes?