Table 1 Topic guide for focus groups

• Reasons for participation and reasons for apprehension

• Perceived benefits of the lifestyle intervention

• Structure of the supervised exercise sessions

• Perceived problems with the lifestyle intervention

• Engaging with the independent exercise sessions

• Communication with health professionals

• Frequency, intensity and duration of exercise sessions

• Burden of disease and treatment side-effects

• Contact with exercise specialists

• Comparison to a commercial gym environment

• Barriers to exercising

• Format of the dietary intervention

• Overall duration of the intervention

• Support from peers/family

• Comparison to conventional discussions groups

• Burden of trial assessments

• Recommendations for the design of future lifestyle interventions