Purpose: To examine the prevalence and clustering of physical activity (PA), fruit and vegetable consumption (5-A-Day), and smoking across six major cancer survivor groups and to identify any associations with health-related quality of life (HRQoL). Methods: A total of 9,105 survivors of six different cancers completed a national cross-sectional survey that included the lifestyle behavior questions and the RAND-36 Health Status Inventory. Results: Only a minority of cancer survivors were meeting the 5-A-Day (14.8% to 19.1%) or PA (29.6% to 47.3%) recommendations, whereas most were meeting the smoking recommendation (82.6% to 91.6%). In terms of the lifestyle behavior clusters, only 5% of cancer survivors were meeting all three recommendations. Analyses of covariance generally showed higher HRQoL in survivors who were meeting versus not meeting each lifestyle behavior recommendation with the strongest associations emerging for PA. Trend analyses showed a steep positive association between the number of lifestyle behavior recommendations being met and HRQoL for breast (P < .001), prostate (P < .001), colorectal (P < .001), bladder (P < .001), uterine (P < .001), and skin melanoma (P < .001) cancer survivors. Conclusion: Few cancer survivors are meeting the PA or 5-A-Day recommendations, and even fewer are meeting all three lifestyle recommendations. The association between the current lifestyle recommendations and HRQoL in cancer survivors appears to be cumulative. Interventions to increase PA and fruit and vegetable consumption and reduce smoking are warranted and may have additive effects on the HRQoL of cancer survivors.

Walking is the primary focus of population-based physical activity initiatives but a theoretical understanding of this behaviour is still elusive. The purpose of this study was to integrate personality, the perceived environment, and planning into a theory of planned behaviour (TPB) framework to predict leisure-time walking.

To determine the independent and interactive associations among body mass index (BMI), physical activity (PA), and health-related quality of life (HRQoL) in breast, prostate, colorectal, bladder, uterine, and skin melanoma cancer survivors. A total of 3241 cancer survivors completed a national cross-sectional survey that included PA questions and the RAND-36 Health Status Inventory. Compared with healthy-weight survivors, obese breast, prostate, bladder, and skin melanoma cancer survivors were significantly less likely to meet the PA guideline. Furthermore, healthy-weight and/or overweight breast, prostate, colorectal, uterine cancer, and skin melanoma survivors reported significantly better physical functioning compared with their obese counterparts, whereas overweight colorectal cancer survivors reported significantly better mental health compared with obese survivors. Finally, hierarchical linear regressions showed that none of the BMI × PA interactions was significant for the physical or mental component composite scores across the cancer types. The percentage of cancer survivors meeting the American Cancer Society's PA guideline seems to vary by weight status in breast, prostate, bladder, and skin melanoma cancer survivors. In addition, BMI and PA have independent associations with HRQoL; however, the interactive association of BMI and PA on HRQoL was negligible. Clarifying the relationship between BMI and PA across different cancer types will help identify potential target groups for future PA interventions that will help ameliorate the negative side effects of cancer and improve HRQoL.