Overall , the current literature supports clearly the dose-response relationship between physical activity and the seven chronic conditions identified .
Moreover , higher levels of physical activity reduce the risk for premature all-cause mortality .
The current Canadian guidelines appear to be appropriate to reduce the risk for the seven chronic conditions identified above and all-cause mortality
This systematic review examines critically the scientific basis for Canada 's Physical Activity Guide for Healthy Active Living for adults .
Particular reference is given to the dose-response relationship between physical activity and premature all-cause mortality and seven chronic diseases ( cardiovascular disease , stroke , hypertension , colon cancer , breast cancer , type 2 diabetes ( diabetes mellitus ) and osteoporosis ) .
The strength of the relationship between physical activity and specific health outcomes is evaluated critically .
Change in lifestyle factors and their influence on health status and all-cause mortality.
BACKGROUND The purpose of this study was to analyse both cross-sectional associations and how longitudinal changes in lifestyle factors from one state in 1980 - 1981 to another in 1988 - 1989 influence self-reported health status . Another aim was to estimate the hazard ratios for all-cause mortality for the changes in lifestyle factors and self-reported hypertension during the same period of time . METHOD The cross-sectional and the longitudinal analyses are based on the same simple r and om sample of 3,843 adults , aged 25 - 74 , interviewed in 1980 - 1981 and 1988 - 1989 and is part of the Swedish Annual Level-of-Living Survey . About 85 % of the respondents in the first interview participated in a second interview in 1988 - 1989 . Cross-sectional odds ratios , based on a marginal model , were estimated using the generalized estimating equations . The transitional models were analysed using unconditional logistic regression . A proportional hazard model was applied to investigate the influence of lifestyle transitions on mortality . RESULTS Physical inactivity , being a current or former smoker and obesity ( women only ) were strong risk factors for poor health either as main effects and /or combined ( interactions ) . There was a strong interaction between physical activity and smoking , and for women , also between body mass index ( BMI ) and physical activity . Smoking , physically inactive and obese women had about a ten times higher risk of poor health status than non-smoking , physically active , and normal-weight women . The corresponding risk for men was about five times higher . Physically active , but smoking and obese individuals showed only moderately increased risks for poor health status . The transitional model showed that those who were physically inactive in 1980 - 1981 , but did exercise in 1988 - 1989 , improved their health after adjustments for sociodemographic and other lifestyle factors . Continuing to smoke or being physically inactive or having hypertension at both points in time were all associated with higher hazard ratios for all-cause mortality ( 1.6 , 1.9 and 1.8 , respectively ) than those who reported that they were in good status at both points in time . CONCLUSIONS We found that physical activity protects against poor health irrespective of an increased BMI and smoking . The major clinical implication s are the long-st and ing benefits of physical activity and not smoking
Overall , the current literature supports clearly the dose-response relationship between physical activity and the seven chronic conditions identified .
Moreover , higher levels of physical activity reduce the risk for premature all-cause mortality .
The current Canadian guidelines appear to be appropriate to reduce the risk for the seven chronic conditions identified above and all-cause mortality
This systematic review examines critically the scientific basis for Canada 's Physical Activity Guide for Healthy Active Living for adults .
Particular reference is given to the dose-response relationship between physical activity and premature all-cause mortality and seven chronic diseases ( cardiovascular disease , stroke , hypertension , colon cancer , breast cancer , type 2 diabetes ( diabetes mellitus ) and osteoporosis ) .
The strength of the relationship between physical activity and specific health outcomes is evaluated critically .