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 .
Physical activity and risk of colorectal cancer in Japanese men and women: the Japan Public Health Center-based prospective Study
Objective To prospect ively examine the association between physical activity and the risk of developing colorectal cancer in a large population -based cohort study of Japanese men and women , and to investigate whether the effects of physical activity on colorectal cancer risk differ by sex and subsite . Methods We analyzed data from a population -based cohort of 65,022 subjects . A total of 486 incident colorectal cancers ( 154 proximal colon , 166 distal colon and 149 rectal cancers ) was identified during 6 years of follow-up . Results We observed a significant inverse association between physical activity  and the risk of developing colorectal cancer , particularly colon cancer , among men . Relative to men in the lowest level of metabolic equivalent ( MET ) hours per day , those in the highest level had a RR of 0.69 ( 95 % CI = 0.49–0.97 ) . A significant decrease in risk of colorectal cancer was associated with increasing MET hours per day among men . This inverse association was essentially limited to colon cancer . A significant decrease in risk with increasing MET-hour score was observed predominantly for proximal colon cancer among men . In contrast , no significant decrease was seen among women . Conclusion These findings suggest that physical activity may prevent colon cancer among Japanese men
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 .