Vigorous activity protective against colorectal cancer
A University of Western Australia study of 870 patients with CRC aged 40–79 years compared their activity levels to those of a matched control group.
Men and women consistently performing six or more hours per week of vigorous physical activity during their adult lifetime reduced their risk of distal colon cancer by 41%, and men also reduced their risk of rectal cancer by 50%, the study found.
The same amount of energy expended performing moderate physical activity had no effect on CRC risk.
Walking or bike riding less than 16 km/h was considered “moderate”, while jogging and jumping rope were classed as “vigorous” activities.
Cancer Causes Control 2011; in press