Dear Editor,
Failure to meet World Health Organization (WHO)-determined minimum physical activity (PA) levels is an established risk factor for cardiovascular disease (CVD),1 but evidence is still scarce on its effects on other CVD risk factors. Furthermore, whether or not there are sex-specific effects on the association between PA and CVD risk is a matter of controversy, with some authors observing a protective effect of PA in men but not in women,2 and others finding the opposite trend.