They add: «The greatest
reduction in
risk of developing metabolic
risk factor clustering observed for intermediate levels of physical activity and leisure time sitting was unexpected and suggests that moderate amounts of both moderate - to - vigorous physical activity and leisure time sitting may be sufficient to protect against developing metabolic
risk factor clustering over time... The lack of protection for the most
active adults may reflect a chance finding, or confounding by other factors such as wider use of prescription drugs by participants in less
active groups.