Table 1.

Criteria for grouping individual physical activity levels.

Grouping	Standards
High exercise group	Satisfy any of the following:
	1. Three days or more of all types of high intensity physical activity with a total weekly physical activity level greater than or equal to 1,500 MET-min/w
	2. Three levels of physical activity at a combined intensity of >7 days and a total weekly physical activity level of ≤3,000 MET-min/w
Intermediate exercise group	Satisfy any of the following:
	1. 20 min or more of all types of vigorous physical activity per day for a total of 3 days or more
	2. 30 min or more of all types of moderate intensity and/or walking activity per day for a total of 5 days or more
	3. Three physical activity of 3 intensities for a total of 5 days or more with a weekly total physical activity level greater than 600 MET-min/w
Low exercise group	Failure to report any exercise, or level of exercise that does not meet the criteria for the medium and high groups