Table 1.

The categorization and number of the participants in the six strata

BMI category	Running distance the first week	Number of participants
BMI≤30	<3 km	n=200*
	3 to 6 km	n=180
	>6 km	n=228
BMI>30	<3 km	n=58
	3 to 6 km	n=45
	>6 km	n=38

^*= the reference strata. BMI = Body mass index. Km = kilometers.