Table 1.

Group data on training volume and Exercise Constrained Sick Days in elite endurance athletes

Training Group	#TY	MECSD	10th and 90th percentile
< 266 h/year	12	54	18 and 160
266 - 538 h/year	27	17	6 and 57
> 538 h/year	22	8	0 and 27

#TY: Number of training years included. MECSD: Median Exercise Constrained Sick Days