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