Fig. 1

Average daily sleep duration (ADSD) (black line) and sleep deprivation (gray bars) compared to the usual ADSD (horizontal red line) for seven days before the race. The ADSD of the total population is presented with a 95% confidence interval. Orange line = Diagonale Des Fous race (DDF). Blue line = Trail De Bourbon (TDB) race. * = p < 05 refers to a comparison between ADSD for each of the seven days before the race and the usual ADSD