Table 1.

Control group and ultra-marathon finishers group distributions depending on age

Age (years)	Control group		Ultra-marathon finishers
	N	%	N	%
<30	305	27.4	62	14.6
31–40	399	35.8	146	34.4
41–50	310	27.8	160	37.6
51–65	94	8.4	54	12.7
>65	6	0.5	3	0.7