Number and percentage of athletes as well as average running speed (mean ± sd) for the different age groups.

Table 1: Number and percentage of athletes as well as average running speed (mean ± sd) for the different age groups.

Age groups	Athletes (n)	Prevalence (%)	Average running speed (km/h)
18-22	110	1.0	4.99 ± 1.24^†
23-27	583	5.1^†	5.63 ± 1.54*
33-37	1410	12.4^†	5.85 ± 1.63*
38-42	1808	15.8^†	5.97 ± 1.68
43-47	2313	20.3^†	5.96 ± 1.64^†
48-52	2096	18.4^†	5.75 ± 1.46^†
53-57	1590	13.9^†	5.55 ± 1.30^†
58-62	922	8.1^†	5.23 ± 1.25^†
63-67	413	3.6^†	4.92 ± 1.20
> 68	170	1.5^†	4.93 ± 1.25*
	11,415

Note: ^* = statistically different from the above (younger) age group at p ≤ 0.05; ^† = statistically different from the above (younger) age group at p ≤ 0.001.