Age and ultra-marathon performance - 50 to 1,000 km distances from 1969 – 2012

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Table 6 Multi-level regression analyses for change in running speed across years for the annual ten fastest women and men for multiple finishes, multiple participation and age of athletes with multiple finishes

Distance	β	SE ( β)	Stand.β	T	p
Annual ten fastest men
50 km	0.145	0.009	0.663	16.966	<0.0001
100 km	0.063	0.003	0.663	18.365	<0.0001
200 km	0.036	0.069	0.068	0.517	0.607
1,000 km	−0.026	0.015	−0.321	−1.759	0.090
Annual ten fastest women
50 km	0.178	0.008	0.828	22.229	<0.0001
100 km	0.091	0.005	0.672	17.598	<0.0001