Will the age of peak ultra-marathon performance increase with increasing race duration?

Table 4 Multi-level regression analyses for the change in age across years for the annual ten fastest male and female runners after correction for multiple finishes

	ß	SE (ß)	Stand. ß	T	p
Annual ten fastest men
6 hrs	0.129	0.076	0.117	1.693	0.092
12 hrs	0.052	0.056	0.056	0.925	0.356
24 hrs	0.023	0.045	0.030	0.518	0.605
48 hrs	0.275	0.043	0.347	6.390	<0.0001 *
72 hrs	0.177	0.277	0.064	0.638	0.525
6 d	0.236	0.062	0.224	3.833	<0.0001 *
10 d	0.435	0.262	0.158	1.658	0.100 *
Annual ten fastest women
6 hrs	-0.045	0.114	-0.029	-0.392	0.696
12 hrs	0.138	0.074	0.123	1.865	0.063
24 hrs	-0.087	0.052	-0.103	-1.693	0.092
48 hrs	0.269	0.075	0.241	3.576	<0.0001 *
72 hrs	-0.200	4.419	-0.011	-0.045	0.964
6 d	-0.052	0.114	-0.036	-0.454	0.650
10 d	0.304	0.651	0.056	0.466	0.642

ISSN: 2052-1847