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

Table 8 Multi-level regression analyses for the change in running speed across years for the annual ten fastest male and female runners after correction for multiple finishes and age of athletes with multiple finishes

	ß	SE (ß)	Stand. ß	T	p
Annual ten fastest men
6 hrs	0.060	0.007	0.534	9.034	<0.0001 *
12 hrs	0.061	0.007	0.472	8.840	<0.0001 *
24 hrs	0.067	0.005	0.633	14.344	<0.0001 *
48 hrs	0.034	0.006	0.344	5.970	<0.0001 *
72 hrs	0.136	0.024	0.503	5.721	<0.0001 *
6 d	-0.014	0.004	-0.199	-3.295	0.001 *
10 d	0.044	0.016	0.260	2.773	0.007 *
Annual ten fastest women
6 hrs	0.116	0.009	0.700	13.087	<0.0001 *
12 hrs	0.125	0.010	0.658	13.013	<0.0001 *
24 hrs	0.103	0.007	0.685	15.225	<0.0001 *
48 hrs	0.023	0.007	0.215	3.148	0.002 *
72 hrs	0.565	0.259	0.397	2.183	0.043 *
6 d	0.087	0.009	0.620	10.117	<0.0001 *
10 d	0.095	0.028	0.381	3.445	0.001 *

ISSN: 2052-1847