An empirical study of race times in recreational endurance runners

Table 4 Distribution of residuals

Centile	Model 1	Model 2	Riegel
5^th	−23:53	−21:38	−36:17
10^th	−18:25	−16:47	−30:24
25^th	−9:55	−7:31	−19:47
33^rd	−7:18	−4:53	−16:50
50^th	−1:47	0:23	−10:09
67^th	3:21	4:46	−5:08
75^th	6:28	7:20	−2:48
90^th	11:49	15:01	2:53
95^th	15:23	21:05	5:12

The table shows differences between predicted and observed race times. A negative time indicates that predicted race time is shorter than observed, that is, predicted velocity is too fast. The table shows that, for instance, nearly 25 % of runners have a predicted race time from the Riegel formula greater than 20 min too fast

ISSN: 2052-1847