. Author manuscript; available in PMC: 2015 Feb 5.

Published in final edited form as: J Strength Cond Res. 2014 Apr;28(4):892–901. doi: 10.1519/JSC.0000000000000249

Table 4.

Younger finishing ages over time for 10-km races studied.^*

	Within-race		Across-race
	p (men)	p (women)	r² (men)	p (men)	Slope (men) y/y	r² (women)	p (women)	Slope (women) y/y
Top finisher age	0.088	0.898	0.052	0.594	−0.150	0.370	0.147	−0.329
Top 10 average age	0.017	0.186	0.430	0.110	−0.309	0.021	0.758	−0.050
Top 100 average age	<0.001	0.085	0.935	<0.001	−0.349	0.007	0.859	0.011
Top 1,000 average age	<0.001	0.195	0.812	0.006	−0.224	0.438	0.105	0.114
Median age all finishers under 1 hr	<0.001	0.194	0.897	0.001	−0.318	0.087	0.521	−0.046

For “within-race” p values, a p ≤ 0.05 indicates that the finishers within that particular group were younger each year, when controlling for race-to-race variation (e.g., linear regression was performed separately on each race then compared). The bold p values show statistical significance. For “Across-race” p values, p ≤ 0.05 indicates that the finishers within that particular group were younger each year, and the slope indicates how many years of age the finishers decreased per year (linear regression was performed on all finishers in all races each year).