Table 2.

Relative contribution of technical variables to collective performance variability.

Technical variable	β	p-valor	Relative contribution (%)
Relative elevation (m/km)	0.42	<0.001	45%
Unpaved percentage (%)	0.23	<0.01	25%
Distance (km)	0.18	<0.05	20%
Vertical gain (m)	0.11	<0.05	10%