. Author manuscript; available in PMC: 2012 Apr 1.

Published in final edited form as: Eur J Appl Physiol. 2010 Oct 23;111(4):715–723. doi: 10.1007/s00421-010-1694-1

Table 3.

Multiple regression models designed to determine the independent relationships between age and either treadmill endurance or muscle fatigue after adjusting for economy

	Beta	Partial r	P
Model 1 for walking endurance
Model R = 0.29			<0.02
Intercept	7.3180		<0.01
VO₂ for 3 mph Walk (ml/kg/min)	0.0645	0.10	0.32
Age (years)	−0.0558	−0.25	<0.02
Model 1 for muscle fatigue
Model R = 0.46			<0.01
Intercept	7.3400		<0.01
Muscle metabolic economy (N cm² mmol ATP/L)	−0.0975	−0.39	<0.01
Age (years)	−0.0365	−0.13	0.35