Table 4. Relationships between VO_2peak on peak treadmill, submaximal oxygen uptake kinetics, functional mobility, and physical activity.

Variable	VO2peak	tcdeficit	tcEPOC
Controls
VO2peak		–0.55	–0.47
Functional mobility
GUG	–0.57*	0.37	0.30
CGS	0.54*	–0.39	–0.30
US	0.48*	–0.14	–0.04
Physical activity
CHAMPS (total)	0.63*	–0.21	–0.11
CHAMPS (≥ moderate)	0.72*	–0.29	–0.22
CHF
VO2peak		–0.37	–0.40
Functional mobility
GUG	–0.45*	0.48*	0.11
CGS	0.59*	–0.57*	–0.58*
US	0.32	0.25	0.20
Physical activity
CHAMPS (total)	0.04	0.1	–0.05
CHAMPS (≥ moderate)	0.13	0.19	–0.03

*P < 0.05. CHF: congestive heart failure; CHAMPS: community healthy activities model program for seniors; CGS: comfortable gait speed; GUG: get up and go; tc_deficit: lag in oxygen uptake at the beginning of exercise (oxygen deficit); tc_EPOC: excess oxygen uptake above rest following exercise (excess post-exercise oxygen consumption); US: unipedal stance; VO_2peak: peak oxygen uptake.