Table 1.

Clinical characteristics and physical activity levels of controls and heart failure patients

	Control	HF
Age, yr	72.2 ± 2.0	73.3 ± 3.9
Height, cm	167.2 ± 3.4	170.2 ± 2.8
Body mass, kg	85.5 ± 5.4	87.0 ± 7.6
Leg fat-free mass, kg	15.7 ± 1.3	15.4 ± 1.4
Peak oxygen consumption, ml · kg−1 · min−1	23.4 ± 1.2	13.7 ± 1.2*
Knee extensor isometric torque, N · m†	159 ± 11	129 ± 11
Physical activity level, kcal/day	247 ± 40	215 ± 44

Data are means ± SE for n = 11 controls and n = 11 heart failure (HF) patients. Peak oxygen consumption data are expressed relative to body mass (kg). †Knee extensor isometric torque was adjusted for leg fat-free mass statistically using analysis of covariance, which yields group adjusted means with units of N · m. Physical activity level reflects average daily energy expenditure for physical activity as calculated from an accelerometer worn at the waist for an average of 7 days.

^*P < 0.01.