Table 2.

Physical Fitness and Muscle Function/Mass of the Study Population

Parameter
Physical activity, steps/day	8059 (4757)
6-minute walk distance, m	376 (119)
4-meter gait speed, m/s	0.89 (0.22)
30-second chair stand test, number of stands	11 (3)
Timed up and go test, s	10.3 (3.3)
Handgrip strength – right hand, kg	30.7 (10.1)
Handgrip strength – left hand, kg	29.1 (9.2)
Fat-free mass index, kg/m2	18.3 (2.7)
Calf circumference, cm	35.6 (4.2)
Arm muscle area, cm2	48.6 (12.5)
Rectus femoris cross-sectional area, cm2	6.0 (1.8)

Note: Data are presented as means (standard deviation).