Table 2.

Physical activity and physical function

	Y	O	p value
Physical activity	n = 17	n = 16
Wear timea (min day−1)	865 ± 185	858 ± 72	0.887
Activeb (min day−1)	464 ± 128	209 ± 88	0.257
PA (ct day−1,000)	267 ± 114	220 ± 63	0.156
LPA (min day−1)	422 ± 114	487 ± 90	0.085
MVPA (min day−1)	42 ± 24	21 ± 15	0.001
Physical function
Foot tapc (no. in 10 s)	56 ± 7	45 ± 7	<0.001
Stair climbd (s)	2.8 ± 0.4	3.8 ± 0.8	<0.001
Stair descendd (s)	2.6 ± 0.4	3.6 ± 1.1	0.001
Chair rise × 10e (s)	11.8 ± 3.1	14.9 ± 4.1	0.022
400-m walkf (s)	222 ± 20	274 ± 30	<0.001

Data presented as mean ± SD. Physical activity data from one older subject missing for technical reasons; 400-m walk data missing from one older and one younger subject

PA total physical activity by accelerometer, LPA time spent in sedentary-to-low PA, MVPA time spent in moderate-to-vigorous PA

^aTime spent wearing accelerometer

^bTime spent in nonzero PA

^cNumber of foot taps in 10 s

^dTime to climb and descend, respectively, eight steps

^eTime to rise from a chair ten times

^fTime to walk 400 m