Fig 1.
Outline of the study.
Table 1.
Comparison of BMD between sedentary group and brisk walking group.
Table 2.
Correlations between BMD and intensity, duration, frequency, volume and index.
Table 3.
Correlations between intensity, duration, frequency, volume and index.
Table 4.
Stepwise regression between BMD and intensity, duration, frequency, volume and index.
Fig 2.
Comparison of BMD between the control group, the volume 8 group, the volume 12 group, the volume 16 group and the volume 20 group before and after brisk walking.
(A) There were no significant differences between the control group, the volume 8 group, the volume 12 group, the volume 16 group and the volume 20 group before brisk walking. Volume = frequency x duration, which was calculated according to the self-reported Physical Activity Index questionnaire. The subjects whose volume was ≈ 8 were assigned to the volume 8 group and so forth. (B) Compared with the control group, significant differences were observed in the volume 16 group and the volume 20 group. *P<0.05; **P<0.01.