Abstract
The purpose of the present study was to examine changes in
mobility and joint angular velocity of the lower extremities after
high-speed combination squat training, which is a high-speed
chair standing-up training with an additional plantar flexion task.
Twelve trained elderly women (age: 67±3.2 years old) performed
resistance exercises and high-speed combination squat in which an
operating characteristic with regard to moving capability is similar,
using their body weight once a week for 16 weeks. After exercise
intervention, the subjects were classified into two groups on the
basis of the change in walking or stair ascent times (6 high and 6
low improvement groups), respectively. Hip joint angular velocity
improved significantly for the group that demonstrated the high
improvement in walking time compared with the low improvement
group. Knee (d ＝0.87) and ankle (d ＝0.89) joints angular
velocities increased in the group with the high improvement in
the 12 steps stair ascent time compared with the low improvement
group. These results suggest that improvement in walking or stair
ascent abilities were affected by hip joint angular velocity or knee
and ankle joints angular velocities, respectively.
