Abstract
[Purpose] We examined the effect of trunk exercise for prevention of low back pain on health-related QOL and balance ability. [Subjects] Twenty-four people (74 ± 5.1 years old) participated in this study. They were assigned to an exercise group or a control group. [Methods] Health-related QOL was evaluated using SF-36. Balance ability was evaluated by postural sway during one leg standing and unstable sitting, and sitting time during unstable sitting. [Results] After eight weeks of exercise, significant changes in health-related QOL and balance ability were observed in the exercise group, but not in the control group. [Conclusion] The results suggest that the exercises conducted in this study were effective for improvement of one leg standing balance, unstable sitting balance and health-related QOL.