전신 기울기 운동 시 시각적 바이오피드백이 올바른 자세 유지 시간과 체간 근육의 근활성도에 미치는 영향

The purpose of this study was to assess visual biofeedback`s influence on trunk muscles` (EMG) activity and endurance holding time for correct position during whole-body tilt exercise. For the study, we recruited 14 volunteers who showed no symptom of lumbar disease during medical tests. We measured the EMG activity of their rectus abdominis, external abdominal oblique, internal abdominal oblique and erector spinae muscles, and their endurance holding time for correct position during 40° anterior and posterior whole-body tilt under two conditions: whole-body tilt with and without visual biofeedback. Resistance with gravitational force on the trunk during whole-body tilt was applied by using a device that had a monitor on which the subjects could check their alignment and that sounded an alarm if a subject`s alignment collapsed. The study showed an increase in the EMG activity of external abdominal oblique, internal abdominal oblique/rectus abdominis ratio and endurance holding time for correct position during both 40° anterior and posterior whole-body tilt with visual biofeedback compared with without visual biofeedback(p