압력 바이오피드백 장치를 사용한 골반바닥근 수축이 한 다리 서기 동안 엉덩이 폄근 및 몸통 안정화 근육 패턴에 미치는 영향

Effect of Pelvic Floor Muscle Contraction Using a Pressure Biofeedback Device on Hip Extensor and Trunk Stabilization Muscle Patterns during One-Leg Stand

Background: The pelvic floor muscles play an important role in maintaining various functions of the human body, such as regulating intra-abdominal pressure, contributing to the movement of the lumbar spine and stabilization of the sacroiliac joint and the entire pelvis, and controlling the anus and sphincter muscles. One-legged standing has been used to evaluate the ability of the sacroiliac joint to maintain lumbar-pelvic stability, and it has been shown that activation of the pelvic floor muscles is necessary to maintain stability. Objectives: The purpose of this study was to investigate changes in the muscle activity of the hip extensor and trunk stabilizing muscles and the reaction time of each muscle depending on the presence or absence of pelvic floor muscle activation when performing a one-legged standing. Methods: A total of 15 healthy adult volunteers participated in this study. Muscle activity and muscle reaction time were examined in two conditions of one-legged standing with and without pelvic floor muscle contraction. Data were collected using electromyography equipment and analyzed using paired t-test. Results: When standing on one leg after performing pelvic floor muscle contraction training, muscle activity of the gluteus maximus, multifidus, and transversus abdominis/internal obliques significantly increased (p < 0.05), and reaction time significantly decreased (p < 0.05). Under the same conditions, there was no significant difference in muscle activity of the biceps femoris (p > 0.05), and reaction time significantly increased (p < 0.05). Conclusions: Pelvic floor muscle contraction using pressure biofeedback during one-leg standing can help improve the action of the hip extensor and trunk stabilizing muscles, and also contributes to improving reaction time related to exercise performance speed.