Background/Objectives: 본 연구의 목적은 복부 브레이싱 운동과 복부 할로잉 운동을 결 합한 요부 안정화 운동프로그램이 20대 정상성인의 폐기능에 미치는 영향과 흡연자와 비흡 연자를 비교하여 그 차이를 알아보고자 하는 데 있다. Methods/Statistical analysis: 이를 위해 20대 정상성인을 대상으로 흡연집단(n=16)과 비 흡연집단(n=16) 두 그룹으로 모집하여 동일한 중재를 실시하였다. Findings: 흡연집단은 집단 내 기간 지남에 따라 폐기능 요인 중 FVC과 FEV1/FVC를 제 외한 FEV1과 PEF가 운동 전보다 유의하게 증가하였다(p<.05). 비흡연집단에서 기간 지남에 따라 폐기능 요인 중 FVC과 PEF를 제외한 FEV1, FEV1/FVC가 운동 전보다 유의하게 증가하 였다(p<.05). Improvements/Applications: 본 연구 결과, 복부 브레이싱 운동과 복부 할로잉 운동을 결 합한 요부 안정화 운동프로그램은 흡연집단과 비흡연집단 두 그룹의 폐기능 향상에 효과가 나타난 것을 알 수 있었다.

Background: Improvement of lumbo-pelvic stability can reduce the compensatory action of the quadratus lumborum (QL) and selectively strengthen the gluteus medius (GM) during side-lying hip abduction (SHA). There are abdominal draw-in maneuver (ADIM) and abdominal bracing (AB) as active ways, and pelvic compression belt (PCB) as a passive way to increase of lumbo-pelvic stability. It is necessary to compare how these stabilization methods affect the selective strengthening of the GM. Objects: To investigate the effects of ADIM, AB, and PCB during SHA on the electromyography (EMG) activity of the GM, QL, external oblique (EO) and internal oblique (IO), and the GM/QL EMG activity ratio. Methods: A total of 20 healthy male adults participated in the study. The subjects performed three conditions in side-lying in random order: SHA with ADIM (SHA-ADIM), SHA with AB (SHA-AB), and SHA with PCB (SHA-PCB). To compare the differences among the three conditions, the EMG activities of the GM, QL, EO and IO, and GM/QL EMG activity ratio were analyzed using one-way repeated ANOVA. Results: The EMG activity of the QL was significantly higher in SHA-AB than in SHA-ADIM and SHA-PCB. The GM/QL activity ratio was significantly higher in SHA-PCB than in SHA-ADIM and SHA-AB. In addition, the figure for SHA-ADIM was significantly higher than that for SHA-AB. In the case of the EO, the figure for SHA-AB was significantly higher than corresponding values for the other two conditions. The figure for SHA-ADIM was significantly higher than that for SHA-PCB. The EMG activity of the IO was significantly higher in SHA-AH than in SHA-PCB. Conclusion: It can be suggested that wearing the PCB can more selectively strengthen the GM than to perform ADIM and AB during SHA. In addition, the ADIM can be recommended when there is a need to strengthen abdominal muscles during SHA.