혈류제한 저강도 근력 트레이닝이 노인 여성의 혈중 VEGF 농도, 골대사 지표 및 골밀도에 미치는 영향
Effect of low-intensity resistance training with blood flow restriction on serum VEGF level, bone markers and bone mineral density in elderly women
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[목적] 이 연구의 목적은 노인 여성을 대상으로 혈류제한 저강도 근력 트레이닝이 혈중 VEGF 농도, 골대사 지표 및 골밀도에 미치는 영향을 검증하는데 있다. [방법] 이 연구에서는 65세 이상 노인 여성 27명을 연구대상자로 모집하였으며, 연구대상자들은 혈류 제한 저강도 근력 트레이닝 집단(BFRLRT, n=8), 고강도 근력 트레이닝 집단(HRT, n=8), 저강도 근력 트레이닝 집단(LRT, n=5)으로 무작위 분류되었다. 트레이닝은 세 집단 모두 12주간 주3회 knee extension과 leg curl 운동을 하였으며, BFRLRT 집단은 혈류제한과 함께 최대근력의 20% 운동 강도, LRT 집단은 최대근력 20%의 운동 강도, HRT 집단은 최대근력의 70% 강도로 운동하도록 하였다. [결과] 연구 결과, 12주의 트레이닝 기간 후 VEGF 농도는 BFRLRT 집단이 HRT, LRT 집단과 비교하여 유의하게 증가하였다(P<.05). 혈청 Bone ALP 농도는 BFRLRT, LRT 집단이 LRT 집단과 비교하여 유의하게 증가하였다(P<.05). T-score 점수는 BFRLRT, HRT 집단이 LRT 집단과 비교하여 유의하게 증가하였다(P<.05). [결론] 결론적으로, 혈류제한 저강도 근력 트레이닝은 노인 여성의 골대사 지표 개선에 효과적임을 증명함으로써 혈류제한 저강도 근력 트레이닝은 고강도 근력 트레이닝을 대처할 수 있는 효율적인 운동 방법의 하나가 될 수 있을 것으로 생각된다.
Abstract
[Purpose] The purpose of this study was to investigate the effects of lowintensity resistance training with blood flow restriction on serum VEGF, bone markers and bone mineral density in elderly women. [Methods] The subjects were divided into three groups: low-intensity resistance training with blood flow restriction(BFRLRT, n=8); high intensity resistance training(HRT, n=8); low- intensity resistance training (LRT, n=5). Both the BFRLRT and LRT groups worked out knee extension and leg curl exercises at 20% of each estimated onerepetition maximum(1RM) and HRT group worked out knee extension and leg curl exercises at 70% of each estimated 1RM 3 days per week for 12 weeks. [Results] As a result after 12 weeks, serum VEGF level have increased significantly among BFRLRT group compared to HRT and LRT groups. Serum Bone ALP level have increased significantly among BFRLRT and HRT groups compared to LRT group. Calcaneus BMD have increased significantly among BFRLRT and HRT groups compared to LRT group. [Conclusions] In conclusion, despite using low-intensity load, BFRLRT is a efficient training alternative to HRT for improving bone metabolism in older women.
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