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레크리에이셔널 댄스 운동이 노인여성의 심혈관계 위험인자 및 혈관 구조와 기능에 미치는 영향

Effects of recreational dance exercise on cardiovascular risk factors, vascular structure and function in older women.

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초록

노화는 동맥의 구조 변화와 기능 저하를 가져오며 이는 심혈관계 질환의 위험도를 증가시킨다. 본 연구의 목적은 레크리에이셔널 댄스 운동이 노인 여성의 혈관 구조와 기능 및 전통적 심혈관계 위험인자와 체력에 미치는 효과에 대해 알아보는데 있다. 23명의 건강한 노인 여성(평균연령 63±4세)을 대상으로 운동그룹 12명과 통제그룹 11명으로 무선배정하였다. 운동그룹은 12주간 예비심박수의 40~60% 강도로 주 3회, 1회 운동시간 60분 동안 강강술래를 이용한 레크리에이셔널 댄스 운동을 실시하였으며, 통제그룹은 동일기간 동안 평소 생활습관을 유지하도록 하였다. 종속 변인으로 운동참가 전, 후에 체성분, 혈중지질, HOMA-index, 고밀도 C-반응성단백(hs-CRP), 심폐체력, 상완동맥 혈류 의존성 혈관이완, 경동맥 내중막 두께, 경동맥 신전성을 측정하였다. 12주간 레크리에이셔널 댄스 운동 후, 운동그룹은 hs-CRP(p=.001), HOMA-index(p=.001)가 유의하게 감소되었으며, 경동맥신전성(p=.002)과 최대산소섭취량(p=.029)은 유의하게 개선되었으며 집단과 시기간 유의한 상호작용을 나타냈다. 상완동맥 혈류 의존성 혈관이완능과 경동맥 내중막 두께는 운동 후 개선되는 경향을 나타냈으나 통계적으로 유의한 차이를 나타내지 않았다. 이상의 결과를 종합해 보면, 레크리에이셔널 댄스운동은 노인 여성의 심폐기능 향상과 혈관 기능을 개선시키는 것으로 보인다.

Abstract

Aging has a negative effect on large elastic artery structure and function which increases the risk of cardiovascular disease(CVD). The purpose of this study was to assess the effect of a recreational exercise program on vascular structure and function, traditional CVD risk factors and cardiorespiratory fitness in older women. Twenty three subjects(age 63±4 yrs, female) were randomly assigned to a dance-exercise group (n=12) and a non-exercise control group (n=11). The subjects in the exercise group performed supervised recreational dance exercise with moderate intensity (40~60% of heart rate reserve) for 12 weeks, 60 minutes per session, 3 times per week. Body weight, lipid profiles, insulin resistance(HOMA index), high sensitivity C-reactive protein(hs-CRP), and cardiorespiratory fitness were measured at baseline and after 12 weeks intervention. Also, brachial artery flow mediated vasodilatation (FMD), common carotid artery intima media thickness(IMT) and carotid distensibility were measured using B-mode ultrasound. After the 12 weeks intervention, body weight, blood pressure and lipid profiles did not significantly change in the exercise group compared with the control. However, hs-CRP(1.66±0.6 to 1.19±0.7 mg/L, p=.001) and HOMA index (0.55±0.3 to 0.38±0.2, p=.001) were significantly improved in the exercise group. Also, cardiorespiratory fitness (22.3±3.3 to 25.2±5.0 ml/kg/min, p=.029) and carotid artery distensibility(0.02±0.01 to 0.04±0.02 1/kPa, p=.002) were significantly increased in the exercise group, while there were no significant changes in mean IMT and FMD in the exercise group. These data indicate that recreational dance exercise reduces hs-CRP level and improves cardiorespiratory fitness, insulin sensitivity and carotid artery function in older women and these effects are not dependent on changes in traditional CVD risk factors.

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