유산소 운동과 저항 운동의 병행 실시가 비활동적인 중년 비만인의 심폐 체력에 미치는 영향

Abstract

The purpose of this study was to investigate (1) whether combined aerobic and resistance training improves cardiorespiratory fitness more than aerobic training alone and (2) changes in cardiorespiratory fitness during relatively short period(4 months) of inactivity in obese middle-aged adults. 34 obese middle-aged adults(19 male, 15 female) underwent maximal exercise tests before and after 4 months of inactivity(control period, 1 exercise/week). After control period, subjects were divided into 3 treatments groups: aerobic training(A, n=10), resistance training(R, n=13), and combined aerobic and resistance training(AR, 11). Exercise training lasted 8 months and another maximal exercise test was conducted at the end of training. Although there was no changes in VO2max during control period, treadmill exercise time to exhaustion(TTE) was decreased(57 seconds, p.01) and body weight was increased(0.8kg, p0.5). R group showed significant improvements in VO2max, TTE, peak O2pulse. However, there was no additive effects of resistance training on VO2max in AR group. Increases of TTE in AR group (26.5%) was largest and significantly different from R group(8.2%, p.01), but there was no difference between A(18.8%) and AR. Ventilatory anaerobic threshold(VAT) improved significantly in both R and AR groups after training(p.01). TTE and VAT are more relevant to functional ability and endurance capacity of individuals than VO2max and results suggest that resistance training could be utilized as an important part of exercise program for the improvements of cardiorespiratory fitness in obese middle-aged adults.