운동으로 유도된 근손상이 안정시 대사량과 혈중 카테콜라민 농도에 미치는 영향

초록

The aim of this study was that effect of exercise-induced muscle damage(EIMD) on resting metabolic rate and blood catecholamines concentration. Eight subjects(age 24.4±2.10 years, Height 176.4±5.80 cm, Weight 73.6±8.80 kg, % body fat 23.5±3.55 %, VO2max 50.9±4.00 ml/kg/min) were completed three resting metabolic rate(RMR) measurements, one maximal exercise work load test, and one eccentric exercise(downhill running for 30min at -12% grade of treadmill). The blood was collected for assay the creatine kinase(CK) and catecholamines (epinephrine and norepinephrine). There were significant differences in RMR which were calculated by day, body weight, fat free mass following the EIMD(p<.05). Also there were significant differences in resting oxygen consumption, RER, muscle soreness scale, and blood creatine kinase activity following the EIMD(p<.05). However, there were no significant differences in blood catecholamines(epinephrine and norepinephrine) concentration following the EIMD(p>.05). In conclusion, this study showed that in the presence of exercise-induced muscle damage energy expenditure, expecially resting metabolic rate(RMR), is increased before having muscle damage. The index of muscle damage(creatine kinase) also have related to the RMR after exercise-induced muscle damage. It was suggested that EIMD may be either metabolic or mechanical, or combination of both, depending upon exercise type, intensity and duration and training status. Also we need to study about the mechanism for the oxygen consumption following EDMI with the resonable research tools, such as, hormonal changes and energy substrate utilization.

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