지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.6
- 수록면
- 1,091 - 1,101 (11page)
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초록· 키워드
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Previous studies have shown that resistive exercise training such as isometric handgrip exercise or weight lifting decreases arterial blood pressure. However, the mechanisms responsible for reduction in arterial blood pressure have not been investigated. One mechanism that may lower arterial blood pressure is a neural mechanism termed the muscle metaboreflex that is activated when oxygen delivery to active skeletal muscle falls below a critical level. The muscle metaboreflex, a component of exercise pressor reflex, increases the sympathetic activity to heart and vasculature and then increases arterial blood pressure, cardiac output, and ventilation during exercise. Therefore, the purpose of this study was to investigate the effect of the muscle metaboreflex on hemodynamics following fatiguing rhythmic handgrip exercise and circulatory arrest in 10 male collegiate body builders and 10 age-matched controls. All subjects performed 3 min rhythmic handgrip exercise at the exercise intensity of 60% maximal voluntary contraction and 2 min of postexercise circulatory occlusion while heart rate (HR), stroke volume (SV), systolic blood pressure (SBP), and diastolic blood pressure (DBP) were measured followed by the calculation of cardiac output, mean arterial pressure (MAP), and total vascular conductance (TVC). From resting baseline values, the changes in SBP, DBP, and MAP in body builders during PEI were significantly smaller compared to contol group (SBP: ? 31.2 ㎜Hg vs. ? 36.2 ㎜Hg; DBP: ? 9.9 ㎜Hg vs. ? 18.2 ㎜Hg; MAP: ? 17.0 ㎜Hg vs. ? 24.2 ㎜Hg, respectively).
However, there was no difference in CO between two groups (? 2.2 l/min vs. ? 2.2 l/min) and TVC tended to be higher in body builders compared to control group (? 9.0 ml/min/㎜Hg vs. ? 3.9 ml/min/㎜Hg). This study suggest that chronic resistance training may improve the muscle metaboreflex. The mechanism in which the pressor response mediated by the muscle metaboreflex with resistance training is attenuated is due to peripheral vasodilation.
However, there was no difference in CO between two groups (? 2.2 l/min vs. ? 2.2 l/min) and TVC tended to be higher in body builders compared to control group (? 9.0 ml/min/㎜Hg vs. ? 3.9 ml/min/㎜Hg). This study suggest that chronic resistance training may improve the muscle metaboreflex. The mechanism in which the pressor response mediated by the muscle metaboreflex with resistance training is attenuated is due to peripheral vasodilation.
목차
Abstract
Ⅰ. 서론
Ⅱ. 연구방법
Ⅲ. 결과
Ⅳ. 논의
Ⅴ. 결론
참고문헌
참고문헌 (28)
참고문헌 신청
1. [학술지(정기간행물)] - Anton, M. M. / 2006 / Resistance training increases basal limb blood flow and vascular conductance in aging humans / Journal of Applied Physiology 101 (5) : 1351 ~ 1355
2. [학술지(정기간행물)] - Battagin, A. M. / 2010 / Pressure response after resistance exercise for different body segments in hypertensive people / Arquivos Brasileiros de Cardiologia 95 (3) : 405 ~ 411
3. [학술지(정기간행물)] - Cardoso, Jr. C. G. / 2010 / Acute and chronic effects of aerobic and resistance exercise on ambulatory blood pressure / Clinics 65 (3) : 317 ~ 325
4. [학술지(정기간행물)] - Chester, A. R. / 2000 / Isometric handgrip training reduces arterial pressure at rest without changes in sympathetic nerve activity / American Journal of Physiology-Heart and Circulatory Physiology 279 : H245 ~ H249
5. [학술지(정기간행물)] - Ciriello, J. / 1986 / Function of the ventrolateral medulla in the control of the circulation / Brain Research 396 (4) : 359 ~ 391
2. [학술지(정기간행물)] - Battagin, A. M. / 2010 / Pressure response after resistance exercise for different body segments in hypertensive people / Arquivos Brasileiros de Cardiologia 95 (3) : 405 ~ 411
3. [학술지(정기간행물)] - Cardoso, Jr. C. G. / 2010 / Acute and chronic effects of aerobic and resistance exercise on ambulatory blood pressure / Clinics 65 (3) : 317 ~ 325
4. [학술지(정기간행물)] - Chester, A. R. / 2000 / Isometric handgrip training reduces arterial pressure at rest without changes in sympathetic nerve activity / American Journal of Physiology-Heart and Circulatory Physiology 279 : H245 ~ H249
5. [학술지(정기간행물)] - Ciriello, J. / 1986 / Function of the ventrolateral medulla in the control of the circulation / Brain Research 396 (4) : 359 ~ 391
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