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持续测量左心室的表现,在进行和结束最大同位数死抬运动的过程中
J Sullivan1, P Hanson, P S Rahko
1Department of Medicine, University of Wisconsin Medical School, Madison.
强烈的死提起最初会降低左心室的性能,但弗兰克-斯塔林机制会恢复它. 释放后,性能随着血压下降而增加,可能会导致缩.
科学领域:
- 心血管生理学心血管生理学
- 运动科学 运动科学
- 运动医学 运动医学
背景情况:
- 同度运动会使动脉血压升高,与强度和肌肉质量成比例.
- 举重运动对左心室 (LV) 功能的暂时影响尚不清楚.
研究的目的:
- 测量在使用站立死力运动的最大同位体运动期间LV性能的连续变化.
- 为了研究心血管系统对举重运动的即时反应.
主要方法:
- 十名健康的男子以50%和100%的最大自愿力度进行了死.
- 在运动和恢复期间记录了心声学,动脉血压监测和心电图.
- 还监测了大动脉流速.
主要成果:
- 在100%的努力下,平均动脉压从108升至164毫米升.
- LV 喷射分数最初下降,但由于末端透缩体积增加而恢复.
- 运动后,动脉压迅速下降,LV性能指数显著增加.
结论:
- 在强烈的截止日期期间,LV的表现最初会下降,但通过弗兰克-斯塔林机制恢复.
- 术后,增强的LV性能与快速降低的动脉压力相吻合.
- 增加的壁面应力和增强的收缩性可能会在体重训练中导致LV缩.
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