Cardiovascular drift during low intensity exercise with leg blood flow restriction
Cardiovascular drift during low intensity exercise with leg blood flow restriction
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DOI：
10.1556/aphysiol.99.2012.4.3
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发表时间：
2012-12-01
影响因子：
--
通讯作者：
Abe, T.
中科院分区：
文献类型：
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作者：
Kumagai, K.;Kurobe, K.;Abe, T.
以前的研究报告说，有氧运动，如步行或骑自行车与血流限制（BFR）已被证明会引起腿部肌肉肥大和力量的增加，以及改善有氧能力。尽管先前的研究调查了相对较短的运动持续时间（类似于5分钟）期间的心血管反应，但长期腿部肌肉BFR的影响仍然未知。本研究的目的是检查较长时间低强度运动结合BFR对心血管的影响。八名男子进行了30分钟的运动，在40%的预定最大摄氧量下BFR和正常流量（CON）的条件。在休息时和运动期间每10分钟测量一次心血管参数。结果表明：（1）BFR和CON在运动10 ~ 30 min时，SV和HR无明显变化，但与正常血流相比，运动10 min时BFR引起SV减少和HR增加;（2）BFR在运动10 min时血压升高，运动10 ~ 30 min时血压随BFR的增加而逐渐下降; 3）运动10 ~ 30 min时血乳酸和RPE逐渐升高。总之，我们的结果表明，运动前10分钟内BFR诱导的SV减少和HR增加代表了这些参数的变化。
Previous studies reported that aerobic-type exercise such as walking or cycling with blood flow restriction (BFR) has been shown to elicit increases in leg muscle hypertrophy and strength, as well as improved aerobic capacity. Although previous studies investigated cardiovascular responses during a relatively short duration of exercise (similar to 5 min), the effects of prolonged leg muscular BFR have remained unknown. The purpose of this study was to examine the cardiovascular effects of longer duration low intensity exercise combined with BFR. Eight men performed 30 min of exercise at 40% of a predetermined maximal oxygen uptake under both BFR and normal flow (CON) conditions. Cardiovascular parameters were measured at rest and every 10 min during exercise. The main findings were that 1) the SV and HR did not change significantly between 10 to 30 min of exercise in BFR and CON conditions, although BFR-induced reduction of SV and increased HR were found at 10 min exercise compared with normal flow, 2) blood pressure was increased at 10 min of exercise in BFR compared to the CON, however the blood pressure decreased gradually with BFR from 10 to 30 min of exercise, and 3) blood lactate and RPE increased gradually during exercise with BFR. In conclusion, our results suggest that the BFR-induced reduction of SV and increased HR within the first 10 min of exercise are representative of changes in these parameters.