Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA.
Med Sci Sports Exerc. 2019 Oct;51(10):2058-2066. doi: 10.1249/MSS.0000000000002014.
Vascular function and blood flow responses to upper limb exercise are differentially altered in response to different exercise training modalities. Rowing is a unique exercise modality that incorporates the upper limbs and can significantly augment upper limb endurance, strength, and power capacity.
This study sought to determine whether vascular function and blood flow regulation during handgrip exercise are altered in row-trained males.
Nine young row-trained males (ROW, 20 ± 1 yr; V˙O2peak = 51 ± 2 mL·kg·min) and 14 recreationally active male controls (C: 22 ± 1 yr; V˙O2peak = 37 ± 2 mL·kg·min) were recruited for this study. Subjects performed multiple bouts of progressive rhythmic handgrip exercise. Brachial artery (BA) diameter, blood flow, shear rate, and mean arterial pressure were measured at rest and during the last minute of each exercise workload.
Resting values for BA diameter, blood flow, shear rate, and mean arterial pressure were not different between groups. During handgrip exercise, the ROW group reported significantly lower BA blood flow (ROW vs C: 4 kg [146 ± 21 vs 243 ± 13 mL·min], 8 kg [248 ± 29 vs 375 ± 17 mL·min], 12 kg [352 ± 43 vs 490 ± 22 mL·min]) across all workloads when compared with controls. The examination of BA dilation, when controlled for the shear rate stimulus and evaluated across all workloads, was revealed to be significantly greater in ROW group versus controls.
This study revealed that vascular function and blood flow regulation were significantly different in row-trained males when compared with untrained controls evidenced by greater shear-induced BA dilation and lower arm blood flow during progressive handgrip exercise.
血管功能和血流对上臂运动的反应会因不同的运动训练方式而不同。划船是一种独特的运动方式，它包含上肢，可以显著增强上肢的耐力、力量和力量能力。
本研究旨在确定划船训练的男性在进行握力运动时血管功能和血流调节是否发生变化。
招募了 9 名年轻的划船训练男性（ROW，20±1 岁；V˙O2peak=51±2 mL·kg·min）和 14 名有规律运动的男性对照组（C：22±1 岁；V˙O2peak=37±2 mL·kg·min）。受试者进行了多次渐进性有节奏的握力运动。在休息时和每次运动负荷的最后 1 分钟测量肱动脉（BA）直径、血流、剪切率和平均动脉压。
BA 直径、血流、剪切率和平均动脉压的静息值在两组之间没有差异。在握力运动期间，与对照组相比，ROW 组报告的 BA 血流明显较低（ROW 与 C：4 kg[146±21 与 243±13 mL·min]，8 kg[248±29 与 375±17 mL·min]，12 kg[352±43 与 490±22 mL·min]）在所有负荷下。当控制剪切率刺激并在所有负荷下评估时，BA 扩张的检查显示 ROW 组明显大于对照组。
与未经训练的对照组相比，划船训练的男性血管功能和血流调节明显不同，表现在渐进性握力运动中，BA 扩张的剪切诱导更大，手臂血流量更低。
