Pamukkale University, Physical Therapy and Rehabilitation Highschool, Kinikli, Denizli, Turkey.
Pamukkale University, Faculty of Medicine, Department of Physiology, Kinikli, Denizli, Turkey.
Clin Hemorheol Microcirc. 2019;71(4):463-473. doi: 10.3233/CH-180402.
The Nordic hamstring exercise (NHE) has been proven to be an effective preventive technique for hamstring injuries. Hemorheological parameters (erythrocyte deformability and aggregation) play a critical role in exercise influencing oxygenation. Although previous studies presented hemorheological alterations induced by different types of exercise, changes in red blood cell (RBC) deformability and aggregation following NHE remain unknown. Present study was designed to explore possible alterations in hemorheological and oxidative parameters after an acute bout of NHE.
10 healthy, male, active students (mean age 19.9±0.23, BMI: 21.56±0.54) participated to the study. They performed a single session of seven-repetitions of NHE followed by a familiarisation period. Blood samples were obtained before and immediately after the exercise from the antecubital vein. Hemorheological parameters were measured by an ektacytometer.
NHE did not change deformability, hematocrit and oxidative stress but, increased RBC aggregation index (AI, p = 0.011) and decreased RBC aggregation half time (t½, p = 0.009).
Our results suggest that, increased RBC aggregation following an acute bout of NHE may result in increased plasma skimming and thus ease the flow of blood.
北欧腘绳肌训练（NHE）已被证明是预防腘绳肌损伤的有效方法。血液流变学参数（红细胞变形性和聚集性）在运动影响氧合方面起着关键作用。尽管先前的研究提出了不同类型运动引起的血液流变学改变，但 NHE 后红细胞（RBC）变形性和聚集性的变化尚不清楚。本研究旨在探讨单次急性 NHE 后血液流变学和氧化参数可能发生的变化。
10 名健康、男性、活跃的学生（平均年龄 19.9±0.23，BMI：21.56±0.54）参与了这项研究。他们进行了 7 次 NHE 重复的单次训练，然后进行了熟悉期。从肘前静脉在运动前和运动后立即采集血液样本。血液流变学参数通过 ektacytometer 进行测量。
NHE 没有改变变形性、血细胞比容和氧化应激，但增加了红细胞聚集指数（AI，p=0.011）和减少了红细胞聚集半衰期（t½，p=0.009）。
我们的结果表明，急性 NHE 后红细胞聚集增加可能导致血浆撇除增加，从而使血液流动更容易。
