Effect of Long-Term Exercise Training on Blood Viscosity During Endurance Exercise at an Anaerobic Threshold Intensity

概要

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Blood viscosity (η_B) is low in athletes, but the effect of exercise training on η_B during endurance exercise at an anaerobic threshold (AT) intensity in non-athletes is not well known, although it is known that exercise training sometimes induces the hyperviscosity syndrome. Fourteen subjects were recruited and divided into 2 groups: those who trained at an AT intensity for 30 min/day, 3 times weekly for 1 year (Group T, n=8), and sedentary subjects (Group C, n=6). The test protocol consisted of a single 30-min treadmill exercise at each individual's AT intensity, which was determined in advance. The η_B, Plasma viscosity (η_p), and hematocrit were measured just before and at the end of the treadmill exercise. The subjects were not allowed to drink any water before exercise. In the Group C subjects, the hematocrit and η_p increased significantly and the η_B tended to increase. However, in the Group T subjects, the hematocrit and η_p did not increase and the η_B decreased significantly These data indicate that long-term exercise training attenuates the increase in blood viscosity during exercise.
社団法人日本循環器学会の論文
2000-10-20