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Med Sci Law. 2004 Jul;44(3):197-200.

Changes in blood viscosity with heavy and light exercise.

Author information

1
Department of Legal Medicine, Dokkyo University School of Medicine, Mibu, Tochigi, Japan. hitosugi@dokkyomed.ac.jp

Abstract

To clarify the relationship of the intensity of acute exercise to sudden cardiac death, we examined the effects of short-term heavy and light exercise on whole blood viscosity. Nine healthy sedentary male volunteers performed ten minutes of heavy (more than 95% of maximum oxygen consumption) or light (60% to 65% of maximum oxygen consumption) exercise. Blood samples were obtained before, immediately after, and one hour after exercise. The whole blood viscosity was immediately examined with an oscillation-type viscometer and was found to increase significantly after exercise and subsequently return to baseline levels within one hour after exercise. The whole blood viscosity increased by a similar degree after heavy or light exercise. Therefore, our results suggest that there is a similar risk of sudden cardiac death, due to increased whole blood viscosity, after short-term heavy or light exercise.

PMID:
15296241
DOI:
10.1258/rsmmsl.44.3.197
[Indexed for MEDLINE]

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