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E. Ernst, MD
Hemorrheology Research Unit Clinic for Physical Medicine University of Munich

JAMA. 1985;253(20):2962-2963.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.—

The recent Olympic issue of THE JOURNAL which focused on cardiovascular and medical aspects of exercise provided information of unique value. Briefly, it was suggested that different forms of training are associated with favorable changes in lipoprotein patterns'^1,2 and that exercise level predicts cardiovascular risk.^3,4 Our own group has investigated the effects of exercise on blood rheology.

We studied a group of first-league soccer players, comparing them with age-matched sedentary persons (Table 1). We observed hemorrheological changes during a three-month vigorous training program (mean, four hours intensive exercise per day, seven days a week) in formerly sedentary volunteers (Table 2). The variables tested were blood and plasma viscosity,^5,6 hematocrit red cell deformability,⁷ and red cell aggregation.

In the interindividual comparison we saw significant differences in plasma viscosity and red cell deformability, implying enhanced blood fluidity in athletes (Table 1); in the intraindividual comparison, . . . [Full Text PDF of this Article]

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