SERUM ENZYME-ACTIVITIES FOLLOWING LONG-DISTANCE RUNNING - COMPARISON BETWEEN ETHIOPIAN AND WHITE ATHLETES

Ethiopian runners are famous for their achievements in long-distance r unning. The recent immigration of Ethiopians to Israel provided an opp ortunity to compare some physiological variables between elite Ethiopi an and white Israeli runners. Six Ethiopian and five white Israeli run ners, aged 20 to 40 years, were studied before and after an 11 km race . Venous blood was sampled from each runner prior to the race, and 1 h , 48 h, and 5 days following the race. The activities of creatine kina se (CK), lactate dehydrogenase (LDH) and aspartate aminotransferase (A ST) were measured, and levels of serum electrolytes, urea, creatinine, phosphorus, albumin, cholesterol, and alkaline phosphatase were also determined. CK activity rose 2.6-fold with a peak 5 days after the rac e. LDH and AST levels rose as well (1.4-1.3-fold, respectively). Signi ficant elevations also occurred in serum phosphorus, uric acid, and cr eatinine concentrations 1 h after the race. In contrast to previous st udies in which higher enzyme activities were reported in blacks, we di d not detect any difference in serum enzyme values between black and w hite runners.