It has been suggested that the weight reduction practices of wrestlers results in kidney and liver problems. To observe the effect of wrestlers' weight reduction, diagnostic tests for kidney and liver problems were done on the blood and urine samples of 22 college wrestlers over the course of a wrestling season. Results obtained after reduction to wrestling weights were compared with those obtained when there was no special effort to reduce. Results indicated that (1) there was no evidence of liver damage or impairment; (2) no trend toward significant change was seen in any test during the study; and (3) all changes seen following reduction to minimal weight disappeared after periods of normal eating and drinking for several days. (MM)