Athletes` motor performance is usually affected by the amount of energy supplied to them and the time and manner in which it is supplied. The purpose of this study is to determine whether or not application of a clinically prescribed herb medicine produces a high metabolic rate and promotes motor-revealing capacity in the body system. Subjects each undergo a routine C. B. C test and blood chemical test after they 5 ㏄ of blood is drawn from the antecubital vein with disposable syringes, which were all disinfected with heparin. Paired T-tests are given to test results, using the IBM PC and SAS package programs. Significant difference in every item is verified in the level of α=0.01 and some items also show significant difference within the level of α=0.001. Test results are seen in the following: 1. As to muscular strength, a significant difference in exercise tolerance and motor-revealing; capacity is seen after each subject takes two chartulae of a clinically prescribed herb medicine. 2. As to power, bloodless or lethargic athletes show a significant difference after each subject takes three chartulae of a clinically prescribed herb medicine. 3. Routine C. B. C, glucose, triglyceride and protein speed up exercise tolerance after each subject takes two chartulae of a clinically prescribed herb medicine. 4. Routine C. B. C, hemoglobin, hematocrit and glucose promote exercise tolerance and a significant difference is shown after each subject takes three chartulae of a clinically prescribed herb medicine.