Exercise induced serum enzyme changes in untrained subjects.

The serum enzyme values (GOT, GPT, LDH and Aldolase) of 13 fit healthy volunteers were determined before and after physical effort of a moderate grade of 3.9 Kcal/min. The pulse rate pattern of the subjects during the exercise of climbing up and down a staircase for 30 minutes and during a 10 minute recovery phase was also recorded. The pulse pattern was in no case in excess of 150 bpm and full recovery was achieved within 10 minutes indicating that the exercise was moderate. The serum enzyme values after the exercise were raised. The difference between the exercise and rest values of the four enzyme activities were significant at the 1% level. It was observed that the raised enzyme activity level dropped to normal levels within 24 hours after the exercise. Large individual variations in the rise of these enzyme levels after exercise were observed and hence it is difficult to quantitate the phenomenon. Consequently the value of serum enzyme levels after the exercise as a practical-index of physiological strain is limited.