Abstract
The effects of daily training on muscle tissue damage, intravasucular hemolysis and lipid peroxidation were determined in 8 long distance runners. The training consisted of 1) continuous running covering 15km on the road, 2) three sets of 5,000m-interval running followed by 6-minute jogging, and 3) cross-country running covering 14km on the undulating golf course. The duration of each training session was approximately 60 minutes.
Blood samples were drawn from the long distance runners at rest early in the morning, several minutes after each training and the next morning. Serum HPG concentrations were significantly lower than the control values (76.3±59.2mg/dl) after the post-continuous and interval running (65.5±53.5 and 53.0±47.3mg/dl, respectively). All post training values of serum MDA concentrations were significantly increased from the resting-time values. Significant increases were noted in post-training CK and CK-MB activities except after continuous running. Serum MDA and CK activities were significantly correlated with the relative intensity of training. In addition, the variables of individual changes were significantly correlated with each other. Taking into account the slower time course of CK activity, the serum MDA concentration was considered to be useful as an objective indicator for evaluating the individual demand for training.
