We also assessed the variations between preexercise and postexercise values in plasma levels of muscle damage markers, such as LDH, CK, CK-MB, myoglobin, and troponin (Table 1). Notably, at rest mean plasma concentrations of LDH were higher than normal reference values, while CK, CK-MB, myoglobin, and troponin levels were found to fall in the normal reference range. However, the levels of all muscle damage markers, except troponin, were found to be significantly increased after exercise in comparison with those measured before exercise.