Plasma levels of lactic dehydrogenase (LDH) activity, creatine kinase (CK) activity, creatine kinase-MB (CK-MB), myoglobin (MGB), and troponin, as markers of muscle damage, were assessed by Siemens autoanalyzers (ADVIA 1800 and Centaur XP Siemens, Healthcare Diagnostics, Germany) using the appropriate reagent kit of the same company (Siemens, Healthcare Diagnostics, Germany). Reference ranges for these markers were LDH 140–280 U/L; CK ≤ 170 U/L; CK-MB ≤ 6.5 ng/mL; myoglobin ≤ 90 ng/mL; troponin ≤ 40 ng/mL.