Long distance training associated to HIIT protocol does not induce changes in blood biochemical markers in adult marathoners

ABSTRACT

Objective:

to verify blood markers during a 12-week training protocol and after Sao Paulo Marathon.

Methods:

Blood samples of 9 male marathoners were collected before (C1) and after (C2) 12-week training protocol, before (C3) and after (C4) marathon. Muscle and liver damage markers (creatine kinase [CK-MM], aspartate aminotransferase [AST], alanine aminotransferase [ALT]), oxidative stress levels (thiobarbituric acid reactive substances [TBARS]) and serum iron concentration were measured.

Results:

changes were identified comparing moment C4 to other moments for CK-MM and iron. For AST, ALT, and TBARS no differences were identified.

Conclusion:

strenuous exercises might elicit changes on blood markers, needing follow up strategies to avoid impairments to athletes’ performance and health.

Keywords:
Liver damage; Muscle damage; Blood biomarkers; Sports Science