Fig. 7From: Effects of a commercially available branched-chain amino acid-alanine-carbohydrate-based sports supplement on perceived exertion and performance in high intensity endurance cycling testsCreatine kinase (CK) serum blood levels. CK was determined at the indicated time points at 1d (a) and 9w (b) in the SU (black dots) and PL groups (white dots); * p < 0.05 as compared to PL; # p < 0.05 as compared to an earlier time pointBack to article page