Fig. 9From: Effects of a commercially available branched-chain amino acid-alanine-carbohydrate-based sports supplement on perceived exertion and performance in high intensity endurance cycling testsTotal and free Trp plasma concentrations. Trp levels were determined at pre-HIEC and at post-HIEC. Panels a and b show analyses performed at 1d and 9w, respectively. Key: pale grey bars show total Trp in the PL group; dark grey bars, the total Trp in the SU group; white bars, the free Trp in the PL group; black bars, the free Trp in the SU group. Data are reported as means ± standard deviation. # p < 0.05 per timeBack to article page