Fig. 4From: Effect of Repeated Whole Blood Donations on Aerobic Capacity and Hemoglobin Mass in Moderately Trained Male Subjects: A Randomized Controlled TrialHemoglobin mass and serum erythropoietin. Evolution of the hemoglobin mass (a) and serum erythropoietin (EPO, b) levels before and after each of the three test series in the placebo and donation groups. Data are expressed as means ± SEM. n = 3 in placebo and n = 7 in donation for test series 1, 2, and 3. ## p < 0.01 vs. -1w of test series 1, same group. *p < 0.05, **p < 0.01, ***p < 0.001 vs. -1w of the same test series, same groupBack to article page