Figure 2. Insulin Growth Factor-I (IGF-I) concentration before (rest) and at maximal intensity of exercise (max) in control group (CG), athletes with normal heart dimension (LVN), and athletes with heart hypertrophy (LVH) (mean ± SD). * and ** indicate p < 0.05 and 0.01 respectively rest vs. max; ## indicates p < 0.01 LVH vs. CG; § indicates p < 0.05 LVH vs. LVN.