This cause is the generation of new muscle fibers, studies show that increased muscle bodybuilding athletes must be more than Hypertrophy hyperplasia. 10 From the standpoint of metabolic hypertrophy can be seen as a synthesis of proteins , a cessation of degradation or a combination of both processes. Experiments with different athletes have shown that protein synthesis is growing at 112%, 65% and 34% after spending 3 hours, 24 and 48 exercise. 11 Conversely in these tests break peptide bonds (protein oxidation) grew at a rate of only 31%, 18%, 1%.