Definition: "An ergogenic aid is any substance or phenomenon that enhances performance "
Exercise burns up more fat after supplementing with cystine and glutamine
Athletes burn more fat and can sustain physical exertion for longer if they take a supplement containing the amino acids cystine and glutamine. According to researchers at Waseda University in Japan, the cystine-glutamine combination increases the concentration of glutathione in the muscle cell during exercise.
On another occasion, the men took a placebo containing only maltodextrin [PLA].
At the end of both the supplement and placebo periods, the men had to cycle for 60 minutes at an intensity of 70 percent of their maximum heart rate.
And this was probably the case, suggest experiments with mouse muscle cells in test tubes by the same researchers. The researchers exposed the muscle cells to the fatty acid palmitic and hydrogen peroxide [H2O2].
Hydrogen peroxide is a free radical. Free radicals are also released during exercise. By administering hydrogen peroxide, the researchers imitated the conditions under which muscle cells burn fat during exercise.
The muscle cells burned more fatty acids if the researchers also added cystine [Cys2] to the test tubes.
The Japanese suspect that supplementation with an extra building block weakens that process. As a result, after supplementation with cystine and glutamine, muscle cells function better during exercise and burn more fat.