In the following days, Li Ang constantly tested the specific strength of the "Gland Stimulation Method—Adrenaline" ability.
Normally, his physiological functions were about the same as an average professional athlete. However, after injecting Adrenaline, his performance could compare with that of a national athlete, even reaching the level of world championship contenders.
In other words, as long as he used this skill, Li Ang could achieve the peak of human physiological abilities.
Of course, the side effects were quite severe: his whole body trembling, difficulty breathing, bloodshot eyes, profuse cold sweats exuding from within, a racing heartbeat that could even lead to arrhythmias, a strong sense of nausea from his stomach, and a horrible headache comparable to having one's head stuck in a water mill.