Changing one's weight for athletic performance is hardly a new thing.
Promote muscle cell growth. Can improve muscle strength and endurance and the body to enhance athletic performance. Enhance the explosive muscle. Anti-fatigue effect is obvious.
Human growth hormone never has been approved for cosmetic or anti-aging USES, or to improve athletic performance.
But sometimes though athletes training for a large volume of training time is also long enough to really improve athletic performance is very slow, difficult to find effective ways.
Photochemical oxidants have been associated with impaired athletic performance in healthy cross-country runners.
The concern is that respiratory problems could impede athletic performance and prevent records from being broken.