The image above is a Medical Test Result of one of Grandmaster Tu’s student. He is  70 years old. Prior to learning Iron Crotch, his testosteron level was in the 350 zone which is very normal for men his age. As men get older their testosterone level will decrease with age. After practicing Iron Crotch for only a year, he returned for his annual check up with his doctor. His doctor was astound by the increase in his testosteron level.  The average testosteron level of a man his age was about 350. But his testosterone level was 529 almost 600 which is consider quite high for someone his age. This shows that practicing Iron Crotch can increase your testosteron level even in elderly man.