Dehydroepiandrosterone(DHEA) and testosterone are two hormones that play key roles in the body and have a complex and close relationship with each other. DHEA is produced primarily by the adrenal glands and is a precursor hormone that can be converted into testosterone and estrogen. The DHEA levels generally decline gradually with age, a phenomenon …

There is no doubt that exercise training benefits a lot to physical fitness. The mass and strength of men's muscles peak around the age of 30, losing 115% per decade from the age of 50 until the age of 70, when their strength is about 30% of that of 30. About 50% of men …