Testosterone
Testosterone is one of the most important hormones in building muscle mass. In the male human body, it is produced mainly in the testicles and a small amount in other glands. In the female human body it is produced in the ovaries. Men have significantly higher testosterone levels than women.
It is directly responsible for your sex drive and plays a great role in sperm production. It has a great role in creating muscle mass and bone density and influences how much fat your body will store. This hormone levels influence mood as well.
Testosterone is one of the most important factors influencing the formation of muscle mass and strength. It stimulates tissue growth and influences the Human Growth Hormone.
It increases bone density and influences the production of red blood cells (cells in the blood that carry oxygen from the lungs to other parts of the body). Men with low T-levels are prone to have bone fractures.
Testosterone plays role in how the body will treat fats and helps it burn fat more efficiently. Low T-levels can bring about increased formation of body fat, “man boobs”, etc. Low T-levels in men means higher estrogen levels (the main female hormone).
Proper weight training stimulates higher testosterone levels in the body. Nutrition and sleep have enormous influence on this as well. With higher T-levels it is much easier and faster to build muscle mass. Resistance training is a method of stimulating the production of this and other hormones which stimulate building of muscle mass and formation of stronger and more aesthetic muscular structure.
Read about the other hormones