Testosterone is the primary male hormone in all mammals. Produced primarily in the testes, it is responsible for the development of adult male characteristics, such as facial hair, increased strength, larger muscle mass, as well as sexual drive. It has been tied to male aggression, but also to ambition, and remains a point of contention regarding male personality. Testosterone levels begin to decrease in earnest during the middle age years and continues throughout the rest of a man's life. This decrease has been tied to a number of health issues, including osteoporosis, loss of libido, inability to have an erection and decreasing muscle mass. Aside from a testosterone replacement therapy, there are a number of ways to increase testosterone with natural methods.
Regular Sleep
A fatigued body has greater difficulty performing normal functions, including testosterone production. Testosterone levels increase while the body sleeps and regular sleep helps to maintain a healthy testosterone level, so be sure to get plenty of rest.
Weight
In overweight men, those 20 to 30 percent above ideal body mass, the body's production of testosterone begins to decrease. Losing excess weight can help to boost testosterone levels.