Between the ages of 30 and 80 testosterone levels in men decline; levels can reach as low as 20 percent of what it was during a male's youth. A decrease in testosterone can lead to a number of illnesses such as heart disease and diabetes. There are a number of ways in which you can increase the levels of testosterone in your body and weight lifting is one of them.
The body responds to large compound movement exercises by producing testosterone. Weightlifting also activates production of the stress hormone cortisol which cancels out testosterone, to avoid this keep weight lifting routines under 60 minutes.
Weight bearing exercises aid in increasing testosterone levels. To gain maximum advantage you should concentrate on performing exercises for large muscle groups. The body responds to heavy weights by releasing the human growth hormone which allows you to lift heavier weights; therefore, focus on using heavy weights performing five repetitions. Examples of compound exercises include bench presses for the chest, squats for the legs and barbell curls for the biceps.
Testosterone also aids in the production of lean muscle tissue, your body will burn more calories with excess muscle because muscle is an active tissue and requires maintenance.