Black Line Edge The enzyme that converts testosterone into estrogen. Male training You can force the body to produce a large amount of testosterone when you do compound exercises that train various muscle groups such as squats. Get sexually stimulated as much as possible When you sexually stimulate your testosterone levels soar, especially if you have already exceeded 40 years. Not stimulating or exciting you for long periods can actually decrease these levels and therefore make your erection difficult. Do not overheat the testicles Your testicles need to be approximately 34 or 35 degrees Celsius, 2 degrees cooler than your body temperature to function better and produce more testosterone. If you wear tight underwear, tight pants, take prolonged hot baths.