Apart from the many roles of Testosterone, Testosterone is responsible for increased muscle mass. Leaner body mass helps control weight and increases energy. It’s likely you’ll see the most benefits when you combine testosterone therapy with strength training and exercise. Stronger bones - Testosterone plays a huge role in bone mineral density. Bone density decreases as men age and testosterone levels drop. This raises the risk of weak bones and osteoporosis. Strong bones help support your muscles and internal organs, which can boost athletic performance. Research shows that bone density increases with testosterone treatment as long as the dose is high enough. Clinical on the effect of testosterone on bone density found increases in spinal and hip bone density.