2. Increased Muscle Strength
Human growth hormone has been known to improve physical capacity of individuals through stimulating collagen synthesis in the skeletal muscle and tendons, increasing muscle strength and improving exercise performance as a result.
In the International Journal of Endocrinology, a study with 14 healthy men at the ages of 50 to 70 were randomized into two groups. Seven subjects were administered HGH therapy with seven placebo subjects, and they were re-evaluated after six months. After six months, there was a significant increase in the leg press responsiveness muscles in the growth hormone group.
Overall, the study concluded an increased muscle strength in the lower body after human growth hormone was administered in healthy men. In HGH-deficient adults, participants who were administered long-term HGH therapy experienced normalization of muscle strength, increased exercise capacity, and improved thermoregulation and body composition. (2)
3. Stronger Bones
The pituitary gland stimulates the release of growth hormone and is essential for regulating bone growth, especially during puberty. Growth hormone stimulates the production of IGF-1, which is produced in the liver and released in the blood. With age, human growth hormone decreases and may be the cause of older individuals not being able to form or replace bone rapidly. The IGF-1/growth hormone duo stimulates bone-forming and bone-resorbing cells, leading to increased bone mass. (6)
4. Reduced Cardiovascular Disease Risk
Adults who are growth hormone-deficient have an increased risk for cardiovascular disease, leading to decreased life expectancy. In Sweden, 104 patients who are growth hormone-deficient were studied for cardiovascular disease risk. These patients had higher body mass and triglyceride concentrations compared to controls. These results suggest lipoprotein metabolism is altered by growth hormone deficiency, increasing the risk for cardiovascular disease. (7)