Decreased Muscle + Strength
You start noticing that your strength seems to be fading. Lifting heavy items seems to be getting harder.
You might not work out as much as you used to, but there is nothing that you can think of to explain this loss of strength.
Studies have found that when a man is relatively inactive, he will lose one-half percent of muscle strength each year between the ages of twenty-five and sixty. After sixty, the rate of muscle loss doubles every ten years. While some decrease in strength can be attributed to age, some can be tied to a decrease in testosterone levels. In other words: as testosterone levels decrease, so does muscle mass.
Testosterone is a necessary component in gaining and retaining lean muscle mass. In a recent study, men, who used testosterone replacement for six months to bring testosterone levels into the “normal” ranges, experienced an increase in muscle mass by 2.5 pounds.