Increased Body Fat. The loss of muscle mass and energy caused by low T can precipitate an increase of body fat. This is because there is less energy to burn fat, so it accumulates. Less muscle also means less thermogenic activity, which is basically an increase in body temperature during exercise that burns fat. Losing fat through exercise becomes much more difficult as testosterone levels drop. Some men with low T develop gynecomastia, which is a condition in which the breasts enlarge.
