A recent study of male bodybuilders found that abusers of anabolic-androgenic steroids (AAS), compared with otherwise similar bodybuilders, showed a markedly increased risk of tendon ruptures, particularly upper-body tendon rupture.Man lifting weights at gym

142 experienced male bodybuilders aged 35 to 55 years were included in this study. 88 reported at least two years of cumulative lifetime anabolic-androgenic steroids (AAS) use, and 54 reported no history of AAS use. Of these, nineteen (22%) of the AAS users, but only 3 (6%) of the nonusers, reported at least one lifetime tendon rupture. Several men reported two or more lifetime tendon ruptures. Interestingly, upper-body tendon ruptures occurred exclusively in the AAS group (15 [17%] AAS users vs 0 nonusers).

Source: American Journal of Sports Medicine, published online September 11, 2015