No surprise here, bodybuilders on steroids rupture tendons more often.  I don’t think anyone needed science to prove this but here is the latest study confirming what the culture already knew.

If it is not obvious, this happens because muscle growth happens quickly in steroid users.  Often much more quickly than one’s tendons can strengthen.  Thus leading tears, pulls and everything else that impedes your precious lifting.

Thankfully they indicated all the ruptures were successfully surgically repaired.  Needless to say that pec tear might still look a little odd when you are single digit body fat.

P.S. The picture of IFBB Pro Evan Centopani is not actually a pec tear.

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Ruptured Tendons in Anabolic-Androgenic Steroid Users: A Cross-Sectional Cohort Study.

Am J Sports Med. 2015 Sep 11;

Authors: Kanayama G, DeLuca J, Meehan WP, Hudson JI, Isaacs S, Baggish A, Weiner R, Micheli L, Pope HG

Abstract
BACKGROUND: Accumulating case reports have described tendon rupture in men who use anabolic-androgenic steroids (AAS). However, no controlled study has assessed the history of tendon rupture in a large cohort of AAS users and comparison nonusers.
HYPOTHESIS: Men reporting long-term AAS abuse would report an elevated lifetime incidence of tendon rupture compared with non-AAS-using bodybuilders.
STUDY DESIGN: Cohort study; Level of evidence, 3.
METHODS: Medical histories were obtained from 142 experienced male bodybuilders aged 35 to 55 years recruited in the course of 2 studies. Of these men, 88 reported at least 2 years of cumulative lifetime AAS use, and 54 reported no history of AAS use. In men reporting a history of tendon rupture, the circumstances of the injury, prodromal symptoms, concomitant drug or alcohol use, and details of current and lifetime AAS use (if applicable) were recorded. Surgical records were obtained for most participants.
RESULTS: Nineteen (22%) of the AAS users, but only 3 (6%) of the nonusers, reported at least 1 lifetime tendon rupture. The hazard ratio for a first ruptured tendon in AAS users versus nonusers was 9.0 (95% CI, 2.5-32.3; P < .001). Several men reported 2 or more independent lifetime tendon ruptures. Interestingly, upper-body tendon ruptures occurred exclusively in the AAS group (15 [17%] AAS users vs 0 nonusers; risk difference, 0.17 [95% CI, 0.09-0.25]; P < .001 [hazard ratio not estimable]), whereas there was no significant difference between users and nonusers in risk for lower-body ruptures (6 [7%] AAS users, 3 [6%] nonusers; hazard ratio, 3.1 [95% CI, 0.7-13.8]; P = .13). Of 31 individual tendon ruptures assessed, only 6 (19%) occurred while weightlifting, with the majority occurring during other sports activities. Eight (26%) ruptures followed prodromal symptoms of nonspecific pain in the region. Virtually all ruptures were treated surgically, with complete or near-complete ultimate restoration of function.
CONCLUSION: AAS abusers, compared with otherwise similar bodybuilders, showed a markedly increased risk of tendon ruptures, particularly upper-body tendon rupture.

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