Stopping Anabolic Steroids Reverses Heart Muscle Thickening, Study Finds

Complete cessation of anabolic-androgenic steroids (AAS) is the only confirmed path to reversing structural heart damage in long-term users, according to a decade-long follow-up study. Research conducted by Oslo University Hospital indicates that while chronic steroid use leads to severe heart muscle thickening and weakened pumping, stopping the drugs entirely can return heart mass to normal levels within 10 years.

The study, published in the journal European Heart Journal – Cardiovascular Imaging on October 13, 2026, highlights a critical distinction between total abstinence and “harm reduction” strategies. Researchers found that weightlifters who simply reduced their dosage, rather than quitting, saw no significant improvement in cardiac health. This suggests that the heart remains under pathological stress as long as anabolic-androgenic steroids are present in the system, even at lower levels.

The study observed significant reverse remodeling of the heart in participants who quit steroid use.

The Impact of Complete Cessation

The longitudinal research tracked weightlifters who had previously participated in studies between 2017 and 2019. The 10-year follow-up provided a rare perspective on the heart’s ability to undergo “reverse remodeling”—the process of the heart muscle shrinking back to its healthy size after being unnaturally enlarged.

In participants who completely stopped using steroids, the left ventricular mass index (LVMI) fell by an average of 19%. Measurements dropped from 112 g/m² to 91 g/m², effectively matching the heart mass of control groups who had never used performance-enhancing drugs. This recovery signifies that the structural thickening caused by AAS is not necessarily permanent if the stimulus is removed entirely.

Risks for Continued Users

The outlook for those who maintain steroid use is significantly more concerning. The study identified that approximately 17% of continued users suffered from substantially reduced heart function. This group showed a persistent inability of the heart to pump blood efficiently, a condition that can lead to heart failure over time.

The findings directly challenge the efficacy of tapering or “cycling” as a means of protecting the cardiovascular system. Because dose reduction was not associated with any measurable improvement in heart condition, the researchers emphasized that medical interventions should prioritize total discontinuation.

While the study offers a path to recovery for former users, it also reinforces the persistence of damage among those who do not quit. The structural changes observed in the hearts of active users—specifically the thickening of the left ventricle—serve as a primary marker for long-term cardiovascular disease risk in the weightlifting community.

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