Weight-loss drugs raise concerns in elite sports — image accompanying Canadian Running's report. Image accompanying Canadian Running’s report; reduced and presented for news commentary with the attributed report. View the complete source report.
New research indicates weight-loss drugs are used by athletes without medical need. The study surveyed 114 physicians across 38 countries. One in 10 reported athletes using these drugs without a medical reason.
GLP-1 drugs, like semaglutide and tirzepatide, mimic hormones for blood-sugar control and appetite. They were initially developed for diabetes treatment but later approved for weight loss. These drugs can cause substantial weight loss, appealing to athletes. Read more gear coverage.
For runners, the concern is appetite suppression, which can lead to low energy availability. This can contribute to RED-S, impacting bone health, hormones, metabolism, recovery, and performance. Related: New Balance SuperComp Elite v6: Redesigned for Speed.
This original Runner World brief is based on reporting from Canadian Running. Visit the source for its complete reporting, context and any later corrections.
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What should runners know about Weight-loss drugs raise concerns in elite sports?
Research shows athletes using weight-loss drugs without medical need New research indicates weight-loss drugs are used by athletes without medical need. The study surveyed 114 physicians across 38 countries. One in 10 reported athletes using these drugs without a medical reason.
When did Runner World publish this gear brief?
Runner World published this brief on August 10, 2026. The underlying Canadian Running report was dated August 10, 2026.
Where can readers find the complete original report?
This summary is based on reporting from Canadian Running. The attributed source link in the article leads to the publisher’s complete report.
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