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NSAIDs are commonly used by professional and recreational athletes to both reduce existing and/or prevent anticipated exercise induced musculoskeletal pain
NSAIDs have potential hazardous effects on the gastrointestinal (GI) mucosa during strenuous physical exercise
Potential effects include mucosal ulceration, bleeding, perforation. and short-term loss of gut barrier function in otherwise healthy individuals
Intense exercise by itself has previously been shown to induce small intestine injury
Human intestinal fatty acid binding protein (1-FABP) is a protein found in mature small bowel enterocytes which diffuses into the circulation upon injury
Ibuprofen and endurance exercise (cycling) independently result in increased 1-FABP levels
When occurring together, ibuprofen ingestion with subsequent exercise causes significantly increased small bowel injury and intestinal permeability
Small bowel injury was found to be reversible in 2 hours
Taking empiric NSAIDs before endurance exercise may be an unhealthy practice and should be discouraged in the absence of a clear medical indication
References
Aggravation of exercise-induced intestinal injury by Ibuprofen in athletes. VAN Wijck K, Lenaerts K, VAN Bijnen AA, et al. Med Sci Sports Exerc. 2012 Dec;44(12):2257-62.