Can intense exercise during menstruation cause endometriosis?
Intense physical exercise during menstruation usually does not directly cause endometriosis, but it may increase the risk of developing the condition. If severe menstrual pain or abnormal bleeding occurs, prompt medical attention is recommended.

During menstruation, the female pelvis is in a congested state. Vigorous activities such as running or jumping can increase abdominal pressure, elevate intrauterine pressure, disrupt the normal outflow of menstrual blood, and lead to retrograde flow into the fallopian tubes and pelvic cavity. Endometrial cells contained in this back-flowing menstrual blood may implant and grow within the pelvic cavity, forming ectopic lesions.
The development of endometriosis is associated with multiple factors including genetics and hormone levels, and intense exercise during menstruation is one important contributing factor. Prolonged vigorous activity during periods increases both the frequency and extent of retrograde menstruation, thereby raising the likelihood of successful implantation of endometrial cells and ultimately increasing disease risk—particularly among women with a family history of endometriosis.
During menstruation, mild activities such as walking or gentle yoga are recommended, while high-intensity exercise should be avoided. Keep the body warm during exercise, especially protecting the abdomen from cold exposure. Maintain a moderate exercise intensity that does not lead to fatigue, minimizing adverse effects on the body during menstruation.