Oral contraceptives improve endothelial function in amenorrheic athletes

Area of Science:

• Sports Medicine
• Endocrinology
• Cardiovascular Physiology

Background:

• Athletic amenorrhea is linked to endothelial dysfunction and adverse lipid profiles.
• Estrogen deficiency in amenorrhea may contribute to these metabolic issues.
• Endothelial function and inflammation are critical in cardiovascular health.

Purpose of the Study:

• To investigate the impact of oral contraceptives (OCs) on endothelial function, lipid profiles, and inflammatory markers in amenorrheic athletes.
• To compare these effects with regularly menstruating athletes and sedentary controls.
• To assess the potential of estrogen substitution via OCs to mitigate negative metabolic consequences.

Main Methods:

• A 9-month study involving age- and BMI-matched groups: amenorrheic athletes, regularly cycling athletes, and sedentary controls.
• Evaluation of endothelial function using brachial artery flow-mediated dilatation (FMD).
• Analysis of lipid profiles and blood markers of inflammation (hs-CRP, TNF-α, VCAM-1) before and after OC treatment.

Main Results:

• Amenorrheic athletes showed the lowest baseline FMD, with the most significant improvement after OC treatment.
• FMD increased in controls but not in regularly menstruating athletes.
• OCs led to unfavorable lipid profile changes and mixed effects on inflammatory markers (increased hs-CRP, TNF-α; decreased VCAM-1).

Conclusions:

• Oral contraceptive treatment significantly benefits endothelial function in athletes with amenorrhea.
• OCs induce modest, potentially unfavorable, changes in lipid profiles and inflammatory markers.
• Estrogen-containing OCs may offer a therapeutic option for improving vascular health in amenorrheic athletes.