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Extremely Low Testosterone Due To Relative Energy Deficiency In Sport: A Case Report, Ana Narla, Kimberly Kaiser, Lisa R. Tannock
Extremely Low Testosterone Due To Relative Energy Deficiency In Sport: A Case Report, Ana Narla, Kimberly Kaiser, Lisa R. Tannock
Orthopaedic Surgery and Sports Medicine Faculty Publications
Objective: Recognize extremely low testosterone due to hypothalamic dysfunction from overtraining syndrome in a male athlete with relative energy deficiency in sport (RED-S).
Methods: Clinical and laboratory information are described.
Results: A 20-year-old male division I collegiate swimmer was found to have strikingly low total, free, and bioavailable testosterone levels with normal sex hormone–binding globulin and inappropriately normal follicle-stimulating hormone and luteinizing hormone. Lab testing ruled out hyperprolactinemia and hypothyroidism as etiologies, and pituitary imaging was normal. A diagnosis of RED-S was made, and the patient worked with the sports medicine team to increase nutrition and modify physical activity. His …