Is Testosteron Test useful for Sport?

A single testosterone test is rarely useful for sport optimization. Testosterone levels fluctuate significantly with time of day, diet, and training. Without clinical symptoms (e.g., loss of libido, fatigue), a one-off measurement does not reliably indicate overtraining or performance potential. Evidence for routine hormone testing in healthy athletes is weak. More actionable are regular blood counts, creatine kinase, and possibly cortisol profiles under sports medicine guidance. Case-based hormone analysis may be indicated if hypogonadism or overtraining is suspected, but not as general screening.