The short answer
If you have the symptoms and two proper blood tests say your testosterone is consistently low, you need a doctor. That conversation may end in TRT — and for men who are properly diagnosed, TRT at normal doses has clear benefits.1
If you haven't been tested properly, or you're carrying weight and sleeping five hours a night, the first move is the work upstream. That's what a coach does.
What counts as a diagnosis
The Endocrine Society is blunt about it: hypogonadism means symptoms plus consistently low, accurately measured total and free testosterone, confirmed on at least two early-morning, fasting tests.1
The American Urological Association uses a total testosterone below 300 ng/dL as a reasonable cut-off — again, only after two early-morning measurements on separate occasions.2 Irish labs usually report in nmol/L: 300 ng/dL is about 10.4 nmol/L.
One number from one test isn't a diagnosis. Neither is a symptom checklist on its own.
When the work comes first
Before anyone prescribes, the guidance is to rule out reversible causes — obesity, and medications such as corticosteroids or opioids.1 Where low testosterone is down to being overweight and there's no other cause, weight loss is typically the first-line treatment.1
The evidence behind that is solid. Across 24 studies, men who lost weight saw their testosterone rise, and the more they lost, the bigger the rise.3 Sleep counts too: one week of five-hour nights cut young, healthy men's daytime testosterone by 10–15%.4
Weight, sleep, training and what you let into your body are exactly what a coach works on. That's the whole job.
What a coach can't do
- Diagnose anything, or tell you whether your number is low.
- Prescribe, adjust or stop a medication.
- Stand in for a doctor when the tests say you need one.
If you want kids
Testosterone therapy affects sperm production. The AUA guideline says its long-term impact on sperm production should be discussed with any man interested in future fertility.2 Have that conversation before you start, not after.
Can you do both?
Yes. A man on TRT still has to train, sleep and eat like he means it — the prescription doesn't do that part. A coach works around the medication and never touches it. Tell your doctor you're working with one, and tell the coach what you're taking.
Don't test yourself into a prescription
The Endocrine Society says there isn't enough evidence to screen men who have no symptoms.1 A home kit and a clinic advert are not a diagnosis. If you're worried, see a doctor, get tested properly, then decide.