TRT and training: separating gym lore from clinical evidence

What did @nm_training actually say?

The creator's argument is simple: TRT means testosterone replacement therapy, and the word "replacement" is doing real work there. If your testosterone isn't clinically low, you're not replacing anything. "If you're not using it for a therapeutic reason, you're not on TRT," they said. Anyone using testosterone to get bigger or leaner is, in their words, using it for "performance enhancing" or "cosmetic" reasons. The frustration is real, and honestly, the core point isn't wrong.

This is a terminology argument more than a medical one, but terminology matters in medicine. Calling elective testosterone use "TRT" conflates a regulated medical treatment for a diagnosed condition with off-label or non-prescribed use. That distinction has real implications for how people understand risk, side effects, and what they're actually doing to their bodies.

Does the science back this up?

Mostly, yes. The clinical definition of TRT is fairly consistent: it refers to testosterone administration in men with hypogonadism, a condition defined by persistently low serum testosterone plus symptoms. The American Urological Association (Mulhall et al., 2018, Journal of Urology) sets a threshold of total testosterone below 300 ng/dL alongside symptoms like fatigue, low libido, and mood changes as the diagnostic standard for treatment.

That's a meaningful bar. Studies estimate true hypogonadism affects roughly 2-4% of men (Araujo et al., 2007, Archives of Internal Medicine), though some broader definitions push that number higher. The point is: most men calling their testosterone use "TRT" on social media almost certainly don't meet clinical criteria. The creator is right that the label is being applied loosely, and that looseness matters when people make decisions based on assumed medical equivalence.

What did they get wrong (or right)?

They got the core distinction right. Where it gets a bit thin is the framing that there's a perfectly clean line between therapeutic and non-therapeutic use. In practice, that line is blurrier than the video implies.

First, "optimal" testosterone isn't a fixed number. The creator mentions getting back to how you felt "when you were 25," but that's not how TRT guidelines work. Clinicians treat symptoms at a population threshold, not at a personal historical baseline. Second, some men in the low-normal range (say, 280-350 ng/dL) do experience significant symptoms and may benefit from treatment. Whether that counts as "therapeutic" gets genuinely complicated (Bhasin et al., 2018, New England Journal of Medicine). Third, the video doesn't acknowledge that some legitimate TRT patients also experience body composition changes, which blurs the cosmetic-versus-medical framing.

Still, none of that undermines the main point. Calling recreational or performance-based testosterone use "TRT" is inaccurate, and the creator deserves credit for saying so plainly.

What should you actually know?

If you're considering testosterone therapy for any reason, the starting point is a blood test, not a TikTok video. Total testosterone, free testosterone, LH, FSH, and a symptom evaluation are the baseline. A single low reading isn't enough. Guidelines recommend two fasting morning tests on separate days before any diagnosis (Mulligan et al., 2006, International Journal of Clinical Practice).

If you're using testosterone without a diagnosis, you're not on TRT. That doesn't automatically mean what you're doing is dangerous in every case, but it does mean you're taking on risks without the monitoring infrastructure that legitimate TRT includes: regular bloodwork, hematocrit checks, PSA monitoring, and cardiovascular assessment. Those aren't bureaucratic formalities. Elevated hematocrit from testosterone use is a documented cardiovascular risk factor (Xu et al., 2013, BMJ). Knowing what category you're actually in affects whether you're getting appropriate oversight.

• TRT is a clinical treatment for diagnosed hypogonadism, not a label for any testosterone use.
• Diagnosis requires two low testosterone readings plus symptoms, not just one test.
• Using testosterone for physique or performance goals is a different category with different risk considerations.
• Anyone using testosterone, regardless of reason, should have regular bloodwork monitoring.

Should you trust this creator's take?

On this specific point, largely yes. The frustration about terminology misuse is medically grounded. Where the video falls short is in presenting the clinical picture as simpler than it is. There's no mention of what actually qualifies as low, no acknowledgment that the therapeutic-versus-cosmetic line has genuine gray zones, and the framing around feeling like you did "at 25" is more bro-science than clinical science. But the fundamental correction, that most people using the term TRT aren't using it accurately, holds up.