TRT journey claims: what 102 weeks of testosterone therapy actually looks like

What did @bigpuncustoms actually say?

This is a personal progress update, not a medical tutorial. The creator documents week 102 of TRT, reporting a weight of 276.6 pounds, roughly 25 miles of recumbent bike cardio that week, and a new experiment with carnivore dieting. The most specific claim worth examining: after starting carnivore, his bike mileage dropped from around 8.5 miles per 30-minute session to 8.13 miles. He attributes this drop directly to the diet change, saying "no weights and all I did was 8.13. I went from 8.5 miles to 8.13, just off of carnivore difference." He also mentions working toward a 40-inch waist and notes his legs are "really massive." He frames TRT as something that "definitely changed my life in a positive" and invites viewers to ask questions about starting their own TRT journey.

Does the science back this up?

The carnivore-to-performance drop claim is directionally plausible, though one data point from one session is nowhere near enough to establish causation. That said, the physiology here is real. Transitioning to a zero-carbohydrate diet typically impairs high-intensity aerobic output in the short term.

Research consistently shows that low-carbohydrate diets reduce glycogen availability, which matters for sustained moderate-to-high intensity cardio. Burke et al. (2017, Journal of Physiology) found that elite race walkers on a ketogenic diet had measurably worse performance outcomes despite higher fat oxidation rates. The adaptation period, sometimes called "keto flu," can last two to four weeks and includes fatigue, reduced power output, and elevated perceived exertion. A 0.37-mile drop per session in week one of carnivore is consistent with early glycogen depletion. Whether it persists depends on adaptation. The creator does not claim TRT caused the performance drop, which is correct. TRT does not directly impair aerobic output and in men with confirmed hypogonadism may improve it (Storer et al., 2012, Journal of Clinical Endocrinology and Metabolism).

What did they get wrong (or right)?

The creator deserves credit for not overclaiming. He does not say carnivore is superior for TRT users, does not attribute muscle gains exclusively to testosterone, and is upfront that his physique at filming is different from what it was during the week he is describing. That intellectual honesty is refreshing on a platform full of "TRT transformed me in 8 weeks" content.

What is weaker: attributing a single session's mileage drop entirely to carnivore is a stretch. He had already noted that week involved more filming, disrupted sleep, and no sauna access. Any of those factors could explain a modest cardio dip. Sleep deprivation alone measurably reduces aerobic performance (Skein et al., 2011, Medicine and Science in Sports and Exercise). He is also inviting followers to ask TRT questions and framing himself as a resource, which is fine for anecdotal sharing but carries real risk if viewers treat it as clinical guidance. TRT requires lab work, a prescribing physician, and monitoring. Bodyweight trends and bike miles do not substitute for that.

What should you actually know?

If you are on TRT and considering carnivore, expect a performance dip in the first two to four weeks. That is not the diet failing you, that is your body running low on stored carbohydrate while building fat-oxidation machinery. Whether performance recovers depends on your intensity level and how fat-adapted you become.

More importantly, TRT is a medical treatment for hypogonadism, not a fitness supplement. The FDA-approved indications require documented low testosterone confirmed by at least two fasting morning labs. Side effects including erythrocytosis, suppression of natural testosterone production, and cardiovascular risk require ongoing monitoring. A TikTok journey log, even a 102-week one, is not a clinical roadmap. Positive personal outcomes are real and worth sharing, but they do not generalize. What worked for someone at his body composition, age, and baseline hormone levels may not apply to you. If you are "looking at it," as he puts it, talk to a licensed clinician before anything else.

• Carnivore diets cause predictable short-term drops in aerobic output due to glycogen depletion.
• TRT for documented hypogonadism can improve body composition and energy, but requires medical supervision.
• Anecdotal n=1 data from social media is not a substitute for lab-confirmed diagnosis and clinical monitoring.