A 38-year-old infantry officer at Fort Benning came in last fall convinced he had low testosterone. He was lifting four days a week, running sub-21-minute 5Ks, eating clean, sleeping seven hours, and still feeling like his recovery had collapsed in the past two years. Workouts that used to leave him sharp now left him flat for two days. Morning erections had become inconsistent. His libido was lower than it had been at any point in his adult life. He had pulled his own labs at a discount lab — total testosterone 412 ng/dL. His primary care doctor had told him that was normal and refused to look further. "Normal" was the word that kept coming up, and it was driving him toward a black-market source he had read about on a forum.
His total testosterone was technically inside the reference range. His free testosterone, when I ran the full panel, was 6.8 pg/mL — below the bottom of the optimal window for a man his age. His SHBG was elevated at 52, sequestering most of his total. His estradiol was 18 pg/mL. His LH was on the low end of normal, suggesting his hypothalamus was not driving his testes hard. His morning cortisol was elevated. His ferritin was 38, low for an active male. None of that showed up on the screening labs his PCP had ordered.
This is the pattern that brings athletic men through my door, and it is the reason a different framework is needed when I evaluate them.
Why athletic and active men are evaluated poorly by default
The standard outpatient testosterone workup was not built for this population. Most reference ranges for total testosterone span roughly 264 to 916 ng/dL — a window so wide that a 35-year-old elite-trained athlete with a level of 350 is told he is "normal," even though his physiology is functioning well below where it should be for his training load and metabolic demand.
Several factors compound the problem in active men:
SHBG is often elevated. Sex hormone binding globulin tends to run higher in lean, well-trained men, particularly those with low body fat and high training volume. Elevated SHBG sequesters testosterone in a bound, biologically inactive form. Total testosterone can look reasonable while free testosterone — the fraction that actually reaches receptors — is meaningfully low. Most primary care orders never include free testosterone or SHBG.
Training stress masks deficiency symptoms initially. A man training hard with adequate baseline testosterone will compensate for early hormonal decline through pure willpower and training adaptation. Symptoms emerge later than in sedentary men, and when they do, they often present as performance plateau, recovery failure, or unexplained mood change rather than the classic fatigue picture.
Caloric and energy availability matter. RED-S (relative energy deficiency in sport) is increasingly recognized in male athletes as well as female. Chronic energy deficit suppresses the hypothalamic-pituitary-gonadal axis. A man training hard and under-fueling can drop his own testosterone production substantially, and the picture looks like primary deficiency on labs.
Stress load is non-trivial. Active duty military, first responders, shift workers, men in physically demanding jobs in middle Georgia — Fort Benning, Columbus, Warner Robins, Robins Air Force Base — carry chronic cortisol elevation that suppresses gonadal function. The hormonal picture is rarely just one thing.
In my time in emergency medicine and the cardiac ICU before I moved to outpatient hormone work, I saw plenty of healthy-looking, fit men in their 40s come in for events that should not have happened. The metabolic and hormonal pictures we never bothered to assess in those patients were almost always doing something. That informs how I approach the active male population now: a man's appearance and his bench press number do not tell me what his physiology is doing.
The mechanism of the deficiency picture in this group
Testosterone production is regulated by the hypothalamic-pituitary-gonadal axis. The hypothalamus releases GnRH in pulses, which prompts the pituitary to release LH and FSH, which signal the testes to produce testosterone and sperm. That signal can be disrupted at any level.
In athletic men I see three dominant patterns:
Secondary suppression from training and energy load. LH is low or low-normal, FSH similar, total testosterone low-normal, SHBG elevated. The testes are capable; they are not getting the signal. This is not classical primary hypogonadism. The patient often improves significantly with energy availability correction, sleep restoration, and stress modulation before any exogenous testosterone is considered.
Subclinical primary failure. LH and FSH elevated, testosterone low. The signal is being sent; the testes are not responding adequately. This is more common with age, prior steroid exposure, varicocele, or environmental factors. This pattern is what most directly responds to men's testosterone replacement.
Mixed picture with high SHBG and elevated estradiol. Total testosterone may look fine, but free testosterone is suppressed, and the elevated estradiol is contributing to symptoms. This pattern often improves significantly with attention to body composition and adjunct considerations rather than aggressive testosterone dosing.
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The dosing strategy depends entirely on which pattern is driving the picture. Treating the second pattern with testosterone usually works. Treating the first pattern with testosterone without addressing the underlying energy and recovery deficit shuts down the patient's own production further and tends to leave him dependent on exogenous hormone for what was actually a recoverable physiological state.
What I look for in an active male's workup
The panel I run on an athletic man asking about testosterone is broader than the standard:
- Total testosterone, free testosterone (calculated and direct when available), SHBG, albumin
- Estradiol (sensitive assay — the standard immunoassay is unreliable in men)
- LH and FSH
- Prolactin
- DHEA-S
- Full thyroid (TSH, free T3, free T4, reverse T3, antibodies)
- AM cortisol; four-point salivary if pattern dysregulation is suspected
- Comprehensive metabolic panel, lipid panel, fasting insulin, HbA1c
- CBC with differential
- Ferritin and full iron studies
- Vitamin D
- PSA baseline (always, before any TRT)
- Hematocrit baseline (always — TRT can drive it up)
The findings often steer the conversation away from immediate testosterone replacement. If LH is suppressed and the patient is running a 600-calorie deficit during a training block, the answer is to fix the deficit and reassess. If ferritin is 28 in a man running 40 miles a week, the answer is iron repletion before anything else. If thyroid is borderline and reverse T3 is elevated, that gets addressed.
The patient who actually needs and benefits from testosterone replacement is the one whose physiology will not recover with foundational corrections — and that is a clinical judgment based on the full picture, not a single number on a single lab.
How dosing differs in the active male population
When TRT is appropriate, the dosing strategy in this group tends to differ from the conservative-elderly-patient template most clinics default to.
The starting dose I use for an active 35-year-old is generally on the lower side of the therapeutic range — often 80 to 100 mg of testosterone cypionate per week, split into twice-weekly subcutaneous injections rather than the once-weekly intramuscular dose still used in many clinics. Twice-weekly dosing produces a flatter pharmacokinetic curve and reduces the estradiol spike that drives many side effects.
Targets are different too. For a sedentary 65-year-old, a total testosterone of 600 may be fully adequate. For a 35-year-old training hard, the target is usually higher within the physiologic range — 700 to 900 — because the receptor demand and the SHBG dynamics call for a higher delivered dose to achieve the same free testosterone effect.
Adjuncts matter. HCG to maintain testicular function is usually appropriate for younger men who want to preserve fertility. An aromatase inhibitor is occasionally needed but is over-prescribed in this space — most well-managed TRT patients do not need one if dosing is conservative and timing is split. The patient's hematocrit is followed closely, because erythrocytosis is the most common metabolic side effect and matters more in men with cardiovascular risk factors.
Performance-driven supraphysiologic dosing — the doses that show up in bodybuilding and recreational use — is not what we do. Those doses produce predictable cardiovascular, hematologic, and metabolic consequences that I dealt with in the ICU more often than people realize. Our protocol restores physiology. It does not push past it.
Where this fits with the rest of the picture
For active men, men's testosterone replacement is one element of a larger optimization picture. Body composition matters — visceral fat raises aromatase activity and converts testosterone to estradiol, so a medical weight loss component may be relevant for the man whose body composition has shifted. Sleep matters — testosterone production happens during deep sleep, and an athletic man with untreated sleep apnea will not respond optimally to TRT until the sleep architecture is addressed. Recovery and training programming matter — chronic overreaching suppresses the same axis we are trying to support.
The patients in this group who do best are the ones who treat hormone optimization as part of an integrated performance and longevity plan, not as a standalone fix.
A concrete next step
If you are an active or athletic man with symptoms that conventional labs have brushed off, the next step is a complete workup with the full panel, not the screening panel. Pull whatever recent labs you have, including any from a discount lab service, and bring them. Pull your training log and a one-week food log if you have them. Mention at the consultation booking that you are an active male presenting for testosterone evaluation so the front desk allocates an extended intake. The first conversation is usually the one that gets you to a real answer about whether your physiology actually needs replacement, or whether the picture in front of us is recoverable without it.
Medical disclaimer: This article is for educational purposes only and does not constitute medical advice. Individual clinical decisions should be made in consultation with a qualified healthcare provider following appropriate evaluation. References to specific treatments, dosing, or protocols are informational.
Travis spent 17+ years in high-acuity clinical medicine — emergency, cardiac ICU, and cath lab — before founding Revitalize. He is a Certified Platinum Biote hormone therapy provider, the published author of You're Not Broken — You're Unbalanced, and the founder of the Rebuild Metabolic Health Institute. His clinical writing reflects the same precision he brought to critical care: specific, honest, and built around what actually works.
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