Why Every Lifter Should Get Blood Work

Most men don't get blood work until something is visibly wrong — fatigue that won't resolve, unexplained weight gain, or a health scare. This is backwards. Regular blood work is the most powerful diagnostic tool available for identifying subclinical issues that silently impair your training, recovery, hormonal health, and long-term well-being before they become symptoms.

Think of blood work as a dashboard for your body. Just as you'd monitor oil pressure, temperature, and fuel levels in a high-performance engine, blood work reveals the internal state of the machine you're pushing hard in the gym. Deficiencies, hormonal imbalances, organ stress, and metabolic dysfunction can all be detected and corrected through proactive testing.

For men who train seriously, some markers fall outside standard "normal" ranges due to the physiological demands of heavy training. Understanding what's normal for an active man versus the general population helps you and your physician make better decisions.

The Essential Panel for Lifters

Hormonal Markers

Total Testosterone: The headline number for male hormonal health. Standard lab reference ranges are often absurdly broad (264 to 916 ng/dL at most labs), meaning you could be at 280 ng/dL and technically be "normal" while experiencing every symptom of low testosterone. Optimal range for active men: 500 to 900 ng/dL. Below 400 warrants investigation. Below 300 is clinically low.

Free Testosterone: The fraction of testosterone not bound to SHBG or albumin — this is the biologically active testosterone available to your muscles, brain, and other tissues. Total testosterone can be misleadingly normal if SHBG is elevated (which binds testosterone and makes it unavailable). Optimal range: 9 to 25 pg/mL (varies by lab assay). Free testosterone is often a better indicator of androgenic status than total testosterone.

SHBG (Sex Hormone-Binding Globulin): A protein that binds testosterone, rendering it inactive. Elevated SHBG reduces free testosterone even when total testosterone appears normal. SHBG increases with age, low caloric intake, hyperthyroidism, and excessive endurance exercise. Optimal range: 20 to 50 nmol/L. Very high SHBG with normal total testosterone suggests low free (active) testosterone.

Estradiol (E2): The primary estrogen in men, produced by aromatase conversion of testosterone. Optimal range for men: 20 to 35 pg/mL. Below 20 can cause joint pain, low libido, and mood issues (estrogen is important for men too). Above 40 to 50 may cause water retention, gynecomastia, and mood changes.

LH (Luteinizing Hormone) and FSH (Follicle-Stimulating Hormone): These pituitary hormones signal testosterone production and sperm production respectively. If testosterone is low AND LH/FSH are low, the problem is central (pituitary/hypothalamus). If testosterone is low AND LH/FSH are high, the problem is primary (testicular). This distinction determines treatment approach.

Metabolic Markers

Fasting Glucose: Measures blood sugar after an overnight fast. Optimal: 70 to 90 mg/dL. Prediabetic range: 100 to 125 mg/dL. Above 126 is diabetic. Impaired glucose regulation reduces recovery, promotes fat storage, and increases disease risk.

HbA1c (Hemoglobin A1c): A 3-month average of blood sugar levels. More reliable than a single fasting glucose reading. Optimal: below 5.3%. Normal: below 5.7%. Prediabetic: 5.7 to 6.4%. Diabetic: 6.5%+.

Fasting Insulin: Measures insulin levels independent of glucose. Elevated fasting insulin indicates insulin resistance — your body is producing excess insulin to manage blood sugar. Optimal: 3 to 8 μIU/mL. Above 10 suggests developing insulin resistance. This marker often becomes abnormal before glucose does, making it an early warning system.

Lipid Panel: Total cholesterol, LDL, HDL, and triglycerides. Optimal targets for active men: Total cholesterol below 200, LDL below 100 (below 70 if high cardiovascular risk), HDL above 50 (ideally above 60), triglycerides below 100. The ratio of triglycerides to HDL is a particularly useful cardiovascular risk marker — optimal is below 2.0.

Blood Health

Complete Blood Count (CBC):

  • Hemoglobin and hematocrit: Measures red blood cell concentration. Important for men on or considering TRT (testosterone increases red blood cell production). Hematocrit above 50 to 52% warrants attention. Above 54% increases blood viscosity and cardiovascular risk.
  • White blood cell count: Chronically elevated WBC may indicate ongoing infection, inflammation, or overtraining stress. Chronically low WBC may suggest immune suppression.

Ferritin (Iron Stores): Measures your body's iron reserve. Low ferritin causes fatigue, reduced performance, and impaired recovery — even before anemia develops. Optimal for active men: 50 to 150 ng/mL. Below 30 is functionally deficient and requires supplementation. Very high ferritin (above 300) can indicate inflammation, liver disease, or hemochromatosis.

Thyroid Function

TSH (Thyroid-Stimulating Hormone): The primary screening marker for thyroid function. Optimal: 0.5 to 2.5 mIU/L. Standard lab ranges go up to 4.5, but many functional medicine practitioners consider values above 2.5 to be suboptimal. Elevated TSH suggests hypothyroidism, which causes fatigue, weight gain, cold intolerance, and depression.

Free T3 and Free T4: The active thyroid hormones. If TSH is borderline or elevated, free T3 and T4 help clarify whether thyroid function is truly impaired. Free T3 is the most metabolically active thyroid hormone and correlates best with symptoms.

Organ Function and Inflammation

AST and ALT (Liver Enzymes): Markers of liver stress. Heavy resistance training can elevate these markers due to muscle damage (not liver damage) — this is normal and should not be alarming. If levels are markedly elevated (more than 3x the upper reference range) and persistent outside training context, further investigation is warranted.

Creatinine and eGFR (Kidney Function): Creatinine is a byproduct of muscle metabolism. Men with large muscle mass often have creatinine levels above standard reference ranges — this is normal and does not indicate kidney disease. eGFR adjusts creatinine for context. Discuss with your physician if flagged.

hsCRP (High-Sensitivity C-Reactive Protein): A marker of systemic inflammation. Optimal: below 1.0 mg/L. Levels of 1.0 to 3.0 indicate moderate inflammation. Above 3.0 indicates significant inflammation. Chronically elevated hsCRP is associated with cardiovascular disease, impaired recovery, and accelerated aging.

Vitamin D (25-hydroxyvitamin D): Functions as a hormone and correlates with testosterone levels, immune function, bone health, and mood. Optimal: 40 to 60 ng/mL. Below 30 is deficient. Supplement with 3,000 to 5,000 IU daily if below optimal.

How Often to Test

  • Baseline: Get a comprehensive panel when you're feeling well and training consistently. This establishes your personal baseline — far more useful than comparing to population averages.
  • Every 6 to 12 months: Repeat the full panel to track trends over time. Hormone levels, metabolic markers, and inflammation can shift with training phases, stress, aging, and dietary changes.
  • When symptoms arise: Persistent fatigue, unexplained strength loss, mood changes, stubborn fat gain, or changes in libido warrant immediate testing rather than waiting for the next scheduled panel.
  • During TRT or medication use: Every 3 to 6 months for hormone panels, CBC, and liver/kidney function.

How to Get Blood Work

  • Through your physician: Request the specific markers listed above. Some physicians may be unfamiliar with comprehensive panels for active men — advocate for the tests you need.
  • Direct-to-consumer labs: Services like Quest Diagnostics, LabCorp, Marek Health, and InsideTracker allow you to order blood work without a physician order in most states. Results are typically available within 2 to 5 days.
  • Testing preparation: Fast for 10 to 12 hours before the blood draw. Test in the morning (before 10 AM) for the most accurate hormonal readings. Avoid intense training 24 to 48 hours before testing (muscle damage elevates liver enzymes and inflammatory markers).

Key Takeaways

  • Regular blood work (every 6 to 12 months) is the most underused tool in men's fitness. It reveals hormonal deficiencies, metabolic issues, and inflammation before they become symptoms.
  • Key markers: total testosterone, free testosterone, estradiol, fasting glucose, fasting insulin, HbA1c, lipids, CBC, ferritin, thyroid (TSH, free T3/T4), vitamin D, and hsCRP.
  • Optimal ranges for active men differ from standard lab ranges. Total testosterone below 400 warrants investigation, even if the lab says "normal."
  • Active men often have elevated liver enzymes and creatinine due to muscle damage and mass — these are usually normal and not pathological.
  • Test in the morning after a 10 to 12-hour fast and avoid intense training 24 to 48 hours before the blood draw for the most accurate results.