Pre-Camp Bloodwork: The 8-Week Baseline Panel Every Fighter Should Get Before Camp Starts — What to Ask Your Doctor to Run, How to Read the Result, and the Four Values That Change What the First Two Weeks of Camp Look Like

The pattern I see in fight camps that fall apart in week 6 is almost always the same: an athlete who felt fine going in, ramped training load hard through weeks 1 through 4, hit a wall somewhere around week 5, and then started running labs to figure out what was going wrong. By the time the ferritin at 24 comes back, they have three weeks left before fight week, no runway to correct it, and a coach who has to decide whether to reduce training load or accept a compromised athlete on fight night. The panel was diagnostic. It should have been preventive.

The runway to fix most of what shows up on a fight-camp bloodwork panel is 6 to 12 weeks. Iron stores that need to be rebuilt from a ferritin of 25 take 8 to 16 weeks to move meaningfully with oral iron. Vitamin D at 18 ng/mL takes 8 to 12 weeks of daily 4,000 to 5,000 IU dosing to get into the 40 to 60 ng/mL range where fight-camp immune function and bone health hold up. Fasting glucose creeping toward 100 mg/dL is a dietary-pattern question that takes 4 to 8 weeks of intentional macronutrient adjustment. Magnesium repletion takes 6 to 8 weeks on 200 to 400 mg of elemental magnesium per day. Every one of these fixes exists in the 8-week pre-camp window. None of them exist in the 2-week fight-week window.

This is the pre-camp bloodwork panel every serious combat athlete should run 8 weeks before camp starts, why each marker matters for fight-camp physiology, the values that should change what the first two weeks of camp look like when they come back off-reference, and the corrective interventions that actually work in the runway you have before the training load starts stacking up.

When to Draw the Panel

Eight weeks before camp starts is the target window. Twelve weeks is fine — earlier is better because it gives you more runway to correct anything off-reference. Six weeks is workable but tight, particularly for iron correction which needs the full 8 to 16 weeks to move. Four weeks or less and the panel becomes diagnostic rather than preventive, and you are back to making training-load compromises on fight-week timeline.

Draw the panel in a fasted state (10 to 12 hours no food, water is fine) in the morning before you have trained that day. Reschedule if you had a hard training session in the last 48 hours — the acute-training-response effects on CK, ferritin, and a handful of other markers can push a normal panel out of reference and read as a false positive. If you drink alcohol, do not drink for 72 hours before the draw — even moderate drinking distorts liver enzymes and can shift the read on ALT and GGT.

Take the results to a sports-medicine physician or sports dietitian who understands athlete reference ranges. The standard hospital reference range for many of these markers was built off a sedentary adult population and does not represent what “healthy” looks like in a trained combat athlete. A ferritin of 35 is not “normal” for a female wrestler in high-volume camp even though it falls inside the standard reference band. A vitamin D of 28 is not adequate for a fighter cutting weight even though it clears the deficient threshold. The interpretive frame matters.

The Panel Itself — What to Ask For

The panel has three tiers. The first tier is what every fighter should run every camp cycle. The second tier is what you add if the first-tier picture warrants deeper investigation or if you are entering a heavy fight schedule. The third tier is for specific presentations — female-athlete reproductive-cycle disruption, male-athlete testosterone suppression signals, or an athlete over 35 with a family history of cardiac disease.

First-tier panel — every camp, every fighter.

Complete Blood Count (CBC) with differential. Reads hemoglobin, hematocrit, red cell counts, white cell counts and the WBC differential, and platelets. Catches early anemia, infection, and the acute-training-response pattern that shifts the WBC lines.
Comprehensive Metabolic Panel (CMP). Reads liver enzymes (ALT, AST), kidney function (BUN, creatinine, eGFR), fasting glucose, electrolytes (sodium, potassium, chloride, CO2), calcium, and total protein. Catches the fasting-glucose drift, kidney response to protein loads, liver stress from stimulants or supplements, and electrolyte imbalances.
Ferritin. The single most important iron-status marker for combat athletes. Serum iron and TIBC add color but ferritin is the driver.
Vitamin D (25-hydroxyvitamin D). The photosynthesized form the liver converts. Reference-range interpretation is where most athletes get misled.
Magnesium (serum, and RBC magnesium if the lab offers it). Serum magnesium is tightly homeostatically defended and misses depletion; RBC magnesium is more sensitive but not universally available.
hs-CRP (high-sensitivity C-reactive protein). Baseline inflammatory-marker read. Elevated hs-CRP going into camp is a signal.
HbA1c. Three-month glucose average. Complements the fasting glucose from the CMP.
TSH and free T4. Basic thyroid screen. Full thyroid workup only if warranted.

Total cost of the first-tier panel at LabCorp or Quest through a direct-to-consumer service (Ulta Lab Tests, Marek Health, InsideTracker’s basic tier) runs $80 to $180. Through your health insurance with a sports-medicine referral, most of this is covered.

Second-tier — add if warranted or if you are in a heavy competition year.

Free testosterone and total testosterone (male athletes). Baseline is what allows you to catch the training-load-driven testosterone suppression pattern.
DHEA-sulfate. Adrenal-reserve marker.
Cortisol (morning draw). Baseline stress-response marker.
Full lipid panel (LDL, HDL, triglycerides). Cardiovascular baseline, particularly for athletes over 35 or with family history.
Homocysteine and B12. Methylation-pathway marker; catches B12 deficiency and folate insufficiency.
Reticulocyte count. Bone-marrow response to any iron-status concern.

Third-tier — specific presentations.

Female athlete with any menstrual-cycle irregularity: full female-athlete panel (estradiol, FSH, LH, progesterone drawn at appropriate cycle days), plus prolactin.
Athletes over 35 with family history: apolipoprotein B (ApoB), Lp(a), and a coronary-calcium scan discussion with a physician.
Athletes with a prior concussion history entering a camp: baseline cognitive testing beyond bloodwork; not a lab conversation but part of the pre-camp workup.

The Four Values That Should Change What the First Two Weeks of Camp Look Like

Any first-tier panel can come back with one or more markers off-reference in a way that changes what your first two weeks of camp should look like. The four highest-yield ones:

Ferritin Under 40 ng/mL in Male Athletes, Under 50 ng/mL in Female Athletes

The standard lab reference range for ferritin starts at 15 or 20 ng/mL as the lower bound of “normal” — and if you are a sedentary office worker, that lower bound is roughly correct. For a combat athlete going into a high-volume training block, it is not. The sports-hematology literature has consistently shown functional performance deficits (VO2 max reductions, time-to-exhaustion drops, subjective fatigue) at ferritin levels below 30 to 40 ng/mL in male athletes and 40 to 50 ng/mL in female athletes, even in the absence of frank iron-deficiency anemia. The athlete’s hemoglobin can be entirely normal and the ferritin at 25 will still produce the presentation of a fighter who cannot recover between sessions, whose resting heart rate drifts up across weeks 3 through 5, and whose grip endurance fades in the third round of live rolls.

The correction is oral iron supplementation dosed 45 to 65 mg of elemental iron every other day, taken on an empty stomach with 500 mg of vitamin C to enhance absorption. The every-other-day dosing is not a mistake — the hepcidin response to daily iron dosing actually blocks absorption on subsequent doses, and alternating days improves total absorbed iron over the week. Ferritin will move roughly 10 to 20 ng/mL per month on this protocol; you need the 8-week runway to move from 25 to 50. Recheck ferritin in week 4 of camp to confirm the trajectory.

If oral iron is not moving the needle after 4 weeks or if the deficit is severe (ferritin under 15), the referral is to a sports-medicine physician who can evaluate an IV iron infusion. An IV iron protocol can move ferritin from 15 to 100 in a single infusion and is the intervention that makes the difference for athletes whose GI tract does not tolerate oral iron. The IV pathway is a medical decision, not a self-treated one, and it requires a physician evaluation to rule out an underlying GI bleed or malabsorption pattern driving the deficit.

The training-load change if ferritin comes back low: reduce total weekly training stress by 15 to 25 percent in the first four weeks of camp, prioritize technical over conditioning work, and reassess in week 4 with the follow-up draw. Pushing a low-ferritin athlete through a full training load is how you get the fifth-week crash.

Vitamin D Under 40 ng/mL

The standard reference range for 25-hydroxyvitamin D flags below 20 or 30 ng/mL as deficient depending on the lab. That threshold was set for skeletal-only outcomes in the general adult population. For combat athletes, the sports-medicine literature has increasingly converged on a functional target of 40 to 60 ng/mL for immune function, bone health under repetitive impact, muscle strength maintenance, and infection resistance across a camp cycle. Anything under 40 ng/mL is a signal to correct, not a signal that everything is fine.

The correction is 4,000 to 5,000 IU of vitamin D3 daily, taken with a fat-containing meal (D3 is fat-soluble; a fasted dose absorbs poorly). Pairing D3 with K2 (100 to 200 mcg of MK-7 form) is the standard pattern in the sports-supplementation literature because K2 directs the calcium that D3 mobilizes into bone rather than into vascular calcification — the two vitamins work as a co-factored pair. Recheck the 25-OH vitamin D level at week 6 to 8 of the intervention to confirm you have landed in the 40 to 60 ng/mL range.

The training-load change if vitamin D comes back low: nothing acute, but the athlete going into camp with a D of 18 is at elevated risk of upper respiratory tract infections through the training block. Any cold-symptom onset in weeks 3 through 6 is going to hit them harder and last longer than the same infection in a D-replete athlete. Reduce exposure to sick training partners aggressively, prioritize sleep hygiene, and monitor for the early-cold symptoms so you can back off training load at the first sign rather than pushing through and getting knocked out for a week.

Magnesium at the Low End of Reference (Serum Under 2.0 mg/dL, or RBC Magnesium Under 5.0 mg/dL)

Serum magnesium is tightly homeostatically defended — the body will pull magnesium out of bone stores to keep serum levels in range long after tissue depletion has developed. A serum magnesium at 1.9 mg/dL is not “borderline”; it is a signal that tissue stores are already meaningfully depleted. RBC magnesium is a more sensitive marker but is not universally available; if your lab offers it, run it.

The correction is 200 to 400 mg of elemental magnesium per day, ideally as magnesium bisglycinate or magnesium malate for the best absorption-plus-tolerance profile. Magnesium oxide (the cheapest and most common OTC form) has poor bioavailability and produces GI symptoms at doses that actually move tissue levels. Dosed in the evening, magnesium also supports sleep quality — a secondary benefit for camp physiology.

The training-load change if magnesium comes back low: the presentation of magnesium depletion in combat athletes includes cramping (particularly in the calves and hamstrings during hard training), disrupted sleep quality, elevated resting heart rate, and blunted power output. The correction is nutritional (dark leafy greens, nuts, seeds, whole grains, beans, dark chocolate) plus supplemental. If cramping has been a chronic camp issue, magnesium is the first thing to check.

Fasting Glucose 95 to 100 mg/dL, or HbA1c Over 5.4

Neither of these values crosses the diabetes threshold (fasting glucose 126, HbA1c 6.5). Both are in the “high-normal” band that most primary care physicians will read as fine. For a combat athlete going into a training block that will require metabolic flexibility — the ability to fuel hard glycolytic work in training while also using fat effectively in longer aerobic sessions and during weight-cut restriction — a fasting glucose creeping toward 100 and an A1c above 5.4 is a signal that carbohydrate handling is not where it needs to be. The presentation in camp is stalled weight loss during the cut, hunger and irritability spikes between meals, and a subjective “flat” quality to metabolic conditioning sessions.

The correction is dietary-pattern change through the 8-week runway. Reduce refined carbohydrates and added sugars aggressively (soda, sports drinks outside of training windows, sweetened coffees, refined-grain breakfast foods). Structure meals around protein plus vegetables plus modest whole-food carbohydrate portions timed around training. Add resistance training if it is not already in the program — muscle mass improves insulin sensitivity independent of any dietary change. Recheck fasting glucose and HbA1c at 6 to 8 weeks; the fasting glucose will move faster than the A1c because A1c is a 3-month average.

The training-load change if fasting glucose or A1c comes back high-normal: no immediate reduction, but plan for the metabolic-conditioning sessions to feel harder than expected in the first two weeks. As insulin sensitivity improves through the dietary intervention across weeks 3 through 6, the conditioning will normalize. Push through the early-camp discomfort rather than adding carbohydrate to make sessions feel better — the discomfort is the intervention.

Follow-Up Cadence Across Camp

The pre-camp panel is the baseline. The camp itself is when you actually need to check whether the interventions are landing. My standard cadence:

Week 4 of camp: targeted redraw. Redraw only the markers that came back off-reference in the baseline panel, plus CBC and CMP to catch anything new that has developed under training load. Costs $40 to $80 depending on how many markers are on the redraw. This is the intervention-response check.

Week 8 of camp (typically 2 to 4 weeks before fight): full second-tier redraw. Everything from the baseline panel, plus the second-tier markers (testosterone, DHEA-S, cortisol) to catch any overtraining-signal pattern before fight week. This is the “are we going to make weight and be recovered” check.

Fight week: no bloodwork. Weight-cut physiology distorts almost every marker on the panel — pushing a draw in fight week produces uninterpretable results. If you have made it to fight week without a signal, do not draw. If you have a red-flag symptom in fight week (fever, chest pain, unexplained bleeding), that is a medical evaluation, not a routine bloodwork question.

Two weeks post-fight: recovery check. Optional but recommended for fighters cycling into another camp within 12 weeks. The post-fight bloodwork reads where camp-plus-cut left you and drives the interventions for the next camp cycle.

What Not to Do With the Panel

Do not treat the panel like a scoreboard. A ferritin of 45 is not “better than” a ferritin of 40 in any competitive sense. The question is functional adequacy for the training load, not maximization of every number.

Do not add supplements based on marketing rather than on the panel. Athletes who see the pre-camp panel come back mostly clean and then decide to add five supplements “just in case” are running the risk of interacting doses, triggering GI issues in camp, and masking whatever the actual signal from the next panel is. Correct what the panel says needs correcting. Leave the rest alone.

Do not run the panel and then not talk to a sports-medicine physician or sports dietitian about the result. The interpretive frame matters and the intervention decisions depend on it. If your primary care doctor reads the ferritin at 28 as “normal” and does not want to intervene, get a second opinion from a sports-medicine physician who works with athletes routinely. The reference-range problem is real and the general-medicine reading of an athlete’s panel is frequently wrong for the athlete population.

Do not skip the panel because you feel fine. The presentations that show up in week 5 of camp were, in most cases, already visible on a baseline panel drawn 8 weeks earlier. “Feeling fine” is not a diagnostic instrument.

The Cost-Benefit Argument

The panel costs $80 to $180 direct-to-consumer, or a co-pay through insurance. The alternative — running camp on baseline unknowns, catching a problem in week 5, and either compromising the fight or missing weight — costs a purse. The ratio is not close. Every fighter serious enough to be reading this post is serious enough to run the panel.

The other alignment worth naming: your coach and your training partners are watching you across camp. If they see the weeks 3 to 5 drop-off, the running-heart-rate drift, or the flat sparring rounds, they will attribute it to a bunch of possible causes and pick one. Being able to walk into the coach’s office with the panel and say “my ferritin was 25, we are on iron replacement, load down for the next four weeks, recheck at week 4” is the conversation that gets you the training-load flexibility to actually correct the problem. Without the panel, that conversation is “I just feel tired,” and the coaching decision will land somewhere different.

Draw the panel eight weeks out. Read the results with someone who understands athlete reference ranges. Fix what needs fixing before you start piling on the training load. Recheck at week 4 to confirm the interventions are landing. That is the pre-camp bloodwork protocol, and it is the difference between a camp that ends on schedule and one that falls apart in week 6.