The Endurance Blueprint
Four arms, and three of them are legal in competition
Everything on this page is free. The stack, why each pick beat its alternatives, every option, the bloodwork and the safety lines. The week-by-week schedule and the decision rules are the members half.
Endurance fails in four different places and they feel almost identical from the inside. Your mitochondria are too few or too inefficient — that is the biogenesis arm, and it is the one training itself works on. Oxygen is not arriving — delivery, which is haemoglobin, iron and nitric oxide, and it is the arm most often fixed by a blood test rather than a supplement. Acid and fatigue metabolites accumulate faster than you clear them — buffering, which is where the highest-certainty supplements in all of sports science live. You run out of fuel — substrate. The honest ranking is unusual on this page: the buffering arm has better evidence than anything else in the Vault outside the cardiovascular page. Creatine, beta-alanine, caffeine, bicarbonate and nitrate are the five compounds sports science actually agrees on.
Can you run all of them? Yes - and here is what it costs
This is a general protocol. You make the final call on how much of it to run — or have it built around your labs.
Which of these 4 is actually you?
This tells you where your biggest leverage is — where to start, not where to stop. Read the But line too: it is what each lane cannot do for you, which is the part a list of options never tells you.
Before any of it — the foundation
These four are not a disclaimer at the bottom of the page. They are the reason the rest of it works, and every one of them is free.
Growth hormone is released in pulses during deep sleep, insulin sensitivity is measurably worse after one bad night, and appetite regulation collapses without it. Every compound below works through a system that sleep already governs. This is not filler advice — it is the highest-leverage item on the page and it is free.
The single dietary variable with the most consistent evidence behind it for body composition, in both directions — building and preserving. Under-eating protein while running anything anabolic is paying for a signal with no substrate to act on.
Nothing here substitutes for mechanical tension. Compounds change how well you recover from and adapt to training; they do not replace the stimulus. A protocol run without training reliably produces the side effects and not the results.
Non-exercise activity is the largest and most variable component of daily energy expenditure, and it is the one that quietly falls when you start dieting. Tracking it stops the metabolic adaptation people blame on their thyroid.
The stack
This page splits cleanly in two and it is worth saying which half you are in. Creatine, caffeine, beta-alanine, bicarbonate, beetroot and iron repletion are supported by dozens of trials and meta-analyses each. Urolithin A has human RCTs on muscle endurance specifically. The exercise mimetics — SLU-PP-332, AICAR, MOTS-c, SS-31, ITPP — argue for a real and interesting mechanism from a very thin human base, and several are explicitly banned in sport. Both halves are on this page because both are options. Which half you are in should be a decision, not an accident.
Each pick names what it was chosen over and why. That is the difference between a blueprint and a list — if you disagree with a choice, the alternative is right there and swapping it does not break the rest.
Health supplements & substrate
The floor underneath the compounds. Cheap, well tolerated, and the part that decides whether anything above it has a fair chance — a secretagogue on a magnesium deficiency is a rounding error.
Exercise mimetics & mitochondrial biogenesisUrolithin A7 options
7 options — 0 to swap in, 7 to stack ontap to collapse
Oxygen delivery & nitric oxideBeetroot (Nitrates)6 options
6 options — 0 to swap in, 6 to stack ontap to collapse
Buffering & fatigue resistanceBeta-Alanine5 options
5 options — 0 to swap in, 5 to stack ontap to collapse
Substrate & fuel availabilityL-Carnitine L-Tartrate6 options
6 options — 0 to swap in, 6 to stack ontap to collapse
The 12-week schedule
What goes in, what comes out, and when. The exact doses for each phase are inside the Academy — the structure below is free because it is the part you need to decide whether this fits your life.
| 0 | 1–4 | 5–8 | 9–12 | Ongoing | |
|---|---|---|---|---|---|
| Urolithin A | |||||
| L-Carnitine L-Tartrate | |||||
| Beta-Alanine | |||||
| Creatine | |||||
| Beetroot (Nitrates) |
Each bar is a week block that compound is running. The shape is free — it is what tells you whether this fits your life. The doses for each phase are the members half.
Full iron panel with ferritin, plus a CBC.
Ferritin below 30 is the commonest fixable cause of unexplained endurance failure, and it is invisible on a CBC until it is severe enough to lower haemoglobin. Endurance athletes lose iron through foot-strike haemolysis, sweat and gut losses — the prevalence in distance runners is high and the correction is dramatic.
Beta-alanine and creatine both need weeks to saturate.
Neither of these works acutely — they are loading protocols, and starting them the week of an event is wasted money. Split beta-alanine doses or expect the paraesthesia, which is harmless and alarming.
Nothing new. Beta-alanine and creatine both need weeks to saturate and both started in week 1, which is the only place they fit in a 12-week block.
Do not use antibacterial mouthwash on beetroot. The oral bacteria performing the first reduction step are part of the mechanism, and mouthwash abolishes the blood pressure and performance effect entirely. This is the detail that most often makes it fail.
Every acute dose gets rehearsed. Nothing new on race day.
Bicarbonate and caffeine both have individual timing and tolerance windows, and both have ruined races when tried for the first time under pressure. Two training rehearsals minimum.
Buffering and delivery are chronic. The rest is situational.
Creatine and beta-alanine stay loaded. Beetroot works chronically or acutely. The mimetics arm is the one to be honest about — if twelve weeks of it produced nothing measurable on your own splits, the mechanism being interesting is not a reason to keep paying.
The doses for each phase are inside
Every compound above, dosed week by week, plus the reconstitution numbers and Coach Cam's notes on running it. $10/mo.
Unlock the schedule →Bloodwork
Ferritin is the marker on this page. A CBC can be entirely normal with iron stores at rock bottom, because the body protects haemoglobin last — by the time haemoglobin falls you have been symptomatic for months. Endurance performance appears to degrade below roughly 30–40 ng/mL even with normal haemoglobin. TSH with free T3 matters because low T3 is the classic signature of under-fuelling in endurance athletes — a normal TSH with a low free T3 is energy deficiency, not thyroid disease, and no supplement fixes it. Testosterone is here for the same reason. Chronic high-volume endurance training suppresses it, in both sexes, and it is one of the earliest signals that volume has outrun recovery.
Before you start
Everything, drawn before you start. This is the one that decides which pathway is actually yours - and the only one you cannot go back and collect later.
Around week 8
The short list, drawn while you are running it. Not a progress report - it is the draw that catches the things that go wrong quietly.
After
Drawn at the end, against your own baseline. This is what turns the protocol into information rather than a feeling.
All three are drawn at Quest, 2,000+ US locations, no doctor visit, HSA/FSA eligible. Prefer to pick and choose? Every marker above links to its own page, and the panel builder assembles any combination.
Adjusting it
A protocol you cannot adjust is a protocol you abandon. Four situations come up on nearly every run of this — nausea that will not settle, a three-week stall, hair shedding, glucose moving the wrong way. Each one has a specific answer, and the wrong answer to a stall is the reason most people end up on six compounds that each do nothing.
The four decision rules are inside
What to change, what to leave alone, and how to tell a real stall from a water shift. $10/mo.
Unlock the decision rules →The lines I'd stop at
- Chest pain, unusual breathlessness or palpitations during exertion. That is a cardiac assessment, not a training question.
- Dark or cola-coloured urine after hard training — rhabdomyolysis, and it needs same-day attention.
- Confusion, nausea or headache during a long event with lots of fluid intake. That is hyponatraemia and drinking more water makes it worse.
- Any iron supplement continued without a repeat ferritin. Overload is silent, cumulative and does real organ damage.
- Resting heart rate elevated 10+ beats for a week alongside falling performance and disturbed sleep. Stop adding; deload.
It is built for the common case, not for you specifically. Compound selection and dosing genuinely do change person to person — training age, bloodwork, what you have run before, what you react to. Adjust it against your own numbers using the panels above, or if you want it built around your labs rather than the average, that is what 1-on-1 coaching is for.