Think of this quiz as a friendly coach with a clipboard. It asks about your body, your running, your goal, and your life — then builds a running plan that fits you, not some random stranger. Here's what each part is really measuring, in plain words, and why scientists say it works.
🐢🐇1. The Tortoise & the Hare — your natural "gears"
Your muscles are packed with two kinds of tiny engines. Slow engines (the tortoise) can go almost forever without getting tired, but they aren't very fast. Fast engines (the hare) can go super-fast, but they burn through their fuel quickly. Everybody has a mix of both — but some people are born with more tortoise, and some with more hare.
How do we know this is real? Scientists took tiny samples of muscle from real runners and looked at them under a microscope. Long-distance runners had mostly slow ("tortoise") engines — around 60–70% — while sprinters had mostly fast ("hare") ones.[2] The quiz's questions and tests estimate your mix.
Why it works: your engine mix is partly built into you, so a plan that matches it — more easy miles for a tortoise, more speed-and-recovery care for a hare — feels better and gets better results than a one-size-fits-all plan.
💨2. The 200 m sprint — checking your top speed
We ask you to run 200 metres as fast as you can. This is like glancing at the very top number on a car's speedometer: it shows how much "hare" horsepower you're carrying. A fast 200 m means lots of speedy fast-twitch engines.
🏃3. The time trial — checking your cruising range
Next we look at a longer effort (a mile, 3 miles, or a 5K). That shows your "tortoise" side: how long you can hold a strong, steady pace. It's the size of your fuel tank and how smoothly your engine runs on it.
🔑4. Speed Reserve Ratio — the clever trick
Here's the neat part. We take your sprint speed and divide it by your cruising speed. If your sprint is WAY faster than your cruise, you're speed-built (a hare). If they're close together, you're endurance-built (a tortoise). Real sport scientists use this exact number — they call it the Speed Reserve Ratio — to sort even Olympic-level runners into speed, endurance, and in-between types.[4]
Why it works: two runners can cruise at the same speed but still need totally different training. This one ratio catches that hidden difference, so nobody gets handed the wrong kind of workouts.
❤️5. Heart-rate zones — training at the right effort
If you tell us your resting heartbeat and your highest heartbeat, we can work out your personal "effort zones." We use a formula invented by a Finnish scientist named Karvonen back in 1957.[3] It's smarter than just "a percentage of your maximum," because it also accounts for how fit your heart already is.
Why it works: it keeps your easy days genuinely easy and your hard days genuinely hard — which, it turns out, is the secret sauce of good endurance training.
⛰️6. The Lydiard plan — build a big base first
The plan is built on the ideas of Arthur Lydiard, a legendary coach who turned ordinary people into Olympic champions. His big idea: before doing lots of hard, fast running, spend weeks building an aerobic base — piles of comfortable, easy running.[1] Modern science backs him up: the best endurance athletes in the world do roughly 80% easy running and only 20% hard — the "80/20 rule."[5]
Why it works: easy miles quietly upgrade your engine — more tiny blood vessels, a stronger heart pump, and more "power plants" (mitochondria) inside your muscles — with very little injury risk. Then the hard 20% sharpens everything on top of that big base.
🛡️7. Going up slowly + the health check — staying safe
We ask about past injuries, sleep, stress, and health so the plan never piles on too much, too soon. Here's a surprise: training hard actually protects you from injury — but only when you build up gradually. It's the sudden jumps in mileage that hurt people, not hard work itself.[6] The health questions aren't there to judge you; they just raise a little flag to check with a doctor if something needs a look.
Why it works: a body that's been prepared step-by-step becomes tougher and more resilient; a body that's shocked with a big jump breaks down.
🎯8. Turning your tests into real paces
Finally, the plan turns your test results into actual running paces for each type of workout, using performance tables built by exercise scientist Jack Daniels.[7] That's how one 5K time can tell us how fast your easy runs, tempo runs, and intervals should be.
Why it works — the big picture: people respond to the exact same training very differently — some improve a lot, some barely at all. So a generic plan wastes effort. By reading your gears, your fitness, your goal, and your real life, this quiz shapes a plan that fits the actual you.
References
- Lydiard, A., & Gilmour, G. (2000). Running with Lydiard (2nd ed.). Meyer & Meyer Sport. — origin of the aerobic-base and periodized-training method.
- Costill, D. L., Daniels, J., Evans, W., Fink, W., Krahenbuhl, G., & Saltin, B. (1976). Skeletal muscle enzymes and fiber composition in male and female track athletes. Journal of Applied Physiology, 40(2), 149–154. doi:10.1152/jappl.1976.40.2.149
- Karvonen, M. J., Kentala, E., & Mustala, O. (1957). The effects of training on heart rate: a longitudinal study. Annales Medicinae Experimentalis et Biologiae Fenniae, 35(3), 307–315. PMID 13470504
- Sandford, G. N., Allen, S. V., Kilding, A. E., Ross, A., & Laursen, P. B. (2019). Anaerobic Speed Reserve: A Key Component of Elite Male 800-m Running. International Journal of Sports Physiology and Performance, 14(4), 501–508. doi:10.1123/ijspp.2018-0163
- Seiler, S. (2010). What is best practice for training intensity and duration distribution in endurance athletes? International Journal of Sports Physiology and Performance, 5(3), 276–291. doi:10.1123/ijspp.5.3.276
- Gabbett, T. J. (2016). The training–injury prevention paradox: should athletes be training smarter and harder? British Journal of Sports Medicine, 50(5), 273–280. doi:10.1136/bjsports-2015-095788
- Daniels, J. (2013). Daniels' Running Formula (3rd ed.). Human Kinetics. — VDOT performance tables that convert a race result into training paces.
This explanation is for education, not medical advice. If a health flag comes up, check with a qualified professional before ramping up training.
