Know Your
True Limits

Why Ultimate Is Different

Same Laboratory. A Far Deeper Look.

Every assessment here is a cardiopulmonary exercise test. What changes as you move up the tiers is how much of that physiology we set out to capture — and how much of it ends up in your hands.

Tiers I to III answer performance questions: how much oxygen you can use, where your thresholds sit, how you produce force, and how you should train. Ultimate runs a longer protocol with extended submaximal stages, adds resting and exercise 12-lead ECG, spirometry and exercise blood pressure, and reports the complete ventilatory and substrate picture alongside it.

That means LT1 and LT2 stop being two isolated points on a curve. Your lactate response is read against your ventilatory behaviour, your gas exchange, your RER and your heart rate — and we can identify precisely where your body shifts from burning fat to burning carbohydrate. Independent measurement streams, triangulated into a single picture of how you produce energy.

Rua Laboratories provides exercise physiology and performance monitoring. Resting and exercise 12-lead ECG is recorded as part of performance assessment — this is not a diagnostic cardiac screening service and does not constitute medical clearance to exercise. Anyone with a known or suspected cardiac condition should consult their doctor before testing.