Medical-grade testing · Winchester, UK

Optimise human
performance.

Stop guessing what your body needs. Clinical metabolic tests reveal exactly how you burn fuel, recover and perform, so every decision is backed by your own data.

What you'll discover

  • RMRTrue calorie burnResting Metabolic Rate
  • VO₂Cardio capacityAerobic peak & zones
  • FAT%Fat vs carb burnMetabolic flexibility
  • HRZYour heart rate zonesPersonalised, not estimated
  • An actionable reportExercise, nutrition & lifestyle
Download on theApp StoreGet it onGoogle PlayPlus our free app, on iPhone and Android

Our tests

Two tests. Total clarity.

Take a single test, or the September Package: both tests in one session and an 8-week training programme built from your results.

30 min

Resting Metabolic Rate

Understand exactly how many calories your body burns at rest, and what that means for your weight, energy and long-term health.

  • True caloric needs for any goal
  • Metabolic dysfunction risk score
  • Fat burning efficiency at rest
  • Heart rate variability (HRV)
  • Lung utilisation at rest
£115
Book this test
Save 39%75 min

September Package

Both tests in one session, then an 8-week training programme written from what they measure.

  • VO₂ Max test
  • RMR test
  • 8-week personalised training programme
£150£245 for the tests alone
Book the September Package
30 min

VO₂ Max Test

Know your exact aerobic capacity and personal heart rate zones. Train smarter, with every session in the right zone for your goal.

  • VO₂ Max & performance scores
  • Personalised heart rate zones
  • Respiratory & lung capacity
  • High intensity performance ceiling
  • Recovery capacity rating
£130
Book this test

What we measure

Every score you can find.

Filter by test to see exactly what data you'll walk away with.

VO₂ Max
High Intensity Performance
Respiratory Capacity
Lung Utilisation
Fat Burning Efficiency
Metabolic Flexibility
Oxygen Circulation
Recovery Capacity
Breathing Coordination
Metabolic Rate
Your Caloric Needs
Fat Burning at Rest
Metabolic Dysfunction Risk
Heart Rate Variability (HRV)
Lung Utilisation at Rest
Sympathetic/Parasympathetic Balance
Breathing Coordination at Rest
Cellular Health Score

Online coaching

Can't get to Winchester?
Train with us anyway.

Online training and nutrition coaching for strength, CrossFit and endurance athletes, wherever you are. Your programme is written around your goals and your schedule, delivered in our app, and adjusted every week.

Explore online coaching
  • StrengthPeriodised blocks around your lifts
  • CrossFitStrength, engine and skill in balance
  • EnduranceZone training from your own data
  • NutritionCalories and fuelling that match it
James, founder and coach at Input Performance

A coach with you, every step of the way.

I write your plan, read your week and adjust it myself. Message me any time in between.

Start your enquiry

Real results

What people are saying.

I'd been training for an Ironman on guesswork. The VO₂ test showed my zones were completely off. I was going too hard on easy days and not hard enough on intervals. Fixed that and knocked 14 minutes off my half-iron time.

Mark T.·Triathlete & cyclist

I was eating 1,400 calories thinking that's what I needed to lose weight. The RMR test showed my metabolism was actually burning way more than that. I'm eating more now and finally dropping body fat. Wish I'd done this years ago.

Sarah K.·Weight loss · gym-goer

Ran my first sub-40 10K after adjusting my training zones from the test. The report was dead clear, no confusing graphs, just 'here's what to do.' James was brilliant at explaining everything too.

Dan P.·Club runner

Not a competitive athlete at all, I just wanted to understand why I was always tired by 2pm. Turns out I was barely burning any fat at rest. Changed my nutrition off the back of the results and my energy is so much better.

Lucy M.·General fitness

What happens next

A plan, not just data.

Every score comes with specific recommendations across exercise, nutrition and lifestyle, so you know exactly what to do next.

Exercise

Resistance Training

Strength work builds muscle mass, increasing oxygen uptake and metabolic rate, which directly improves your test scores over time.

Interval Training

Zone 4–5 work improves heart function and lung capacity, pushing your VO₂ Max higher with every block.

Zone 2 Endurance

Low-intensity aerobic work trains your cells to absorb and utilise oxygen more efficiently across the whole body.

Nutrition

Beetroot & Nitrates

Foods rich in nitrates dilate blood vessels, boosting oxygen delivery to working muscles during exercise.

Iron-Rich Foods

Adequate heme-iron supports healthy haemoglobin and red blood cell production, essential for oxygen transport.

Calorie Precision

Knowing your RMR means your nutrition plan is built on real data, not generic calculators that miss by 300+ calories.

Lifestyle

Exercise Timing

Completing high-intensity work in the afternoon aligns with your natural cortisol curve for better output and recovery.

Sleep Quality

7–8 hours of quality sleep directly improves physical recovery and raises your VO₂ Max ceiling over time.

Body Composition

Reducing body fat by just 5% can meaningfully improve your VO₂ Max, and your test tells you exactly how to get there.

Ready to stop guessing?

Book your metabolic test and walk away with a clear, personalised plan. Or take the September Package for both tests and an 8-week training programme.

RMR Test
£115
VO₂ Max
£130
September Package
£150
Save 39%
Book your test