Advanced Health, Performance and Fitness Testing

Data-driven longevity and performance.

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Unlock peak performance with gold-standard VO₂ Max Testing and achieve your health, strength and weight loss goals with a convenient 7-minute Full Body DEXA Scan.

VO2 Max.
Performance and Longevity.

Train like a professional athlete.
Identify your true aerobic capacity and optimise your training for performance, health, and long-term longevity.

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DEXA Scanning
Find out what you're made of.

See exactly how your training and nutrition are shaping your body.
Optimise performance, health, and longevity with precision data.

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Resting Metabolic Rate Testing

Stop guessing your calorie needs.
Measure your resting metabolic rate to create a precise, sustainable nutrition plan.

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'Telomyx is the fastest, most accurate way to gain the edge, break through barriers, and finally achieve your health and fitness goals.' 

Dr Alex Trevatt - TELOMYX Clinical Lead

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Our Mission

For years, advanced health and fitness testing like DEXA and VO₂ max was only accessible to professional athletes or the very rich. At Telomyx, our mission is to change that — by making medical-grade insights available to anyone who wants to take control of their health and performance.

 

Founded by Dr Alex Trevatt, a qualified doctor, and Adam Kirby, a lifelong fitness enthusiast, Telomyx combines medical expertise with real-world training passion.

 

Together, we’ve created a mobile service that delivers the same gold-standard scans trusted by hospitals and elite performers - directly to gyms and workplaces.

 

Our goal is simple: to give you the most accurate data on your body and fitness, so you can achieve lasting results, protect your health, and perform at your best.

FAST.
ACCURATE.
CONVENIENT.

DEXA SCAN - HOW IT WORKS

01. Find a location

We are mobile, which means we have an ever growing number of sites that you can choose from. Choose a location that works for you.

02. Scan

A quick, non-invasive 7-minute scan inside our mobile clinic.

03. Get your results

Get a detailed body composition report, including fat, muscle, and bone density insights.

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Find a test location near you

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Stop Guessing. Get Answers.

Use accurate data to help achieve your goals.
Al-powered DEXA scans show you exactly how your lean mass, fat mass, and skeletal health are changing.
Blood, DNA, and microbiome testing reveals key insights about your hormones, gut health, genetics, and more.
VO2 Max testing is the top predictor of all-cause mortality, and helps you optimize your cardio fitness. and health..
Discover your body score, biological age, and other personalized insights from your results with DexaFit ai..
RMR testing pinpoints the precise number of Calories you burn and how your metabolism impacts your health.
Wellness pros, physicians,. and coaches are available in the DexaFit Marketplace to help you achieve your goals.

Frequently Asked Questions

What is a DEXA scan and why is it important?

A DEXA (Dual-Energy X-ray Absorptiometry) scan is the most accurate way to measure body composition. It gives you a precise breakdown of fat, muscle, and bone density — data you can’t get from scales or fitness trackers. This level of detail helps you understand your body, track progress, and make smarter training and nutrition decisions. That’s why elite athletes and sports teams worldwide rely on DEXA scans.

What is VO₂ Max testing and what does it show?

VO₂ Max testing measures the maximum amount of oxygen your body can use during exercise — the gold standard for assessing cardiovascular fitness. It tells you your fitness level, your optimal training zones (Zone 2 to Zone 5), and how efficiently your body uses oxygen. This is essential for endurance athletes, but also hugely valuable for anyone looking to improve fitness, burn fat more effectively, or increase longevity.

What is Resting Metabolic Rate (RMR) testing?

RMR testing shows how many calories your body burns at rest each day. This is the foundation for building an accurate nutrition plan. Whether your goal is fat loss, muscle gain, or weight maintenance, knowing your RMR means you can set calorie targets with precision rather than guesswork.

Why should I track my body with DEXA, VO₂ Max, and RMR together?

Each test gives you a different piece of the puzzle:

 

- DEXA → body composition (fat, muscle, bone)
- VO₂ Max → cardiovascular fitness and training zones
- RMR → calorie burn and metabolism


Combined, they provide a complete picture of your body, performance, and health — allowing you to create truly personalised training and nutrition plans, track progress, and achieve your goals faster.

How do these tests help me achieve my goals?

If your goal is fat loss: RMR tells you how much to eat, while DEXA shows whether you’re losing fat (not muscle).

If your goal is muscle gain: DEXA tracks muscle growth precisely, so you can see if your training is effective.

If your goal is fitness and performance: VO₂ Max identifies your training zones so you can build endurance and maximise results.

If your goal is longevity and health: all three tests help you reduce visceral fat, maintain lean mass, and keep your heart and metabolism strong.

Are these tests safe?

Yes. DEXA scans use a very low dose of X-ray, far less than a chest X-ray, and are considered safe for adults. VO₂ Max and RMR tests are completely non-invasive — you simply breathe into a specialised mask while exercising (for VO₂ Max) or at rest (for RMR).

How long do the tests take?

DEXA: 7 minute, scan (up to 30 mins appointment)
VO₂ Max: 15–20 minutes
RMR: 15–20 minutes
You can book them individually or combine them for a complete assessment in under an hour.

Who should get these tests?

These tests are beneficial for:
- Anyone struggling with weight loss or muscle gain
- Athletes aiming to optimise performance
- People focused on health, fitness, and longevity
- Anyone who wants a clear, objective baseline to track progress over time

Why should I track my body with DEXA, VO₂ Max, and RMR together?

DEXA: every 3–6 months to track meaningful changes in body composition
VO₂ Max: every 2–3 months, or at the start and end of training blocks
RMR: every 6–12 months, or after significant changes in weight or training

How do these tests help me achieve my goals?

Telomyx runs mobile clinics at gyms and wellness centres across the UK. Find your nearest location and book directly online.