Metabolic Testing

A Plan Built Around You And Your Physiology

Are you a recreational sportsman who wants to get faster, fitter and stronger?


Are you not seeing as much progress as you'd like?


Maybe you're confused with what works and what doesn't?


We can help. 

Using VO2Max and metabolic testing, Box Nutrition can provide you with a tailored approach to your training and nutrition, based around you and your physiology.

We understand that everybody is different, which means that your diet and training should not be personal to you.

This can be determined by metabolic testing.

Metabolic testing is what elite athletes use to know what to eat and how to train effectively.


And we can do it for you.

What we test

VO2Max - How big is your engine?


Velocity or power at your aerobic and anaerobic threshold - How good is your engine?


Running economy/cycling efficiency -What's your oxygen cost at your race pace


Fuel utilisation - How effective are you at burning fat?


Energy expenditure - how many kcals do you burn at different intensities/zones


RMR Test - How many kcals do you burn at rest

Not sure what test is right for you?

See our full range of tests here.

Testing Data

After testing, athletes will receive a complete breakdown and debrief session running through the testing data.


This includes:

  • Training zones and thresholds


  • Kcal expenditure and speed/watts at each zone


  • Metabolic efficiency point - carb vs fat burn


  • Identification of strengths and weaknesses against normative values


  • RMR report - resting metabolic rate and predicted daily kcal requirements

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Why Test With Box

  • Tested over 200 athletes

  • High end testing equipment also used by the military and university labs

  • Discounted group bookings available

  • Our portable analyser means we can travel to you or test on site

My name is Jack Braniff and I help athletes perform, look and feel their best. I'm the founder of Box Nutrition and a registered performance nutritionist (SENr, CISSN), have my Masters degree (MSc) in Sports and Exercise nutrition, a member of the British Dietetics Association and a UKAD anti doping advisor. I'm also the author of top rated sports nutrition book "Fuelling The Functional Athlete" which is available from Amazon.

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Book Your Test

For more information and to book your test, please click on the button below.

Once you have booked your testing, you  will be contacted beforehand  to discuss testing protocols.

Contact Us

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Available Tests


1. 7 Site Skinfold Body Composition Analysis

Our body composition assessment uses a skinfold assessment to accurately determine body fat levels.

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2. RMR Test

The Resting Metabolic Rate (RMR)  test determines how many calories your body burns at rest, which will help you us provide you with an accurate assessment of how much you need to eat based on your goals.


3. Metabolic Efficiency Test

The fat max test is an exercise protocol that measures the use of carbohydrate and fat for energy,  which can help determine which intensity of exercise is best suited for increased total fat oxidation (burning). This can be useful for endurance athletes training for long distance events (70.4, ironman and ultra) and individuals interested in body composition.



4. VO2 Max Test

A VO2 max is a test of aerobic capacity. Having a high VO2 max is a prerequisite for any successful endurance athlete. The VO2 max test enables us to accurately gauge your aerobic (fitness) levels,  pinpoint heart rate zones and thresholds, and monitor the effectiveness of your training.


5. Debrief Session and anlaysis

After your testing you will receive a debrief session to properly understand your data, so you are able to implement our recommendations into your training and nutrition plan.

Find us.

Friendly settings.

We are situated the between Wylde Green and Erdington in Birmingham, just 10-15mins walk from Wylde Green Station. We also operate from the Club and Spa in Birmingham city centre. 


Before any testing, we have a quick 15mins consultation This is just a quick chat to get to know you, understand your goals and go through what to expect during testing.

After your consultation, your metabolic testing will be conducted. You will then receive your results within 48hrs.