Metabolic Testing

A Plan Built Around You And Your Physiology

It can be hard to know what diet and exercise is best for you.


Box Nutrition and Performance is a metabolic testing company that provides personalised nutrition and exercise plans based on your individual needs. With the help of our scientifically proven and clinically validated testing, we will help get you to your goals in no time!


We offer a range of metabolic tests to help your design customised fitness and nutrition plans designed around your individual needs.

We understand that everybody is different, which means that your diet and training should be personal to YOU.

This can be determined by metabolic testing.

Metabolic testing is what we use to know what to eat and how to train effectively, whether you're an athlete or interested in weight loss.


And we can do it for you.

Based in Birmingham, UK, we help a range of individuals reach their performance and weight loss goals without the guesswork.


What is your Goal?

At Box, we offer two main types of metabolic testing depending on your goal.

Our Weight Loss Package - Ignite is a metabolic testing programme specifically designed for weight loss. This package includes a metabolism test (RMR), an option to do a metabolic efficiency test to measure fat burning and nutrition plans to go alongside your report.

Our Performance Package - Box Endure is for athletes looking to improve their performance and body composition.

We all also specific packages for runners and cyclists. See all our testing packages here.

What we test with metabolism testing

VO2Max - How fit are you?

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

Performance Testing

Performance testing also includes  speed and power at your aerobic and anaerobic thresholds as well establishing your training zones.

Not sure what test is right for you?

See our full range of tests here.

Testing Data

After a metabolic testing session, you 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 Your Metabolism With Box

  • Tested over 500 individuals

  • High-end metabolic 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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We are situated the between Wylde Green and Erdington in Birmingham (B24 0DE), 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.