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Metabolic (VO2Max and RMR) Testing and Coaching For Performance & Weight Loss

How Can We Help?

Group Personal Training in Birmingham

Box Group Personal Training offers a dynamic environment where fitness goals are pursued collectively, yet achievements are personal. In these sessions, you’ll find the encouragement of a group pushing you forward, while our trainers provide focused attention to your individual needs. This format is ideal for those who thrive in a team setting but still value the tailored approach of personal training. It's about shared experiences, diverse challenges, and the joy of reaching fitness milestones together.


Metabolism Testing For Weight Loss

Our signature 6 Week Programme, is a clinically-proven programme which helps you target your fat loss through metabolic testing. This means that we can find out exactly how many calories you should eat each day in order for your body to burn fat without over restriction.

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Hybrid & Hyrox Performance

Are you a Hyrox athlete looking to elevate your performance to new heights? As an official HYROX training provider,  Box Nutrition and Performance specialise in providing bespoke training plans and comprehensive testing that focus on improving both your running endurance and strength. By integrating the most effective training methodologies from the worlds of endurance and strength sports, we help you achieve your goals with a balanced, sustainable approach.

We understand that Hyrox events demand a unique blend of strength, power, speed, and endurance. That's why our training plans are grounded in the latest sports science and tailored to your specific needs, goals, and current fitness level.

Metabolic and VO2Max Testing.

Metabolic testing and VO2Max Testing is the gold standard assessment for measuring how many kcals you burn (your metabolism) and the type of fuel you use (e.g. fats or carbohydrates). It is used to help assess your fitness levels, generate personalised training zones and identify your fat max.

Our VO2Max and RMR tests gives you the most comprehensive and insightful health assessment allowing us to develop an accurate nutrition and workout plan to help reach your goals.

Nutrition Coaching

Box Nutrition provides one:to:one nutrition coaching. All programmes are built around you, your goals and your lifestyle to reach the results you are after.


Whether you'r looking to shed a few pounds or improve in your sport, our proven framework provides you with a plan that guarantees results.

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What is Fitness Testing?

Fitness testing is vital for those who are looking to improve their fitness and become healthier. One of the most important tests is VO2Max, which measures how much oxygen your body can utilise during exercise.


The test is performed on a treadmill or stationary bike, and involves gradually increasing the intensity of the workout until you reach your max level. At this point, your heart rate and oxygen consumption will be measured and used to calculate your VO2Max score.


This score can be used to track your progress over time and see how your fitness has improved. In addition, it can also be used to set realistic fitness goals.


My name is Jack Braniff and I help individuals lose weight with metabolic testing and tailored nutrition and exercise programmes.


I'm the founder of Box Nutrition, nutrition and performance coach based in Birmingham and have my Masters degree (MSc) in Sports and Exercise nutrition. I'm also author of top-rated sports nutrition book "Fuelling The Functional Athlete", which is available from Amazon.

Our goal at Box Nutrition is to help you feel better, look better and perform better. Whether your goal is to transform your body, lose a few pounds, or compete in your chosen sport, we can help you get there. 

Jack Braniff MSc


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Chrissy - Weight loss
Phoebes - Weight loss
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Adam - Body composition
Jack - Performance and body composit
Scott - Body Composition
Wayne - Performance and body compose
Ben - Body composition
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