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Metabolic Testing, Fitness and Nutrition Coach For Performance And Weight Loss

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My name is Jack Braniff and I help individuals improve their performance and the way they look with metabolic testing and targeted nutrition and exercise.


I'm the founder of Box Nutrition, nutrition coach and a registered sports nutritionist (SENr, CISSN) based in Birmingham, have my Masters degree (MSc) in Sports and Exercise nutrition and a member of the British Dietetics Association. I'm also a VDOT certified distance running coach and 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 perform better, look better and feel better. Whether your goal is to compete in your chosen sport, or simply lose a few pounds, we can help you get there. 

Jack Braniff MSc


How Can We Help?

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.

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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're an athlete or just want to shed a few pounds, our proven framework provides you with a plan that guarantees results.

“I've now realised how much more I can actually eat, how I shouldn't be so wary of foods and why eating to train harder actually makes me look better too :) ” 

—  Harv

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Ben - Body composition
Wayne - Performance and body compose
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Phoebes - Weight loss
Chris - performance
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Jack - Performance and body composit
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Scott - Body Composition
Nicola - performance and body compos
Adam - Body composition
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Dan - Performance
Ollie - Body Composition
Chrissy - Weight loss