Most runners and HYROX athletes aren’t unfit — they’re just training in the wrong zones.
Here’s the problem:
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Easy runs done too hard
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Threshold work too easy
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Race pace guessed, not trained
Why? Because most people rely on generic calculators or “220 minus age” heart rate formulas. ❌
The result? Burnout, plateaus, and wasted training.
At Box Nutrition & Performance, we use the gold standard in running performance: VO₂Max and Lactate Testing.
Not sure which one you need? Don’t worry — we’ll guide you through it and build the right Blueprint for your goals.
That means your training zones are prescribed from your true physiology — not guesses, watch estimates, or generic formulas.
Every HYROX Running Blueprint includes:
✅ VO₂Max +/or Lactate Testing (we’ll choose what fits you best)
✅ Personalised HR + Pace Zones
✅ 4-Week Running Framework
✅ FREE RMR Test
✅ FREE Fuelling Guide
📅 Limited to 8 September slots.
What is VO₂Max Testing?
VO₂Max testing measures the maximum amount of oxygen your body can use during exercise. It’s the gold standard for assessing your aerobic fitness and endurance capacity.
But here’s why it matters for HYROX:
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It shows the point where your body shifts from using fat → carbs for fuel
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It pinpoints your true aerobic threshold (where easy runs should sit)
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It identifies your lactate threshold (the gear you’ll need on race day)
When combined with Lactate Testing, VO₂Max testing doesn’t just tell you if you’re “fit” — it tells you exactly how to train.
📊 The result: personalised training zones that take the guesswork out of your running.
Why It Works
We’ve tested hundreds of athletes — from HYROX competitors to runners chasing PBs. The difference is clear: when you train in the right zones, everything improves.
Endurance builds without burnout
Long runs actually feel sustainable
Threshold sharpens properly
You get faster where it counts
Race pace holds on the day
No more blowing up halfway through
🚨 September testing is now open. Only 8 slots available. Once they’re gone, testing won’t reopen until October — right before race week.
Here's How It Works
in 3 simple steps...
VO₂Max, Lactate, and RMR testing
Your personal running zones and fuelling need
4-week running framework to build into your HYROX prep.
What Happens Next
1️⃣ Book Your Discovery Call
Pick a time that works for you. It’s a quick, no-pressure chat.
2️⃣ See If It’s a Good Fit
We’ll talk through your HYROX goals, your current training, and whether the Running Blueprint is the right option for you.
3️⃣ Book Your Test
If it’s a good fit, we’ll book the testing package that is right for you: VO₂Max + Lactate test (and RMR test if you want the full package).
4️⃣ Get Your Results
Walk away with your personalised running zones, fuelling numbers, and a 4-week training framework you can plug straight into your HYROX prep.
📅 Only 8 September testing slots available — book your Discovery Call today.
Jack Braniff MSc
PERFORMANCE COACH
Like many of you, I've explored various aspects of fitness – from lifting weights to hitting the pavement. While I may not be breaking world records, my diverse experience over 15 years in coaching has given me a broad perspective on what it takes to excel in different fitness arenas.
As an official HYROX coach (foundation & Level 1) and gym affiliate, I'm deeply embedded in the world of hybrid training. My credentials include a master's degree in sports and exercise nutrition, certification as a Human Performance Hybrid Master Course Coach, and VDOT certified running trainer status. Plus, I've performed hundreds of VO2Max and lactate tests, giving me a thorough understanding of running physiology and what it takes to optimise performance.
Here's What This Means for You:
Whether you're passionate about strength training, endurance sports, HYROX competitions, CrossFit, or just general fitness, I'm here to help you find the ideal balance. My goal is to guide you towards unleashing your full potential, blending strength and endurance in a way that suits your personal goals and lifestyle.
Get in touch with me jack@boxnutrition.co.uk
