Metabolic & Performance Testing
Precision insights for your metabolism, endurance, and longevity.
At The North Clinic, we use advanced PNOĒ technology to analyze your breathing in real time, offering an inside look at how efficiently your body uses oxygen and burns fuel. This data goes far beyond calorie calculators or fitness trackers — it’s the gold standard for understanding your metabolism and performance capacity.
Whether you’re working to improve energy, optimize nutrition, or enhance endurance, metabolic testing provides the personalized data you need to train smarter, recover faster, and live stronger.
VO₂ Max Testing
The most powerful predictor of longevity.
Your VO₂ max measures how effectively your body utilizes oxygen during exercise which is a direct reflection of cardiovascular fitness and mitochondrial efficiency. Research shows that VO₂ max is one of the strongest predictors of healthspan and overall vitality.
Benefits:
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Identify precise heart rate and training zones (Zone 2, threshold, recovery)
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Quantify cardiovascular efficiency and endurance potential
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Track progress and longevity metrics over time
Details:
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Treadmill or stationary bike protocol guided by clinical staff
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Personalized review and recommendations from Dr. Gray
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Duration: 45 minutes
Investment: $195
Resting Metabolic Rate (RMR) Analysis
Know your true metabolism.
This test measures your energy use at rest and determines how your body utilizes fat and carbohydrates for fuel. It’s ideal for anyone seeking clarity about caloric needs, metabolism efficiency, or sustainable weight management.
Benefits:
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Determine precise caloric needs for weight optimization
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Assess metabolic flexibility and efficiency
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Customize nutrition and recovery based on real data
Details:
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Conducted via indirect calorimetry using PNOĒ mask
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Non-invasive; no prep or bloodwork required
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Duration: 45 minutes
Investment: $129
Combined Testing Option
The complete metabolic picture.
For the most comprehensive insight, combine both VO₂ Max and RMR testing to understand how your body performs under stress and at rest. Together, these tests create a full metabolic profile — a 360° view of your energy systems that can transform how you train, eat, and recover.
Includes:
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VO₂ Max Test + Resting Metabolic Rate Analysis
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Full interpretation and discussion with Dr. Gray
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Personalized recommendations for training, nutrition, and recovery
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Duration: 30 minutes
Why It Matters:
Your metabolism is dynamic — shaped by genetics, environment, nutrition, and training. These tests give you a baseline to track meaningful progress over time, helping you strengthen not just your performance but your longevity.