Stop Guessing. Start Measuring.
Metabolic Testing
For a comprehensive analysis of metabolic efficiency, cardiovascular fitness, and body composition, look no further.
From full metabolic testing with VO₂ Max to resting metabolic rate (RMR) and respiratory exchange ratio (RER) testing we provide elite-level insights for optimizing health and performance.
Who Benefits From Metabolic Testing?
Metabolic testing reveals how your body uses energy, guiding smarter training, recovery, and health decisions. Whether you're an endurance athlete fine-tuning performance, a fitness enthusiast optimizing workouts, a patient in cardiac or pulmonary rehab, focused on fat loss without sacrificing muscle, or simply committed to long-term wellness, metabolic insights help you reach goals efficiently and safely.
Endurance athletes (runners, cyclists, swimmers)
Fitness enthusiasts looking to optimize training
Clinical patients in cardiac or pulmonary rehab
People trying to lose fat without losing muscle
Anyone interested in their long-term health
Get Started
VO₂ Max Test
A VO₂ max test (maximal oxygen uptake test) is a performance and health assessment used to measure the maximum amount of oxygen your body can use during intense exercise. It's often considered the gold standard for evaluating cardiovascular fitness and aerobic endurance.
Key benefits of a VO₂ Max test:
- Accurate Measure of Cardiovascular Fitness
- Helps define your:
- Aerobic threshold
- Anaerobic threshold
- Fat-burning zone
- May detect early cardiovascular or pulmonary issues
- May be a good indicator for longevity
Resting Metabolic Rate (RMR)
A Resting Metabolic Rate (RMR) test measures how many calories your body burns while at complete rest—essentially the energy needed to keep vital functions like breathing, circulation, and cell repair going. By revealing how many calories you naturally expend each day before activity or exercise, it provides a highly personalized estimate of your daily calorie needs. This insight can help guide nutrition planning, weight management, and performance goals with far greater accuracy than generic calorie calculators.
Key Benefits:
- Learn how many calories your body needs
- Identify metabolic slowdown
- Support fat loss without muscle loss
Respiratory Exchange Ratio (RER)
A Respiratory Exchange Ratio (RER) test measures how your body is using energy by analyzing the gases you breathe out. It reveals whether you are primarily burning fat or carbohydrates at a given moment and provides insight into your metabolic efficiency and fuel utilization during rest or exercise.
Key Benefits:
- Understand if you're burning fats or carbs
- Optimize training and nutrition
- Improve fat oxidation
- Monitor metabolic efficiency
VO₂ Max Test $299
Unlike other standard VO₂ Max tests, Preamble uses a slower ramp-up for accurate exercise threshold, custom heart rate training zones, and your VO₂ Max.
Select AssessmentResting Metabolic Rate (RMR) & Respiratory Exchange Ratio (RER) $149
Lab-grade breath-by-breath analysis of calorie burn and fat metabolism. Understand how many calories your body burns and requires. We also use this test to determine your personalized fuel source of carbohydrates or fats during metabolism.
Select AssessmentTake Health Optimization to the Next Level
Looking to go even further into your health data? The comprehensive Preamble Program features personalized, data-driven options tailored to support ongoing health optimization and peak performance.