What is Resting Metabolic Rate (RMR) Testing?

Resting Metabolic Rate (RMR) testing is a precise, non-invasive assessment that measures how many calories your body burns at complete rest. Using laboratory-grade indirect calorimetry technology, we analyse your oxygen consumption and carbon dioxide production to determine your metabolic rate.

RMR testing provides a personalised measurement of your energy expenditure. This information can help inform targeted nutrition and lifestyle strategies that support fat loss, muscle gain, metabolic health, and long-term wellbeing.

What Does RMR Testing Reveal?

RMR testing provides several key insights into your metabolic health:

• Your Calorie Needs at Rest – We measure your Resting Energy Expenditure (REE), the number of calories your body requires to maintain basic functions such as breathing, circulation, and cell repair while at rest.
• How Your Metabolism Compares – Your results can be compared with population norms for individuals of similar age, sex, weight, and height, providing additional context for your individual metabolic rate.
• Resting Heart Rate – Resting heart rate provides additional information about cardiovascular health and fitness.
• Heart Rate Variability (HRV) – HRV provides information about autonomic nervous system activity and can be considered alongside other measures of recovery, stress, and fitness.

Why is RMR Testing Important?

Understanding your metabolic rate can help inform energy balance – the relationship between the calories you consume and the calories you burn.

RMR testing can help inform strategies to:

• Maintain weight – Understand your individual energy requirements.
• Lose body fat – Inform an appropriate and sustainable calorie deficit.
• Gain lean muscle – Inform nutrition alongside an appropriate resistance training program.
• Support metabolic health – Lean muscle mass contributes to resting energy expenditure and plays an important role in long-term metabolic health and healthy ageing.

How Your Body Burns Energy

Your total daily energy expenditure is made up of several components:

• Resting Metabolic Rate (RMR) – energy used at complete rest and typically the largest component of daily energy expenditure.
• Non-Exercise Activity (NEAT) – energy used for daily movement, walking, and other activities.
• Exercise – energy used during structured physical activity.
• Thermic Effect of Food – energy used to digest and process food.

RMR testing provides an individual baseline that can be considered alongside daily movement, exercise, and nutrition.

How You Take In Energy

The food you consume provides energy in the form of calories from carbohydrates, proteins, and fats. The quality, quantity, and timing of your nutrition can influence body composition, energy levels, and metabolic health.

At Aura Longevity, we use your RMR results alongside other assessments, such as DEXA and blood biomarkers, to inform personalised nutrition strategies based on your individual goals.

Supporting Body Composition

Body composition – the ratio of muscle, fat, and bone – provides useful information beyond body weight alone. Evidence-based strategies may include:

• Prioritise protein intake – adequate protein can help preserve and build lean muscle, particularly during periods of fat loss.
• Build and maintain muscle – resistance training can support lean muscle mass and metabolic health.
• Increase daily movement – non-exercise activity contributes to overall daily energy expenditure.
• Avoid excessive calorie restriction – significant calorie restriction can contribute to loss of lean muscle and changes in energy expenditure.

Changes in body weight alone may not reflect changes in body composition, which is why measures such as muscle and fat mass can provide additional information.

Why Choose Aura Longevity for RMR Testing?

At Aura Longevity, RMR testing is integrated into a comprehensive approach to long-term health. We combine personalised metabolic data with advanced diagnostics, clinical interpretation, and individualised recommendations to support sustainable long-term outcomes.

Whether your goal is fat loss, muscle gain, improved energy, or long-term metabolic health, RMR testing provides objective data that can help inform personalised health and lifestyle decisions.