Resting Metabolic Rate (RMR) is the number of calories your body burns while at rest. It represents the energy required for basic bodily functions, such as breathing, circulation, and cell production. RMR is influenced by factors like age, gender, weight, and muscle mass, with individuals who have more muscle generally burning more calories at rest. Measuring RMR can help individuals understand their energy needs and manage their weight effectively. It is often assessed through indirect calorimetry, which measures oxygen consumption and carbon dioxide production. Knowing your RMR can assist in creating a balanced diet and exercise plan tailored to your specific goals.