Basal metabolic rate (BMR) is the energy needed at rest to maintain life-sustaining activities for a specific period of time.
The number of calories you burn as your body conducts basic (basal) life-sustaining functions even as you sleep is known as your Basal Metabolic Rate (BMR).
Your BMR determines your basal metabolic rate, which is about 60-70% of the calories you consume. This includes the energy your body expends to keep your alive and the breathing body running, such as:
Age, weight, height, gender, environmental temperature, eating, and exercise habits all have an impact on your individual metabolism rate, or BMR.
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