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Basal metabolic rate

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Basal metabolic rate is a measure of basal metabolism. It is standardly expressed as heat production per unit of body surface area per day. Uniform criteria are taken for its measurement, so minimizing the effects of variation with:

  • age
  • sex
  • body weight
  • height
  • time of day
  • hormonal variations e.g. individual thyroid function, time of month in females
  • recent food
  • recent exercise
  • ambient temperature variation

For the average man, BMR is about 7 megajoules per day. In practice, the resting metabolic rate is a more practical index used in the assessment of energy requirement.


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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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