Basal Metabolic Rate and Daily Calorie Needs

Even if your body is at rest, it still needs energy for the functioning of your vital organs. The Basal Metabolic Rate (BMR) is that energy that your body would consume if you would stay in bed all day. Hopefully you are not in bed all day, therefore the BMR is the starting point to estimate the amount of calories you need in a day with your activity level.

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Basal Metabolic Rate

Basal Metabolic Rate and daily calorie consumption

It is possible to estimate from your BMR the amount of colories you need per day. This is done by multiplying your BMR by a factor which depends on your activity level.

It is also interesting to know how your BMR can change:

  • When you get older, your body will need less energy to function, this means that your BMR will go down. This is also the reason why you might feel that you gain weight more quickly as you get older.
  • When the mass of your body increases, your BMR will go up because more energy is needed to keep your body going
  • Likewise, as the mass of your body becomes less (when you lose weight for example), your BMR goes down as well.