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                                   Basal Metabolic Rate - BMR

Basal Metabolic Rate, is the minimum calorific requirement of body needed to sustain life. We can also
say that BMR is the minimum amount of energy (measured in calories) needed by the body to survive
or remain in bed asleep all day.


BMR can be responsible for burning up to 70% of the total calories expended, however this figure can
vary due to different factors.

Calories are burned by various body activities such as respiration, the pumping of blood around the
body and maintenance of body temperature etc.



Main Factors Affecting BMR

As we grow older, our BMR will steadily decrease. In young age BMR is higher and as we grow older
we have less lean body mass - slowing the BMR.

Also an individual can raise their basal metabolic rate by undertaking regular exercise. A person's
height is also a factor, a tall thin person will have a higher BMR than a shorter, fatter person. BMR will
increase in during pregnancy.


Short Term Factors Affecting BMR

Illnesses such as a fever, high levels of stress hormones in the body and either an increase or
decrease in the environmental temperature will result in an increase in BMR. Fasting, starving or
malnutrition all result in a lowering  of BMR.
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