Down to details, according to the book, the formular for calculating the amount of calories per day is (for women):
655.1 + (9.56 x weight) + (1.85 x height (in centimetres, eg 165 for 1.65m) - (4.68 x age)
Then you multiply for activity level.
1.3 is sedentary, as in at a desk and no exercise/exercise rarely
1.4 is exercise moderatly 1-3 times a week
1.55 is exercise moderately 3-5 times a week
1.725 is heavy exercise 6-7 times a week
1.9 is 'training for a marathon' type exercise
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What other calculations have people used to work out how much we 'need' or 'should' have for losing and/or maintaining weight?