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Hi Everyone
I am a personal trainer and this is the formula I use to work out BMR and then the total amount of calories a person should consume. I find it works really well.
To work out BMR
-Men: BMR= 66 + (13.7 x weight in kg) + (5 x height in cm) – (6.8 x age in years)
-Women: BMR= 655 + (9.6 x weight in kg) + (1.8 x height in cm) – (4.7 x age in years)
Eg. Kelli is 36 years old, is 171.5cm tall and weighs 70kg
BMR = 655 + (9.6 x 70) + (1.8 x 171.5) – (4.7 x 36)
= 655 + 672 + 308.7 - 169.2 = 1805 calories per day
Then to work out how many calories to add to that number based on your activity you multiply your BMR by;
1.2 if you are sedentary (little or no exercise, desk job) or
1.375 if you are lightly active (light exercise or sports 1-3 times per week) or
1.55 if you are moderately active (moderate exercise or sports 3-5 days per week) or
1.725 if you are very active (hard exercise or sports 6-7 days per week) or
1.9 if you are extremely active (hard daily exercise, sports & physical job or marathon/ultraendurance events)
So if Kelli in the above example was moderately active we would multiply her BMR of 1805 by 1.55 to get 2798 calories per day. That’s what she needs to consume to maintain her current weight… if she wants to lose weight we would reduce that by a maximum of 20% which equates to 80% of 2798 = 0.8 x 2798 = 2238.
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