Working out your BMR
 

This is just one formula thats out there!

To calculate your BMR based on lean body weight (Katch-McArdle Formula)

BMR (both sexes) = 370 + (21.6 x lean mass in kg)

THis will give you what your body requires for all of your basic biological processes, such as digestion, nerve transmission, respiration etc, or your basal metabolic rate.

NEVER DROP YOUR CALORIES BELOW THIS LEVEL!!!!!

To figure out how many calories you need for the day multiply your BMR by your activity levels
Sedentary BMR x 1.2 no exercise/desk job
Lightly active BMR x 1.375 light exercise/sports 1-3 days/week
Moderately active BMR x 1.55 moderate exercise/sports 3-5 days/week
Very active BMR x 1.725 hard exercise/sports 6-7 days/week
Extremely active BMR x 1.9 hard daily training/physical job or training 2x/day

To lose weight, obviously, you do need to burn more calories than you need!!
So, take about 10-20 % off of your total calorie requirements

Robbie

Great read.