Daily Calorie Expenditure
An individual's daily calorie expenditure is dependent on a number of factors:
Firstly it will depend on an individual's basal metabolic rate (BMR), which represents the number of calories burned at rest due to metabolic functions within the body. This is approximately equal to 25 calories per kilogram of body mass, per day.
The second factor to be considered is an individual's lifestyle and general activity levels. People who are generally more active throughout the day will consume more calories than an inactive person. Below is an approximation of the additional calories used due to lifestyle activity. This is only an approximation as it is difficult to clearly define levels of activity in this manner:
Sedentary Lifestyle (=BMR + 20 %)
Typical characteristics include having a desk-based job (office worker), driving to work, taking the elevator and not the stairs, etc.
Moderately Active Lifestyle (=BMR + 50%)
Typical characteristics include having a job requiring prolonged periods of standing (nurse or factory worker), walking or cycling to work, taking stairs not elevators, etc.
Very Active Lifestyle (=BMR + 75%)
Typical characteristics include having a manual job (labouring or exercise teacher), walking or cycling to work, taking stairs not elevators, etc.
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