AVERAGE DAILY REQUIREMENT OF CALORIES::
Even if we lie down in bed without food we need 40 C per hour per sq metre of surface area of the human body (Refer BMR) Average area of the body is 1.8 sq metre so one needs 40*1.8=72 C per hour to keep up the body heat this is continuously needed all the day and night thus BMR amounts to 72*24=1728 C per day Over and above this more heat is consumed during physical exertion digestion absorption and metabolism of food that one undertakes daily requirement of calories thus can be determined as follows
Sleep 8 hrs: (40*1.8)*8=576 C
Wakeful 8 hrs:(40*1.8)*8+174 C =750 C (For minor exertion)
Moderate exertion 8 hrs :(40*1.8)*8+1000 C =1576 C
Total calories for 24 hrs :2980 C (i.e.Approximately 3000 C)
Daily requirement may vary according to the intensity of work as given in
Average daily requirement of calories
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