screenman said:jimboalee, I think you burn between 50 and 53 calories per hour when sleeping , depending on how much you move about, Traveling in a coach you will use even more per hour.
When you've had a skinful of beer and are fast asleep under a hedge facedown in the snow, you'll burn a damn sight more than 53 kCals/hour.
The average man's ( 50 yrs old, 175 cm, 75 kg; = 1.75 m^2 body surface area ) Basal Metabolic Rate will be 65 kCals per hour.
BMR reduces with age.
The value of BMR is assumed the person is covered in insulation that keeps their surrounding boundary layer at Neutral Skin Temp; or 33 Deg C.
A good quilt should do this.
The calculations to formulate this result are in the first week's lessons at the Royal College of Nursing.