"Mark Oueis" <markoueis RemoveThis @hotmail.com> wrote in message
news:b1800bd3.0406071705.4d27f238@posting.google.com...
> There are a billion sites about this but none have my answer.
>
> How many calories does a person weighing "m" kilos burn climbing a
> specific "d" distance (meters) of stairs.
>
> Is there a formula for this.
>
> I know it also depends on the speed and etc but that should not make
> too much of a difference since most of the energy is clearly used in
> carrying the body up.
>
> Work = Force * Distance should work when taking muscle efficiency to
> be 25%. but the numbers i get always seem to be lower then the
> approximations posted on some websites. Am i missing something
>
> I would really like a formula, no matter how complicated, that i could
> use to calculate this.
>
> I have this
> WALKING UP A GRADE (at speeds btwn 50 & 100 metres/minute)
> kcal = ([.1 * S] + [1.8 * S * G] + 3.5) * BW * DUR / 1000 * 5
> where G = percent grade (expressed as a decimal e.g., 12% = .12)
> S = speed (metres/minute)
> BW = body weight (kg)
> DUR = duration of workout (minutes)
>
> which i got from another post, but i timed myself, and walking up a
> flight of stairs at 50 meters /sec is twice as fast as i would
> normally do it. So i assume that formula is meant to be used on an
> incline much less then that of stairs.
>
First of all, it seems to me like if you are trying to calculate how many
calories you are using to go up a flight of stairs, you are also going to
have to include the earth's gravitational pull on your body which is usually
g = 9.81 m/s^2 somewhere in there as this is what is actually causing the
resistance of going up stairs rather than just walking on a flat surface.
So I am guessing you need mass * g somewhere or the equivalent. This could
be completely wrong or could be accounted for already somehow. I am not
sure what or why any of the constants in your equation are there. What you
really need to do is open up a physics book. It has been much too long
since I have taken a course in physics, but I do recall equations pertaining
approximately to your question. I think what you want is a derivation of
newton's second law of motion, but once again I could be completely off.
>> Stay informed about: Calories burned climbing stairs