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Treadmill vs. Running: Force and work factors/differences

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  • Treadmill vs. Running: Force and work factors/differences

    I am a layman who is intrigued by the comparative physics,forces and =
    work related to exercising on a treadmill and doing a similar horizontal =
    movement on a stationary surface. (say running a mile on a treadmill and =
    doing a similar mile, same pace, flat surface, even surface on pavement) =
    First: do you burn as many calories on a treadmill as doing a similar =
    distance on a flat, smooth surface? If I do 2 miles on a treadmill am I =
    burning the same number of calories during the exercise as if I ran =
    it/walked it on a flat, non moving surface? Why or why not? And what are =
    the forces involved? Is the force component friction of your foot on =
    the surface? Or is it the up and down movement of your legs that small =
    distance multiplied by hundreds (thousands) off the surface? (Ignore =
    wind resistance, up and down for curbs and balance required for jogging =
    on irregular paths)

    I have been a long time jogger until double hip surgery put me in my =
    place...on a treadmill...yet all that time I had believed it was the =
    body mass being moved a horizontal distance...beliefs can be =
    engineering friend observed that there is really=20
    no significant lateral force component on moving a body (jogging) =
    horizontally on a flat surface (friction maybe???) certainly one moving =
    it vertically, (ie opposite gravity). So what forces and vectors of =
    those forces make you sweat on a flat surface after running two =
    miles...? I know SOMETHING does...what is it??? Friction, Movement of =
    the body up and down, movement of the legs and if it's movement of the =
    body up and down, can you burn up the same number of calories by staying =
    in one place and marching, jogging up and down? How important is the =
    lateral component? Did I run a few thousand miles in my life and could =
    have gained the same benefit by jogging in place? If that is yes, you =
    may hear a grown man cry!

    I go to the gym now and do the treadmill and see the stair steps and =
    circular/motion type the only component vertical? And is a =
    stair stepper doing the same as a horizontal runner? But then why am I =
    gasping for air when I run, even=20
    a little distance, but not when I do the stairstep?

    Thanks...the simpler the response the better, although I am generally =
    familiar with physics, force vectors, components, just not their =
    application to the real world of exercise...And if anybody knows =
    references that I can go to find this that would be fine...
    I am not that familiar with bio-mechanical references....just what's on =
    the internet available for a non-business or university related =

    Ben Hammond
    Montgomery AL

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