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Energy of a human climbing up stairs

  1. May 21, 2016 #1
    1. The problem statement, all variables and given/known data
    According to the "internet", the efficiency of humans to climb stairs is about 25%. How much energy does a person weighing 80kg use to climb from the 4 flights (12.95m total) floor of the von Haast building?


    2. Relevant equations
    change in potential energy of a system is = mg(zfinal-zinitial)

    3. The attempt at a solution
     
  2. jcsd
  3. May 21, 2016 #2
    How much times the change in potential energy does the human need, if one quarter of his work will become potential energy?
    Hope this helped.
     
  4. May 21, 2016 #3

    Simon Bridge

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    Welcome to PF;
    Do you know what "efficiency" means?
    Where did you get the 25% figure?

    It is consistent with text books - at 20-30% being the usual range quoted.
    That is very efficient for an engine... though you only get that by climbing fastish: about 50 or so steps per min.
    (Textbook of Work Physiology: Physiological Bases of Exercise p69, 2003 by Per-Olof Åstrand et al.)
     
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