How much Energy in watts do we produce per foot steps?

Question: How much Energy in watts do we produce per foot steps?
- Keywords:
  energy,
  foot,
  footstep,
  run,
  walk,
  watt
Asked by zaraa to Bob, Katie, Nisha, Sallie, Vee on 27 Jun 2012.
- Sallie Baxendale answered on 27 Jun 2012:
  
  That depends on how heavy you are and how big the footstep is.
- Bob Bonwick answered on 2 Jul 2012:
  
  Hmmmm I don’t think I’d like to guess. But I can say that every person will produce a different amount.
- Katie McDonald answered on 5 Jul 2012:
  
  I suppose it depends how the energy is transferred. You could measure it using a treadmill and dynamo to make electricity? I saw a comedy show once where all the lights and sound system were powered by green energy – two people on static bikes pedalling through the performance!

Question: How much Energy in watts do we produce per foot steps?