Pedal Your Way to a Cold Beer
by Lloyd Alter, Toronto 
on 10.31.08
Clever Austrian engineers connected a heat pump to an exercise bike; you drop a can into the copper coil and start pedalling. If you have had enough beer, you can drop a coffee into the other coil on the hot side. Nice way to end a hard exercise session!
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For many a man this could be the best (and maybe only) motivation for exercising.
Now that I think about it - what about portable space resistamce-heater? A person pedalling like mad can easily generate some 600 watts. Not to mention the fact, that they would probably no longer feel cold after a 15 min session:)
Great idea, the large fitness would be use it to cooling their area as air conditioner, or generate electric for free