miners that takes energy from physical exercise? i don't think it's possible....you need a very big amount of energy, you cannot do it with a bike.
if you're interested in finding a way to mine some coin from physical activities you should check out Mangocoinz!
I'll show you guys what I mean when it's done... It's not running the miner directly from it.
It's storing power in a battery bank for later then switching back to your home electricity.
Or just chipping off cash from your monthly home electric bill.
There's no way you can do this from pedal power it's impossible.