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Stationary Bike Exercise


DavidStack

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Looking at the stationary bike that my dad bought for my mom for too much money, I realized that all these bikes do is take a normal bike and add friction to it in order to give the feeling like you are actually riding a bike. The friction of some material on the bike tire requires work to overcome it, and since W=Fd, the work required is the frictional force times the distance traveled, so you burn however many calories the work you did is equivalent to. Therefore, you can create one of the machines yourself very cheaply. You can create a simple frame using 2x4's, making a base and two A frames that the bike frame can rest into. Then take whatever bike you use during the summer time and attach a cork or something of the sort to the back of the frame that can put pressure on the back wheel and shabam! You have a beautiful exercise bike for your living room like the one below.

etrainer1.jpg

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