One cool thing about my bike friday is that I can fit side bags on it so I can use it to carry stuff on or if I ever wanted to I could tour on it. It folds up small enough to fit into a medium suitcase. At any rate it doesnt matter if you choose to get a top of the line folding bicycle or just a cheap beach cruiser or for that matter just an indoor sit down exercise bike, Pedaling is really a great way to get your blood going using low impact fitness without damaging joints. Trust me at 300 plus pounds I could seriously hurt myself if I even tried to run around the block but I can (and do) ride my bike ten plus miles on a semi- regular basis.