Manuel or electric treadmill???

I am thinking of getting rid of my stat bike, hurts my tailbone. and replacing it with a treadmill. SHould I get a manuel or electric one? Or some other piece of equipment? The eliptical trainers look fun too. Wendy

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.