I have a lot of trouble keeping my feet on the pedals. No clips, just a pair of running shoes and some cheap pedals that came on my Alpine 350. A lot of time when I land my feet either roll on the pedal (pedal spins and my foot goes foward), my foot bounces off the side, or one foot falls off slaming the pedal into my shin. Any tips how to keep them on? I have racked up a lot of cuts and bruises on my shins at the moment.