I am a stroke survivor since 2003. My husband and I tried some friend terratrike ramblers out last week and I think I may have found a bike I can really use with confidence. My stroke was at age 43 and I have weakness in my left leg and arm. My foot tends to drop off the pedal as my hamstrings don't work well. Can anyone tell me if they make something to hold you affected foot on the pedal, perhaps a strap or foot pedal? Thank you in advance.