Well Sadly it takes one oops to break a bone for me, already broke a rib crashing. Darn handlebars. I even got a semi recumbent to help with that problem. Knock on wood haven't hit the pavement since. Knock on wood. LOL I am not known for my coordination.
Straps do sound good though as sometimes the feet do slip, but I have arthritis in my one foot so have to have the push power further back. I think that would mean specially made shoes. And so probably not gonna happen. Since its just to keep fit and have fun with friends. Plus my dog LOVES to run alongside the bike. Its almost as good as riding the horse down trails.