The Best Foldable Machine: Vaunn Medical Pedal Exerciser The Vaunn Medical Pedal Exerciser ($39) folds away for easy storage. Those who live in compact spaces might enjoy this portable option that can be easily minimized to a smaller size for easy cleanup. With adjustable resistance and a digital monitor, you don't sacrifice effectiveness when you go small with this machine. Image Source: amazon.com Vaunn Medical Pedal Exerciser $39 from amazon.com Buy Now