Supports for both feet or both hands performing simultaneously the same movement

Official title: {Supports for both feet or both hands performing simultaneously the same movement, e.g. single pedal or single handle (A63B21/0724 takes precedence)}

A63B23/03525 (Supports for both feet or both hands performing simultaneously the same movement) appears on 1,283 US grants and 1,171 published applications in this corpus.