Appropriate posture on a mobility scooter includes feet flat, back supported

https://paxtonabdc753.lucialpiazzale.com/why-cheap-mobility-scooters-is-a-must-at-the-very-least-once-in-your-lifetime

Appropriate posture on a mobility scooter includes feet flat, back supported, and elbows unwinded; change seat height and tiller for ergonomic control.