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

https://shed-wiki.win/index.php/12_UK_Mobility_Scooters_Facts_To_Make_You_Think_Twice_About_The_Cooler._Cooler

Appropriate posture on a mobility scooter consists of feet flat, back supported, and elbows relaxed; adjust seat height and tiller for ergonomic control.