Quarterback or Halfback.
A corner Back or defensive end.
If your fast: cornerback or wide receiver
a defensive end or half back depending on speed
you should play wide ... anything that you are good at!!!!
Do you mean "what position should your feet be in when riding a horse?" If so then this is the answer: you should have your heels down and knees bent with your feet right beside the girth.
The arms should be on the floor and the feet should be at the side The arms should be on the floor and the feet should be at the side
one feet .