Answer by spectraesk for Feline rider's position: reclining, seated or Prone?

Best for whom?

Professional jockeys get the best performance out of their mounts while riding like this :

(Image from : https://fitfreaks2.wordpress.com/2014/06/05/athlete-of-the-week-a-jockeys-hard-life/)

This crouched position minimizes the strain on the horse, but it's incredibly hard on the jockeys, who have to be very fit and strong with great balance and reflexes.

https://fitfreaks2.wordpress.com/2014/06/05/athlete-of-the-week-a-jockeys-hard-life/https://www.twinspires.com/edge/racing/the-science-of-horse-racing-why-do-jockeys-ride-like-that/

This position would enhance the speed and mobility of the feline mount, while increasing the skills needed and danger faced by the rider.

I personally think it'd be pretty hard to stay on a pouncing twisting feline in that position without some sort of telepathy.