Lazy/Unfit Jockeys?

Ive heard many say they have done their balls on a horse
maybe that's what they meant

Neither.

So why do some jockeys do it sometimes, and other times they don't?

To re-establish the horse`s running rhythm but never a good sign if required.

Pat Eddery did this his whole career did he not.

after 971 rides this year
1200 last
1022 previous

yep - unfit NAP

Probably requires more stamina for him to keep banging his arze on the horses' backside then just standing..

Don't forget the up at 5 daily to go ride out 3 to 5 lots before off to work.

Glad you brought this up mok..

Only in UK will you see this riding 'style' In all the years I've followed racing I've rarely seen this cause a horse to do anything but

loose places.

No doubt the stewards will,as most pundits,consider the rider to be trying to get the horse to run faster.

I'm convinced that the laws of physics would clearly show the reverse to be true.

If you've ever tried to run with a pack on your back you will realise how much of an impediment something bouncing up and down on you is.

It's certainly not a question of fitness.

roggrain - your comments are exactly what I was thinking. Maybe not laziness or unfitness. What about trying to get the horse to slow down?

I think ye are correct, roggrain, though isn't something similar done on hunters and at eventing?
The point of the pedals and straps is to spread the jockey's weight around the saddle area, imo. Impact force from the bouncing ar se cannot be much help when racing ( riding may be a different matter).