My new gelind was a top show jumper a few years ago but after that he had a rider who never really released, would be interested in any ideas on how to get him jumping in a propper bascual agian rather then the hollow inverted jump he is doing at the moment. Have been doing lots of grid work on a long rein so he can stretch down and I am over enphisisng my release at the moment so if he wants to he can reach without me getting in his way at all. any other tips? I cant free jump cause the head instructor would kill me.
You are doing exactly what you should be doing.
When I cliniced under Dorothy Crowell - CIC**** CCI**** Eventer, I was on a TB with the same issue that I was riding/training for a client of the barn I worked at.
What Dorothy had me do, was approach the fence in a slow, rhythmical trot, put him in check 4 strides from the fence, and over exaggerate my release while grabbing mane and wrapping my leg around his girth to keep his back lifted.
It is about moving off of hind end, not forehand and jumping flat. It is about continuing to support him to the fence through your seat and lower leg. Lower leg lifts the back/ribs.
Proper Hand carraige is important as well - while remaining soft and supple.
Just keep at it. Remember, your seat, legs and aids are just as important at keeping him rounded as well.
But you are on the right track :)
Continue to remain at the trot. Until he gets it.