Fixing your light-seat or jump position is easy 9/10. So here are my go-to's and quick fixes that help most jump position/light-seat problems.
1. Shorten your stirrups, and then shorten them again. SHORTER!! When I jump, I shorten my stirrups so that my knee is bent to a 90 degree angle. My thigh is at a right angle to my lower leg.
2. Heels down. Press forward and down with your heels to stop your leg sliding back over fences. If your leg slides back, you'll be less secure and might struggle to keep your hands independent. So heels DOWN.
3. Push your seat back towards the cantle - usually this happens quite naturally, the horse's movement normally does it for you. If your seat normally ends up over the pommel when you're in mid-air, you need to push your seat back.
4. Get out of your own way. If you keep your hands at the base of the horse's neck, they will end up in your way and you won't be able to fold properly. Think about pushing your hand towards the horse's ears a little bit, so they don't get stuck in your stomach.
5. LOOK UP, with soft eyes. Breathe, and allow your vision to include what's happening to either side of you. If you can only see a 1m square section of the wall in-front of you, you're too focussed, and tense.
I am a dressage trainer and general equestrian coach in Surrey, Sussex, and Berkshire. I teach dressage lessons, and hold a range of riding and equestrian clinics around the UK, and use my blog to share horse training tips, advice, and resources.