Does sitting trot mean loose hips?
Of course your hips are loose, I hope. What's happening with your upper body; your shoulders and collarbones? I have been discovering that if the upper body is toned, the lower takes care of itself. So, sit upright but dont' pullyourself out of the saddle in an attempt to be "taller", just sit naturally upright. Let your arms hang down by your sides (your horse is patiently standing while you do this, right?). Your palm will hang facing backward. Now, without doing anything else, roll your palms so that the face Forward. Pause, now keeping a bend in your elbows, bring your hands into "holding reins" positions . Don't let your shoulders roll forward. They should be open and you should feel a bit of "pull" or positive tension across the collarbone, centered at your sternum. It's that "proud" feeling, but NOT the "snooty" posture of falsely raising the sternun. NOW, here's the kicker, LOWER your elbows, (NOT YOUR ARMS) they will be parallel to the ground. Just think "lower my elbows down OVER my hips" They won't actually move that far, but the feeling is to seat yourself firmly over and around your pelvis. This is a very strong position. NOw , as you ride the sitting trot, every time your go to thinking about your hips and making THEM loose, forget that and thing about making your shoulders FIRM. ONE MORE THING and this is important. Once your sholders are in the above explained position, you must gently squeeze your armpit muscles to tack your upper arm to your body. Do this during the half halt or any transition . Just keep focussing on firm upper body, open shoulder and elbow down, tight muscle just behind the armpit (like you were trying to keep a million dollar bill that is tucked under your armpit from falling out).
Also, instead of tightening the core muscles like you are trying to STOP a bowel movement from happening. Push outward with your core muscles as if you are trying MAKE a BM happen.
I would love to hear what you feel when you try the shoulder thing. Practice the steps while on the ground (the rolling the palm., bending the elbow and dropping the elbow downward)
By the way, I do not think your question is silly in the least. I know exactly what you are trying to say!!
Caroline aka Tinyliny