If you are working on the idea of “bringing your hips towards your hands” as a position correction for collapsing or letting your seat fall out behind the motion, think instead of bringing your side belt loops (the ones over your pockets, just in front of your hip bones) towards your hands. This will prevent twisting, arching your back or pulling your stomach in, and foster an upright upper body without stiffness.
About the author
TarrSteps is a Citizen of the World (aka Canadian) currently working with young horses and "problem solving" - for both horse and riders - in the Surrey area. She has dabbled in most horsey disciplines but loves eventing because there is always another question to ask and another answer to find.