keep your anchor points the same and you will hit the same. if that means bending at the waist, then bend at the waist. just make sure your anchor points are the same...

and get out there and practice from your stand. practice sitting..practice standing...practice kneeling down as if you were walking to your stand and caught one walking towards you. i practice everything i can think of that might happen in the field. my mom thinks im sitting in a lawn chair and shooting because im lazy...i do it because it would be the same as sitting in my stand and shooting...i do it from the ground and the pool deck. always just maintain your anchor points and youll be good