You have to make sure everything is still aligned. Like your string hand...so, you have to cant your string hand some way as to not put a Z torque on the string.
If you want to cant at the waist, no problem. I cant an bend at the waist...and I'm all comfy cozy doing so and don't really care 'how I look' ....and shoot my best that way(my back yard shot).
Maybe because my style is more of an athletic maneuver than a methodical process, so that's why I'm more in an athletic position.