Hello everyone! Has anyone got any good adjustments to share for crunches lying on your back. My lower back is quite stiff so I can’t get a good core connection when doing crunches with ball behind my belly button (my back arches straight away) and my shoulders hunch if I roll the ball more between shoulder blades. I am not sure how to progress this one. Would appreciate any thoughts and advice ❤️ Have a great Tuesday everyone!!!