There are many abdominal excercises that wouldnt, but the basic sit-up will probably put some pressure on. Try using one of those excercise balls to cushion the area
Have you see the big rubber inflatable balls that gyms have?
You would be able to replicate the sit-up movement on the ball and take pressure off the cocccyx
oooohhhh I get it! Duh! Yeah, I knew the type of ball you meant, I think I have one somewhere but I couldn't understand how you would use it for sit ups. Now I do. Ta!
And you can do it standing up ... put your arms out in front of you, and try to touch your left elbow with your right knee, and then alternate legs. This also works your butt because the "cheek" on your "down leg" has to hold the centre of your body stable. It's a good exercise for a butt pump.
Hi..The best place to do sit ups is on a bed...when you are doing them on solid floor..you use 60% of your back muscles...on a bed you use 65% abdominals...