Conventional crunches. Try with your fists in your hips–that way you won’t use your arms to pull yourself up.
Ab circles–in the position of conventional crunches, but instead of just coming up straight, you go around in a circle–left for 30 then right for 30. Your shoulders should come off the ground, but be sure you don’t go up too high.
Oblique crunches (with knees to left then to the right). Try crunching totally sideways, then try crunching looking up at the ceiling. Amazing how a little difference in position will work muscles differently.
Cross crunches. This one, come all the way up and touch elbow to opposite knee. Also, do this one while bicycling your legs, so you bring your left knee in and twist your right elbow to it, etc.
Lower abs. Leg raises are good–don’t worry about bringing your legs all the way up, below 90 degrees is good. Do a few sets slowly then do some fast. Try doing leg raises and when your legs return to the bottom, split apart, then come back together and raise up again. Also, try brining your legs into your chest and shooting them back out.
Kneeling (don’t do this if you have bad knees or a bad back). Cross your arms across your chest, curve your back and touch your head to the floor then come up. DON’T use your hands or arms. If you can’t go all the way, go as far as you can until you build up to going all the way. Your back should be arched, but flat is one way to start out.
Also, try going into an iron bridge from standing and coming up again. This one, for beginners, is good to do near a wall. You climb down the wall with your hands into an iron bridge then climb back up it.
That’s just a few for now.
Robin
Surrender yourself to nature and be all that you are.