my fave ab exercise: on the decline bench holding a plate/DB on my chest. u could increase the angle by propping the foot end of the bench. this is REALLY effective.
my fave ab exercise: on the decline bench holding a plate/DB on my chest. u could increase the angle by propping the foot end of the bench. this is REALLY effective.
One has to be careful when doing flexion exercises, especially weighted. The lumbar spine is exposed to high levels of stress, and one mishap and you're going to screw yourself. The abs don't need to be trained dynamically. Isometric abdominal work (i.e., bridges/jack knives/planks and side bridges) is probably the best.
Doing crunches with weight on a swiss ball is acceptable, but you should only come up to a point where you have a neutral spine. Try to avoid rounding forward.
For those that will say dynamic ab work is needed in case your form slips with squats or deadlifts, I say this: train with exercises that better help you recover from such a position. Why do you think WSB utilizes good morning sso much? Fail on your squat by slipping forward a bit, and the practice of GMs will certainly reduce your risk of injury to the lumbar spine.