Staying immobile not best for injuries
Statesman Journal
Instead, get on a stability ball to do crunches, do planks to strengthen stabilization muscles or try Pilates moves that will strengthen your transverse

Visit link:
Staying immobile not best for injuries – Statesman Journal

If you’re tired of the same old crunches, here’s a great exercise for the abdominal muscles that’s quite challenging. As with other Pilates exercises, it will strengthen your core area. This exercise also will build arm muscles, although you can do it without dumbbells if it’s too difficult.

Follow this link:
Teaser hold with arm exercises (Lansing State Journal)

If you’re tired of the same old crunches, here’s a great exercise for the abdominal muscles that’s quite challenging. As with other Pilates exercises, it will strengthen your core area. This exercise also will build arm muscles, although you can do it without dumbbells if it’s too difficult.

Go here to read the rest:
Teaser hold with arm exercises (Lansing State Journal)