Long-arm ball crunch

1. Lie with your lower back supported on a stability ball, knees bent, with both feet firmly on the floor, and arms extended over your head.
   
   
2. Contract abs and lift your shoulders and upper back forward. Lower back to starting position and repeat.
   
   

Slow cycling

1. Lie on your back, keeping your right leg straight and a few inches off the floor, and left knee bent toward your chest. Clasp your hands behind your head, then rotating your torso so that your left elbow is pointing towards your right knee.
   
   
2. Slowly reverse arms and legs -- extending left leg, and bend your right knee toward chest, while pointing your right elbow toward your left knee. Pause, then repeat.