An Amazing exercise if done “right” – Unfortunately one of the most abused exercises i see taught by P.T.S and physios alike. I even heard last week a phsyio saying it was a butt exercise – pleassssseee pick carefully who and where you train. The Swiss Ball fwd Ball roll should be done starting in a box position with the elbows only on ball – legs hip width apart and feet remain on floor. As in the picture when you roll forward (with an exhale- essential ) the hips and shoulders move simultaneously maintaining the line of the spine as in the pic from head to butt with the energy and work in the TVA maintaining the shoulders down in back pockets and not elevating – your energy is the lower abdominals doing the work and the shoulders been stabilised with an exhale out and inhale back – you should feel a gripping in the lower abdominals like a brace – repeat 10x and if you want to bring in more obliques then roll from side to side using same technique. Enjoy and remember every repitition is a repitition of skill or repitition of injury.