If you’re looking for a very advanced trunk challenge, try this one. Assume the hollow position with a single kettlebell resting on your chest. Grab the kettlebell by the body and press upward and over your head, but make sure to stop with the kettlebell slightly past your forehead. At this point, only flex at the elbow and perform an overhead triceps extension and then proceed to pulling the kettlebell back to the starting position, then repeat.
Remember, you have to do this all the while maintaining trunk stability and the hollow position.
Watch Coach Brandon, start light, and do it right!