askthetrainer.com This is a great set to use if you are short on time and want to work your core, abs, shoulders, triceps, chest and obliques. Your core will never get a rest during this entire set. It is best to perform this with a BOSU ballast ball but a stability ball is okay if you are on a flat surface so the balls won’t roll away. Give this one a try and see how many times you can complete left and right arm medicine ball push-ups, stability crunches and plank. REMEMBER…. Stick to the basics. Start from a low level then advance. If you don’t do squats, bench press, pull ups lat pull downs, dumbbell rows, barbell rows, lunges, etc. you have absolutely no reason to do “cute” accessory exercises such as this one. Personal Trainer Michael Behnken, MS, NASM-CPT-PES, CSCS askthetrainer.com