Exercise level: Advanced

Exercise description: Get into a plank position with your toes on one bosu and your forearms on another bosu. Make sure your back is neutral and your shoulders are positioned straight above your elbows. Keep your pelvis neutral as you place your right hand and then your left hand on the bosu. Once both arms are straight, hold for two seconds and then slowly bend one arm at a time to lower yourself down to your starting position. Do six reps in total, and make sure you alternate which arm you are initiating the movement with.
Note: to make this easier take your feet off of the bosu. If you want to make it even easier, perform the exercise from your knees.