The king of core exercises… the plank! How it works: Check out the video for more detailed tips on how to do it properly and get more out of the exercise. You've got this! Looking for a personal trainer in the Chesterfield area? Check us out at Blue Ocean Fitness on Facebook and Instagram, or give us a call! #Techniquetip #Blueoceanfitness #strengthtraining #personaltrainer #ChesterfieldMO