Planks are Babidiye’s favorite abs exercise. There are many versions to match every person’s fitness level. The farther away you are from the center of the body, the more muscles you’re recruiting, making the move more difficult, she adds. Planks are great because they use your own bodyweight to maintain the stability of your entire core, which is exactly what the core muscles are supposed to do, and prevent back pain. Add leg movements to make a plank even more challenging, Babidiye adds.