“Forearm planks activate your 360 core, firing up your transverse abdominis, rectus abdominis, and your obliques, along with your glutes and arms,” Amanda Quadrini, mbg staffer and certified yoga and Pilates instructor, previously shared. Another great thing about planks: There are so many different versions to choose from. We’ve pulled together 10 of the best plank variations—from classic to unique—demonstrated by our mbg moves spotlight trainers. Add any of these types to your fitness lineup, and get ready to reap all the muscle-engaging benefits.