A basic plank is a great way to work your abs using only your body, but doing the same moves can get boring over time. This video is filled with plank variations that keep you engaged and will help you switch up your workout.
The video (warning: it will autoplay when you click the link below,) from Men's Health features over twenty types of plank exercises to choose from, so you can pick ones that are best for you and your strength level. If you have other parts of your body you want to work out at the same time, try the variations like the forearm to push up plank.
22 Plank Variations [Men's Health]