Planks are an awesome core exercise if you don’t make these common mistakes! Planks allow you to keep your spine safe, unlike sit-ups and crunches. This video will ensure that you know how to plank the correct way to get the most out of your workout. Is holding a plank boring or too easy for you? Two of our favorite variations are shown toward the end of the video. Make sure you can at least hold the plank for more than 30 seconds before progressing yourself.