How to Do a knee plank Knee plank is a great way to tone your abs, legs and arms. But, if you are not doing it correctly, then you are not getting the most out of the exercise. Here’s how to properly do a knee plank, so you can start seeing results. Get into a push-up position, but bend your knees and keep your weight on your forearms instead of your hands. Keeping your back straight, tighten your abs and glutes and hold for 30 to 60 seconds. Knee Plank Assuming you’re already in a plank position, lower your knees to the floor so they rest on the mat. Make…