Video: Want to strengthen your abs? Try a plank By Mayo Clinic Staff Share Facebook Twitter Print details Isometric exercises like the front plank don't involve repeated movements. Instead, you assume a pose, contract your muscles and hold. That's why proper form is so important. Watch and learn how to set up and hold the front plank position on your knees and forearms. Try to hold it for at least 30 seconds. As your core gets stronger, challenge yourself to hold the pose for 60 seconds. With no equipment needed, the front plank is a great exercise to do at home or when you're on the road. Show transcript Want to strengthen your abs? Try a plank Knee and forearm plank A top move for building your core that's all about form. Lie on the floor facing the mat, knees bent and forearms flat. Rest your weight on your knees and forearms. Your elbows should be directly under your shoulders. Engage your core, keep a neutral spine and hold the position. Hold for 30 to 60 seconds. Repeat 2 to 3 times. Expert tips from the Wellness Physical Therapists at the Mayo Clinic Healthy Living Program. Get more healthy action tips delivered daily when you download the Mayo Clinic App. VID-20307379