Plank exercise helps in making abs and back very strong. It also helps you in gaining the maximum benefit from push-ups. This isometric exercise requires you to maintain position, which can be very difficult. People do many types of plank including side, front and reverse plank. Sportsperson and boxers do this exercise during their training. It is also done by people who want to do heavy weight exercise. Plank makes your arms and shoulders strong. It is important to learn the right way of doing this exercise and we will explain it here. Following is a detailed guide on how to do the perfect plank.