The plank (also called a front hold, hover, or abdominal bridge) is an isometric core strength exercise that involves maintaining a position similar to a push-up for the maximum possible time. The plank is a classic exercise that strengthens your body from head to toe. In particular, the plank helps strengthen your core muscles, including your abdominals and lower back. Having a strong core is linked to reduced lower back pain, an improved ability to perform daily tasks, and enhanced athletic performance. https://youtu.be/ASdvN_XEl_c http://adfoc.us/71178581380492 http://adfoc.us/71178581380516 http://adfoc.us/71178581380526 http://adfoc.us/71178581380538 http://adfoc.us/71178581380542