Planks are a core strength exercise that involves maintaining a push-up position for as long as possible. V-sits are a gymnastics pose where the body forms a V-shape supported by the hands with legs raised in a pike position off the floor. Running provides various health benefits such as growing cartilage, sharpening hearing, saving skin, beating migraines, regenerating muscle, and easing anxiety. The Pacer Test is a maximal aerobic fitness test that progressively gets more difficult as time passes.