The plank is one of the most effective exercises for core conditioning. It is performed by holding a push-up-like position, with the body’s weight being supported by the elbows, forearms, and toes. Holding this static position increases the muscular endurance and strength of an athlete’s entire core, encompassing all of the muscles within the trunk, from the pelvic girdle to the shoulder girdle. These muscles include the spinal erectors, abdominals, glutes, hamstrings, and shoulders. For people who have disk problems or back pain, the plank is a good alternative to crunches because it does not require any spinal flexion or extension. The plank promotes proper posture and keeps the vertebrae and ligaments of the spine aligned, reducing back pain.