[2] When executing a split, the lines defined by the inner thighs of the legs form an angle of approximately 180 degrees.This large angle significantly stretches, and thus demonstrates excellent flexibility of, the hamstring and iliopsoas muscles.Consequently, splits are often used as a stretching exercise to warm up and enhance the flexibility of leg muscles.Another common problem encountered during splits (both front and side) is pain in the knees.Because of this widespread view, splits appear in slapstick comedy, schadenfreude, and other forms of entertainment.