A quad, or quadruple, is a figure skating jump with at least four (but fewer than five) revolutions. All quadruple jumps have four revolutions, except for the quadruple Axel, which has four and a half revolutions. No figure skater to date has landed the quadruple Axel in competition. The quadruple toe loop and quadruple Salchow are the two most commonly performed quads. Quadruple jumps have become increasingly common among World and Olympic level men's single skaters, to the point that not performing a quad in a program has come to be seen as a severe handicap. This phenomenon is often referred to as the "quad revolution". Since 2018, quadruple jumps have also become an increasingly common feature of women's skating, although they are not allowed under the ISU rules in the ladies' short pr