The Axel jump or Axel Paulsen jump, named after its inventor, Norwegian figure skater Axel Paulsen, is an edge jump performed in figure skating. It is the sport's oldest and most difficult jump, and the only basic jump in competition with a forward take-off, which makes it the easiest to identify. A double or triple Axel is required in both the short program and the free skating segment for junior and senior single skaters in all events sanctioned by the International Skating Union (ISU).
