后内跳，也称后内结环跳，即Salchow jump，是花样滑冰业余比赛的六种常见跳跃中技术难度第二低的跳跃。在花样滑冰界，Salchow jump常简写为Salchow或字母S。

对逆时针旋转的运动员而言，后内跳，起跳时向后滑行，用左足后内刃起跳，右足刀齿不点冰，旋转360度后，用右足后外刃落冰，左足不接触冰面，并向后滑行。

对顺时针旋转的运动员而言，后内跳，起跳时向后滑行，用右足后内刃起跳，左足刀齿不点冰，旋转360度后，用左足后外刃落冰，右足不接触冰面，并向后滑行。

后内跳既可作为单跳，又可作为联合跳跃中的第一跳，或连续跳跃中的某个跳。

The Salchow is a figure skating jump with a takeoff from a back inside edge of one foot. The rotation in the air is made in the direction of the curve of the take-off edge. The landing is made on the back outside edge of the foot opposite the one used for take-off. One or more rotations may be made in the air. It was invented by the Swedish skater Ulrich Salchow in 1909.