Quadrupedal movement, moving on all four limbs, is widely used in parkour as both a conditioning exercise and a practical technique for movement. The most basic form of quadrupedal movement is the reciprocating, forward-moving variation. Like all quadrupedal movement, this technique is a great full body exercise and it develops coordination and weight transferring skills needed for other movements. In parkour, quadrupedal movement is useful as a means to get under or through small spaces, navigate across irregular surfaces, or provide extra security and stabilization when moving at heights.