Sidesurf is the term given to inline skaters who skate by placing their heels facing each other but separated by roughly shoulder width. In the sidesurf position, a straight line can be drawn through both heels and toes with the toes pointing away from each other. The motion is similar to being on a snow board however the toes are both turned outwards. Another term used for sidesurfing is "crabbing," as this is similar to the perpendicular style in which a crab moves
Sidesurfing is normally done while skating down hills, just like snowboarding, because gravity naturally accelerates the skater. However, sidesurfers can learn to propel themselves forwards by rotating their hips from side to side while pushing their skates perpendicular to their direction of motion. Initially, sidesurfing is quite hard, and a lot of practice is required.