BASE jumping grew out of skydiving. BASE jumps are generally made from much lower altitudes than skydives, and a BASE jump takes place close to the object serving as the jump platform.
Snowboards are boards where both feet are secured to the same board, which are wider than skis, with the ability to glide on snow.
Since the development of the sport in the 1970s many new subtypes of mountain biking have developed, such as cross-country (XC), all-day endurance, freeride, downhill, and a variety of track and slalom types.
BMX Freestyle is now one of the staple events at the annual Summer X Games Extreme Sports competition and the ETNIES backyard jam, held largely on both coasts of the United States.
Ski jumping has been included at the Winter Olympics since 1924 and at the FIS Nordic World Ski Championships since 1925.
Men perform 4 dives from a height ranging from 26–28m. There are a total of nine groups (front, back, reverse, inward, front twists, back twists, reverse twists, inward twists and all armstand dives).
Wakeboarding is a surface water sport which involves riding a wakeboard over the surface of a body of water. The wakeboard is a small, mostly rectangular, thin board with very little displacement and shoe-like bindings mounted to it. It was developed from a combination of water skiing, snowboarding, and surfing techniques.
A skateboard is a type of sports equipment used primarily for the sport of skateboarding. It usually consists of a specially designed maplewood board combined with a polyurethane coating used for making smoother slides and stronger durability. Most skateboards are made with 7 plies of this wood.
Freestyle motocross (also known as FMX) is a variation on the sport of motocross in which motorcycle riders attempt to impress judges with jumps and stunts.
The two main types of freestyle events are: Big Air and Freestyle motocross.
Surf is the wave activity in the area between the shoreline and outer limit of breakers. It may refer to a breaking wave in shallow water, upon the shore, or in the area in which waves break.
Freeride ski performed on natural, un-groomed terrain, without a set course, goals or rules. It evolved throughout the sport’s formative early years as a contrary response to the highly regimented style of ski competition prevalent at the time.
On water, a kiteboard, similar to a wakeboard or a small surfboard, with or without footstraps or bindings, is used. Kitesurfing is a style of kiteboarding specific to wave riding, which uses standard surfboards or boards shaped specifically for the purpose.