In gymnastics, tumbling, also known as power tumbling, is an acrobatic sporting discipline which combines some of the skills of artistic gymnastics on the floor with those of trampolining. It is practiced on a 25-meter-long spring track sometimes. It was developed from tumbling performances performed by entertainers from very early times but as a sport is now codified, regulated, judged, and performed using standardized special acrobatic equipment.
This sport is practiced by both men and women. Competitors perform two passes, each containing eight skills along the track, usually starting with a Round-off, Barani, or Rudi (the Barani and Rudi are forward, twisting somersaults) followed by a series of back-handsprings and/or whips (a fast, long back somersault done in a straight body position) ending in a 'dismount' skill. Only the feet and hands are allowed to make contact with the track.
Governed by rules established by the Fédération Internationale de Gymnastique (FIG), tumbling is one of the gymnastic disciplines. Many elements of tumbling are also practiced on Floor Exercise by participants of both Women's Artistic Gymnastics (WAG) and Men's Artistic Gymnastics (MAG). Tumbling elements such as the round-off and back-handspring (flic) are commonly integrated into the balance beam routines of gymnasts.
Tumbling has been an Olympic gymnastics event only once, at the 1932 Summer Olympics, and was a demonstration event in 1996 and 2000. It is one of the events of the World Games. There is an annual World Championships held in conjunction with the Trampoline World Championships.
When power tumbling was first started, and for the first ever US National Championships in Tumbling in 1886, gymnasts would perform their skills on thin mats only. From there, "floors" evolved in a wide variety of ways, including rows of skis tied together with the ends cut off under those mats, and then to the rod floor used today. This was developed by Randy Mulkey, which is a 25 metres (82 ft) long by 2-metre (6.6 ft) wide track consisting of fiberglass rods (laid horizontally, to make it springy) under two layers of foam mats. It also includes a 10 metres (33 ft) run up at the front. At the end is a mat where the gymnasts land their dismounting skill.