Slacklining

Slacklining is a dynamic sport centered on balance and physical control. It involves walking, running, or balancing on a length of flat webbing. This webbing is tensioned between two fixed anchors.

While it resembles tightrope walking, slacklining uses different materials and much lower tension. This lower tension creates a line that stretches and bounces. The line acts much like a long, narrow trampoline. To maintain stability, practitioners typically use their arms to balance when their center of mass shifts.

There are several distinct styles of slacklining. Tricklining is the most common form because the kits are easy to set up. It often takes place low to the ground. Practitioners perform various maneuvers ranging from basic walking and turns to advanced flips and twists. Intermediate tricks include the Buddha sit or surfing sideways. Advanced athletes may perform butt bounces or chest bounces.

Highlining is considered the pinnacle of the sport. This involves slacklining at a significant elevation above the ground or water. Highliners use redundant rigging to ensure safety. This typically includes a mainline of webbing and a backup webbing. They also use climbing ropes or ultra-high-molecular-weight polyethylene rope for extra security. Most highliners wear a climbing harness or a swami belt with a leash attached to the line.

Other specialized styles offer unique challenges. Rodeolining involves a piece of webbing draped with very little tension. This creates a slack line that can swing at large amplitudes. This style became popular in 1999 through students at Colby College in Maine. Urbanlining brings the sport to city streets and parks. Some practitioners engage in timelining, which focuses on endurance by staying on the line for as long as possible. Streetlining combines slacklining with street workout moves. This includes extreme maneuvers like the planche, front lever, or one-arm handstands.

The history of modern slacklining traces back to 1976. A rock climber named Adam Grosowsky is credited with its origins. Highlining was inspired by traditional highwire artists. The first documented highline walk was performed by Scott Balcom and Chris Carpenter. They used a nylon webbing line at The Arches in Pasadena, California. On July 13, 1985, Balcom successfully crossed the Lost Arrow Spire highline. In 2007, Libby Sauter became the first woman to cross that same location. The sport has reached mainstream attention through performances, such as Andy Lewis appearing in a 2012 Madonna halftime show.

Athletes have pushed the limits of the sport through incredible world records. In July 2021, four German athletes crossed a line suspended more than 1,000 meters high in Sweden. They completed the walk in 70 to 180 minutes. In 2006, Christian Schou set a record for the highest slackline at 1,000 meters in Norway. Some feats involve extreme sensory deprivation. In 2019, Friedi Kühne and Lukas Irmler walked a 975-meter-long line while blindfolded in Russia.

The longest free solo highline, meaning walking without a leash, was 110 meters long. This was completed by Friedi Kühne at the Verdon Gorge in France.

Despite the skill involved, the sport carries inherent risks. The International Slackline Association has tracked accidents since 2009. As of 2025, they have recorded 10 highline deaths and 3 trickline deaths. Other fatalities have occurred during longline or waterline activities. Safety is a major concern in highlining, where falling can be fatal. Some municipalities have even banned slacklining to protect trees and structures from damage. Highlines can also pose a hazard to low-level aviation.

Slacklining connects to various fields of physical discipline. It shares roots with circus skills and rock climbing. The sport requires intense focus on postural muscles and core strength. It also intersects with urban culture through streetlining. Whether practiced in a city park or on a mountain peak, it remains a test of human equilibrium and technical rigging skill.