Compression

In bouldering, "compression" refers to a climbing technique where the climber uses opposing forces to hold onto and move between two features, typically on either side of the body. The climber creates pressure by pushing and squeezing with their hands and feet against holds positioned opposite each other. This technique is often used on overhanging routes or when climbing features like aretes and volumes.

Examples

When a climber uses "compression," they push in opposite directions to stay on the rock. For example, imagine Kate climbing a route with a boulder that has two opposing sides. She places her left hand on one side and her right hand on the opposite. She pushes outward with both hands and presses her body between them to move up. Another situation is when James encounters a wide, vertical feature with holds on each side. He pushes his hands out against these features and uses his feet to balance and move upwards. This technique requires significant body tension and strength to maintain the position and advance.