Ground Contact Time
The length of time a foot stays in contact with the ground during each step of running or sprinting.
GCT stands for Ground Contact Time.
Definition
Ground contact time is how long the foot remains on the ground during the stance phase of each running step, usually measured in milliseconds. It is one of the most-studied running-form metrics because the ground is the only place a runner can apply force to move forward.
Faster running is generally associated with shorter ground contact times, as elite sprinters apply very large forces in brief windows, whereas endurance runners show longer contacts at slower paces. Ground contact time interacts with cadence and stride length and is described here purely as a performance metric, not a diagnostic or medical measure.
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Movement patterns
- AccelerationThe athletic pattern of building speed from a standing or slow start by driving large horizontal forces into the ground to project the body forward.
- BackpedalControlled backward locomotion performed while facing forward, staying low and pushing off the balls of the feet in short strides to stay reactive and keep play in view.
- Change of DirectionA planned redirection of the body from one movement vector to another, requiring an athlete to decelerate existing momentum and reaccelerate along a new line between two known points.
- CutA sharp, frequently reactive plant-and-redirect performed in a single decisive foot contact to evade an opponent or abruptly alter a line of travel.
- DecelerationThe athletic pattern of actively braking and absorbing momentum to slow or stop under control, producing eccentric forces that oppose the direction of travel.
Muscle groups
- CalvesThe muscles at the back of the lower leg that point the foot down and spring you off the ground with each step.
- QuadricepsThe large group of four muscles on the front of the thigh that straighten the knee and power running, jumping and squatting.
- HamstringsThe group of muscles along the back of the thigh that bend the knee and extend the hip to drive sprinting and jumping.
- Hip flexorsThe muscles at the front of the hip that lift the thigh toward the body, driving the knee up in running and kicking.
- Lower backThe muscles running along the base of the spine that keep the trunk upright and support bending and lifting.
Skills
- SprintingThe skill of running or riding at maximum controlled speed over a short distance.
- Running formThe skill of running with efficient, relaxed and balanced movement.
- FootworkThe skill of moving efficiently around the playing area to be in position for each shot or action.
- CatchingThe skill of cleanly securing a ball travelling through the air or off the ground.
- PacingThe skill of managing effort and speed so it lasts the whole distance or event.
Exercises
- Step-upA movement where you step up onto a raised platform one leg at a time and step back down.
- Side plankA core hold on one forearm and the side of the foot that targets the muscles along your side.
- High kneesA running-in-place cardio drill where you lift the knees high with a quick rhythm.
- Bulgarian split squatA single-leg squat where the back foot is raised on a bench behind you.
- Farmer’s carryA loaded carry where you walk while holding a heavy weight in each hand.
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- 2026-08-04
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