How to Stay Off the Ground

Why Ground Contact Time Matters for Speed and Explosiveness

When athletes think about getting faster or jumping higher, they usually focus on one thing: how hard they push.

But there’s another factor that separates elite athletes from everyone else:

How long their foot stays on the ground.

This is called Ground Contact Time (GCT).

Understanding and improving ground contact time can dramatically improve sprint speed, explosiveness, and overall athletic performance.

What Is Ground Contact Time?

Ground contact time is the amount of time an athlete’s foot stays on the ground during movement.

Every step during a sprint, jump, or change of direction involves a brief moment where the athlete applies force into the ground.

That force is what propels the athlete forward or upward.

The key is simple:

The faster an athlete can apply force and leave the ground, the more explosive they become.

Elite sprinters often have ground contact times under 0.10 seconds during top speed sprinting.

That’s less time than it takes to blink.

Why Less Time on the Ground Matters

Speed in sports isn’t just about strength.

It’s about how quickly an athlete can produce force.

Imagine two athletes pushing off the ground with the same amount of force.

• Athlete A pushes for 0.25 seconds

• Athlete B pushes for 0.12 seconds

Athlete B is producing force twice as fast.

That faster force production leads to:

• quicker acceleration

• faster sprinting

• more explosive jumps

This is why elite athletes look like they are bouncing off the ground rather than grinding through each step.

The Role of Elastic Energy

Ground contact time is closely tied to something called the stretch-shortening cycle.

When an athlete lands, their muscles and tendons store elastic energy like a stretched rubber band.

If the athlete quickly reverses that motion and pushes off the ground, that stored energy contributes to explosive power.

But if the athlete stays on the ground too long, that stored energy dissipates.

Think of it like bouncing a rubber ball:

• Quick bounce = energy returns immediately

• Slow bounce = energy disappears

Elite athletes use the ground like a springboard, not a cushion.

How We Measure Ground Contact Time

At TitanForge, we measure ground contact time using two primary tools.

Sprint Testing

When athletes sprint, we record their movement using high-speed video and sprint tracking systems.

This allows us to measure:

• stride length

• stride frequency

• ground contact time during each step

This helps identify whether an athlete is producing force quickly enough during sprinting.

Force Deck Testing

We also use force decks to measure how athletes apply force during explosive movements like jumps.

Force decks measure:

• ground contact time

• force production

• power output

• left/right asymmetries

One common test we use is the Countermovement Jump (CMJ).

This test reveals how quickly an athlete can transition from landing to takeoff, which directly reflects ground contact time and explosiveness.

What Slower Ground Contact Time Can Indicate

Longer ground contact times often reveal issues such as:

• inefficient sprint mechanics

• limited explosive strength

• poor elastic energy utilization

• fatigue or asymmetry between legs

Identifying these issues allows us to design targeted training programs that improve an athlete’s explosiveness and movement efficiency.

Training to Improve Ground Contact Time

Improving ground contact time requires training the body to produce force quickly, not just produce force.

Effective methods include:

• plyometric training

• sprint mechanics drills

• reactive jumps

• acceleration training

• strength training focused on rate of force development

These methods help athletes learn to apply force rapidly and leave the ground faster.

The Takeaway

Explosive athletes aren’t just stronger.

They are faster at producing force.

Ground contact time is one of the clearest indicators of explosiveness in sports.

The less time an athlete spends on the ground, the more efficiently they are transferring force into movement.

That’s why with TitanForge, we measure and track ground contact time during our sprint testing and force deck assessments.

Because when athletes learn to apply force faster, they move faster.