Running Dynamics & GCT Analyzer - Form Biomechanics
Benchmark your ground contact time (ms) and vertical bounce percentage against elite runners to improve running economy and prevent injury.
How to Use Running Dynamics in 3 Simple Steps
Step 1: Upload
Drag & drop your .FIT, .GPX, or .TCX activity file. All processing is 100% private in your browser.
Step 2: Process
FitCrop inspects telemetry streams, removes anomalies, recalibrates metrics, or fixes binary checksums.
Step 3: Export
Download your clean Strava, Garmin, and Zwift compatible file with 1 click. Zero server wait.
Frequently Asked Questions
What is an elite ground contact time (GCT)?
Elite distance runners typically spend under 208 milliseconds on the ground per stride. Advanced club runners average 210-240 ms, while recreational runners exceed 270 ms.
What is a good Vertical Ratio in running?
Vertical Ratio is vertical oscillation divided by stride length. A score under 6.5% indicates elite horizontal propulsion with minimal wasted energy bouncing up and down.