Optical HR Cadence Lock Detector - Clean Glitched Pulse Telemetry
Did your watch optical heart rate spike to 180 bpm and match your step cadence? Detect cadence lock glitches and interpolate clean aerobic pulse data.
How to Use Cadence Lock Fix 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 cadence lock on Garmin and Apple Watch?
Cadence lock occurs when the optical heart rate sensor confuses the rhythmic shock of footstrikes with the pulse of blood flow, causing recorded heart rate to equal step cadence (e.g. 175 bpm).
How does FitCrop fix cadence lock?
FitCrop analyzes where HR and SPM match within ±3 bpm without pace acceleration, and re-interpolates the pulse curve between genuine physiological baselines.