Lap and section review
Compare the same course positions across laps, identify the fastest sections, and see where each lap gained or lost time.
Cyclocross race analysis for every lap.
Lap Track turns FIT, GPX, and TCX activity files into a focused cyclocross race analysis workspace. Compare laps and sectors, find where time was lost, and understand how power, cadence, heart rate, speed, grade, and elevation shaped your ride.
Open Lap Track
Race analysis features
Built for repeated comparison after training and racing.
Sectors across every lap
Compare six consistent course-location sectors across laps. Select a sector from the review bar or selector to highlight its grouped map ranges.
Power and quadrant analysis
Explore power zones, variability index, efficiency factor, and cadence-versus-power quadrants using FTP and a 90 rpm boundary.
Interactive course maps
Color the course by power, heart rate, speed, cadence, grade, elevation, sections, or race performance with playback and grayscale elevation relief.
Performance charts
Inspect highlighted datapoints with reference lines for FTP, threshold heart rate, and 90 rpm across the relevant charts.
AI coaching prompt
Copy a structured prompt containing race metrics, lap comparisons, sections, sectors, zones, elevation, and temperature data when recorded for an AI coaching summary.
Local-first file analysis
Choose a FIT, GPX, or TCX file and analyze it directly in the browser. Your local file remains in your browser.
Race-window detection
Separate the sustained race effort from warm-up, cooldown, and extra recording before refining the detected start, finish, and lap boundaries.
How Lap Track works
1. Load activity data
Open the app and choose an exported FIT, GPX, or TCX activity file.
2. Inspect the race
Review the detected race window, laps, sectors, course sections, maps, charts, zones, and pacing patterns.
3. Find the next gain
Use lap, sector, and section comparisons to focus training on the places that cost the most time, then copy the analysis prompt for an AI-assisted summary.