Speed Analysis
The Speed Analysis tool provides a detailed breakdown of your speed data, including a speed curve showing your best average speed over various durations, and customizable best-effort intervals.
Overview
This analysis-only tool displays:
- Speed Curve - Best average speed achievable for each duration (logarithmic chart)
- Best Efforts - Your highest average speed for specific time intervals
- Summary Statistics - Max speed, average speed
Speed Curve
The speed curve chart shows your best average speed for durations ranging from 5 seconds to the full activity length. The X-axis uses a logarithmic scale for better visibility across short and long durations.
| Duration Range | Detail Level |
|---|---|
| 1-10 seconds | Every second |
| 10-60 seconds | Key intervals |
| 1-10 minutes | Every 30 seconds |
| 10-60 minutes | Every minute |
| 1-4 hours | Every 5 minutes |
Best Efforts
The best efforts section shows your highest average speed for user-selected durations.
Default Durations
- 5 seconds
- 10 seconds
- 30 seconds
- 1 minute
- 2 minutes
- 5 minutes
- 10 minutes
- 20 minutes
- 30 minutes
- 60 minutes
Custom Durations
Click "Edit Durations" to customize the intervals. Enter comma-separated values using formats like:
5s,30s,1m,5m,20m,1h
Custom durations are saved in your browser for future use.
Units
Speed is displayed in km/h. If your file stores speed in m/s (common in FIT files), it is automatically converted.
Summary Statistics
| Metric | Description |
|---|---|
| Max Speed | Highest speed recorded during the activity |
| Avg Speed | Average speed across the entire activity (excluding stops) |
Color Coding
Best effort bars are color-coded by relative intensity:
| Color | Intensity |
|---|---|
| Red | > 95% of max speed |
| Orange | 85-95% of max |
| Yellow | 75-85% of max |
| Green | < 75% of max |
Data Requirements
| Feature | Requires |
|---|---|
| Speed curve | Speed sensor data or GPS-derived speed |
| Best efforts | Speed + timestamp data |
Tips
- 5-second best speed indicates peak sprint speed
- Longer duration best speeds show sustained effort capability
- Compare speed curves across rides to track fitness or course difficulty
- Speed data from sensors is generally more accurate than GPS-derived speed