Linear Sprint Metrics
What each linear sprint metric means and how the 1080 software calculates it.
A linear sprint is a single run in one direction. This article describes the metrics the 1080 software calculates for each run. All metrics are calculated from the whole run.
| Metric | Short label | Unit |
|---|---|---|
| Top Speed | Top Speed | m/s, km/h, or mph |
| Total Time | Tot Time | s |
| 0-5 m (or 0-5 yd) | 0-5 | s |
| Max Acceleration | Max Accel | m/s² |
| Max Deceleration | Max Decel | m/s² |
| Acceleration Time | Accel Time | s |
| Acceleration Distance | Accel Dist | m or yd |
| Deceleration Time | Decel Time | s |
| Deceleration Distance | Decel Dist | m or yd |
| Total Distance | Tot Dist | m or yd |
The filtered speed curve
Several metrics are calculated from a filtered speed curve rather than from the raw speed samples. The raw speed of a sprint rises and falls with every step and is affected by line sway. To find the athlete's real speed profile, the software applies a low-pass filter that removes the step-by-step variation and leaves a smooth curve. See Sample Filtering for an illustration.
Definitions
Total Time — The time from the start of the run to the end of the recording.
Top Speed — The highest value of the filtered speed curve. Because the curve is filtered, Top Speed reflects the athlete's sustained speed rather than the brief peak within a single step. It is therefore usually lower than the highest raw speed sample.
0-5 m (0-5 yd) — The time taken to cover the first 5 meters (or 5 yards) of the run. If the run is shorter than that distance, the value is 0.
Max Acceleration — The largest increase in filtered speed over any 0.5-second window, divided by the window length. Measuring over a window rather than between single samples gives a stable value that is not affected by individual steps. See Measuring Acceleration for how it compares with the 0-5 time.
Max Deceleration — The largest decrease in filtered speed over any 0.5-second window, divided by the window length. It is shown as a positive number.
Acceleration Time — The time from the start of the run until Top Speed is reached.
Acceleration Distance — The distance from the start of the run to the point where Top Speed is reached.
Deceleration Time — The time from reaching Top Speed until the athlete stops.
Deceleration Distance — The distance covered from reaching Top Speed until the athlete stops.
Total Distance — The distance covered during the whole run.
Deceleration metrics need a full stop
Max Deceleration, Deceleration Time, and Deceleration Distance are only calculated when the run ends with the athlete close to standstill (below 0.5 m/s). If the recording stops while the athlete is still running, these metrics are 0.
Targets and best values
For Total Time, 0-5, Acceleration Time, and Deceleration Time, a lower value is better. For all other linear sprint metrics, a higher value is better. This decides whether a result meets its target and which run counts as the best.