EchoTrak™ Integrated Sprint Performance Report
John Alexander — 40-Yard Dash
John produces sufficient force to run fast, but TrackFIT Assessment data shows that his speed is limited by how force is transferred through his body, not by effort. Early in the sprint, force is converted efficiently into speed. Later in the run, rising impact forces at the feet disrupt timing up the chain, reducing the hands’ ability to steer and release power forward. This results in measurable speed loss despite continued effort.
Sprint phases identified
Where the run changes — and why the speed loss matters.
1–9
Acceleration
10–14
Max velocity
15–22
Speed loss
15
Speed loss starts
Practical takeaway
John does not need more effort. He needs cleaner force entry at the feet and better directional release of forces through the hands.
Request a Team TrackFIT AssessmentPhase breakdown
| Phase | Steps | Data behavior | Interpretation |
|---|---|---|---|
| Acceleration | 1–9 | Speed increases every step | Efficient force conversion |
| Max velocity | 10–14 | Speed peaks and flattens | Effort ≈ absorption |
| Deceleration | 15–22 | Speed declines each step | Impact exceeds effort |
Speed loss begins at step 15 (before fatigue would be expected), indicating a coordination and force-transfer issue.
One sentence summary
John’s feet start the absorption and transfer force and his hands finish it. When his feet leak power, his hands can’t steer it into speed—and John starts to leak speed late in his sprint.
EchoTrak™ interpretation
What changes will move the needle
Optimizing foot stability, lower-leg stiffness, and timing reduces braking, strengthens hand steering, extends acceleration, and delays late-run speed loss.
Step-by-step speed profile
Speed vs Step Number (mph)
Speed (mph)
Values displayed come from the report’s step-by-step mph table (22 steps).
| Step | Speed (mph) | Change from prior step (mph) |
|---|---|---|
| 1 | 4.1 | — |
| 2 | 7.2 | +3.1 |
| 3 | 10.9 | +3.7 |
| 4 | 13.4 | +2.5 |
| 5 | 15.2 | +1.8 |
| 6 | 16.8 | +1.6 |
| 7 | 18.0 | +1.2 |
| 8 | 19.1 | +1.1 |
| 9 | 20.0 | +0.9 |
| 10 | 20.6 | +0.6 |
| 11 | 21.1 | +0.5 |
| 12 | 21.3 | +0.2 |
| 13 | 21.5 | +0.2 |
| 14 | 21.6 | +0.1 |
| 15 | 21.5 | -0.1 |
| 16 | 21.3 | -0.2 |
| 17 | 21.2 | -0.1 |
| 18 | 21.0 | -0.2 |
| 19 | 20.7 | -0.3 |
| 20 | 20.2 | -0.5 |
| 21 | 19.5 | -0.7 |
| 22 | 18.6 | -0.9 |
On mobile: swipe left to view all columns.
Step timing & force overview (estimated)
Calibrated force labels
Effort force = Forward / Propulsive (lb). Impact force = Total load (lb). Ranges reflect realistic sprint loading bands by phase. Effort % of Total Load uses midpoints (effort mid ÷ impact mid).
Effort
Impact
| Step range | Avg step time (s) | Speed trend | Effort force (Forward / Propulsive, lb) | Impact force (Total load, lb) | Effort % of Total Load |
|---|
Hands–feet force transfer (data interpretation)
Late in the sprint, impact can rise while propulsive effort falls. That pattern matches John’s speed loss: load increases at contact, but less of that load is redirected forward into speed.
Visual pattern
Steps 1–9 show strong conversion (speed rising fast). Steps 10–14 flatten (maintenance). Steps 15–22 show steady decline while impact can remain high.
Motion DNA™ score expectations
As effort-to-impact ratio drops late, Motion DNA™ typically shows reduced transfer efficiency through the chain. Stabilizing foot contact timing and keeping effort steadier later usually raises consistency and reduces late speed loss.
58.2
Typical HS band ~57–59
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