Every measurement on this page is grounded in real recorded data.
What STRIV measures
See how pressure changes under each foot through a step.
Ground reaction force (GRF) is the force the ground exerts on you with each step.
Pronation excursion shows how far each foot rolls inward. Center of pressure traces pressure from heel to toe and side to side.
See both feet side by side across the same run.
Track shifts that a single post-run average can miss.
Pressure appears under the heel
PRESSURE THROUGH STEP- Landing · heel
- 64.7 / 61.1% L/R
- Midstance · left
- 51.2% medial · 48.8% lateral
- Midstance · right
- 48.1% medial · 51.9% lateral
- Push-off · forefoot
- 68.8 / 64.4% L/R
The left keeps more pressure at heel landing and forefoot push-off, while the right shifts slightly outward at midstance. The two feet follow distinct pressure paths through the same step.
A real pressure replay, slowed down so every phase of contact is visible.
Gold-standard validated.
Force-plate treadmills are the gold standard for measuring running forces in biomechanics labs. STRIV tracked the same changes as Bertec across ground reaction force (GRF), contact time, duty factor, vertical average loading rate (VALR), and loading time.
Validated over 40,000 steps · 23 runnersEach data point represents 15 steps per foot. The correlation value (r) shows how closely STRIV follows Bertec.
Choose a measurement to see how closely they move together.
Closer to r 1.00 means closer tracking.