Every measurement on this page is grounded in real recorded data.
What STRIV measures
See how pressure changes under each foot through a step.
Metrics we use: Time to forefoot peak · Pressure through landing, midstance and push-off
Ground reaction force (GRF) is the force the ground exerts on you with each step.
Metrics we use: Peak vertical GRF · Estimated VALR · Loading time
Pronation excursion shows how far each foot rolls inward. Center of pressure traces pressure from heel to toe and side to side.
Metrics we use: Pronation excursion · Center of pressure trajectory
See both feet side by side across the same run.
Metrics we use: Left / right: Contact time · Force · Pronation · Forefoot timing + more
Track shifts that a single post-run average can miss.
Metrics we use: Loading time · Peak vertical GRF
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.
Peak vertical GRF
Understand the measurements
Four focused guides to pressure, impact, pronation and gait analysis—what each measurement shows, what changes it and what it cannot conclude alone.
Foot pressure
See where each foot lands, how load travels through stance, and what changes from left to right.
Read the guide 02Impact force
Read the shape of every landing—from peak force to how quickly the load arrives.
Read the guide 03Pronation
See how each foot rolls, adapts, and transfers load from landing to push-off.
Read the guide 04Gait analysis
Turn thousands of steps into a clear story of timing, movement, load, and left–right balance.
Read the guide