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APDS9960
Proximity + Light
Sport-Specific Performance Metrics
Distance Covered
Race-accurate distance tracking — 5K, 8K, and 10K event verification without GPS subscription
Elevation Gain
True course difficulty measurement — compare athlete fatigue across hilly vs. flat courses
Sprint Top Speed
Kick speed at the finish line — anaerobic reserve measurement for tactical coaching
Player Load
Cumulative biomechanical stress — the highest-load endurance metric in the HyperPulse suite
Effort / Work Rate
Sustained aerobic output — compare race pace to tempo and easy day effort levels
Heat Stress Index
Fall meet safety — automatic heat warning flags for coaches managing large teams
Sprint Count
Race tactics: early surges, hill attacks, and finishing kicks — competitive intelligence
Direction Changes
Course turns and trail switchbacks — technical course navigation analysis
■ FULL SENSOR READOUT
| Metric |
Source Sensor |
What It Tells You |
| Player Load |
LSM6DS3TR-C Accel |
Total mechanical work done |
| Sprint Count |
LSM6DS3TR-C Accel |
Explosive effort frequency |
| Sprint Top Speed |
LSM6DS3TR-C Accel+Gyro |
Peak velocity estimate |
| Jump Count |
LSM6DS3TR-C Accel |
Vertical effort frequency |
| Jump Height (cm) |
LSM6DS3TR-C Accel |
Vertical power output |
| Impact Events |
LSM6DS3TR-C Accel |
Contact load detection |
| Direction Changes |
LSM6DS3TR-C Accel+Gyro |
Agility / cut load |
| Rotation Speed (deg/s) |
LSM6DS3TR-C Gyro |
Rotational power |
| Effort / Work Rate % |
LSM6DS3TR-C Accel+Gyro |
Session intensity index |
| Distance (m) |
LSM6DS3TR-C Accel |
Estimated total movement |
| Temperature (°F) |
SHT31 |
Environmental heat load |
| Humidity % |
SHT31 |
Heat stress context |
| Altitude / Elevation (m) |
BMP280 |
Vertical displacement |
| Barometric Pressure |
BMP280 |
Environmental baseline |
| Compass Heading |
LIS3MDL Magnetometer |
Movement orientation |
| Ambient Light Level |
APDS9960 |
Indoor vs outdoor context |
| Worn Detection |
APDS9960 Proximity |
Auto session start/stop |
⚖ NFHS RULE STATUS
NFHS Cross Country Rule 3-2 covers competitor apparel/equipment. BLE-only, non-GPS sensors worn under clothing are reviewed case-by-case. Meet official approval required.