Name: TrainIQ Field — Wind Pace · Load · AQI
Author: Taehoon

TrainIQ Field shows the four metrics that matter most during a run — all on one screen.

ROW 1 — TRUE PACE
Wind-adjusted pace calculated in real time from GPS speed and current weather data. Headwind slows you down; tailwind speeds you up. TRUE PACE reflects the actual effort behind your speed.
Wind-corrected pace calculated in real time. Into a headwind your pace reads slower than GPS speed; with a tailwind it reads faster. TRUE PACE reflects how hard you are actually working — the effort behind the number.

ROW 2 — LOAD · EFF · INT
- LOAD (Training Stress Score): Cumulative fatigue for this session. A 60-minute run at LTHR intensity = 100 pts. Tracks how hard you've worked.
- EFF (Efficiency Factor): Pace relative to heart rate. A rising EFF over weeks means your aerobic fitness is improving.
- INT (Intensity Factor): Current average HR ÷ LTHR. Below 0.75 = easy; 0.85 = moderate; 1.0+ = at or above threshold.

ROW 3 — AQI · HR · HRZ
- AQI: Live air quality index from OpenWeatherMap. Know before you push hard outdoors.
- HR: Current heart rate in bpm.
- HRZ: Heart rate zone based on LTHR (Friel 5-Zone: Z1 Recovery → Z5 Max).

ROW 4 — WIND
Wind direction, speed (m/s), and raw GPS pace. See exactly what the wind is doing to your run.

SETTINGS
- LTHR: Set your Lactate Threshold Heart Rate. All zones, IF, and LOAD are calculated from this single anchor.
- Color theme: 30 value-text color options.

Requires an OpenWeatherMap API key for AQI and wind data (free tier sufficient).