Verve: MET Fitness Tracker

Verve — Cardiorespiratory Fitness & Longevity Tracker

Verve tracks the metric that predicts mortality better than almost any other: your cardiorespiratory fitness (CRF) in METs, validated against 122,000 patients in the Cleveland Clinic study.

What Verve measures

Weekly MET-hours — the primary output of every fitness session
Zone 2 minutes — the aerobic work that moves your CRF
Strength training minutes — independently linked to 23% lower all-cause mortality (UK Biobank, 70,000+)
Daily step count and cadence
CRF performance tier vs your age and sex (Cleveland Clinic / ACSM norms)
Resting heart rate trend
Metabolic health markers: glucose, blood pressure (28-day avg from Apple Health), triglycerides, HDL, waist
Muscle health: grip strength, body fat %, skeletal muscle %, FFMI
AI Coach
Every month, your AI Coach synthesises your activity, body composition, and CRF history into a two-sentence narrative and one focused recommendation — telling you what you achieved and exactly what to do next.

CRF Testing — 6 clinical methods
Manual entry · Bruce Protocol · 6-Minute Walk · HR Ratio (Uth-Sørensen) · Wearable VO₂Max import · Treadmill test

Apple Health integration
Syncs workouts, resting HR, VO₂Max, weight, steps, and now blood pressure from any wearable connected to Apple Health. Background movement estimated via Nakanishi (2021) model.

Not a medical device. Not FDA approved. Not medical advice.