Fitness Level Timeline
Log VO2 Max to InfluxDB each time it updates and chart your aerobic fitness improvement over a full year.
How much oxygen your body can use during hard exercise. It is one of the best measures of cardiovascular fitness.
How much oxygen your body can use during hard exercise. It is one of the best measures of cardiovascular fitness.
Unit: mL / kg / min
VO2 Max improves slowly with training — tracking it month over month shows whether your cardio program is working.
HC Webhook sends vo2 max readings to any webhook — here are ideas to get you started.
Log VO2 Max to InfluxDB each time it updates and chart your aerobic fitness improvement over a full year.
Send a monthly email showing your VO2 Max change and what fitness category you fall into.
Send a Slack or Telegram message when your VO2 Max crosses a new personal best.
Use your VO2 Max in an n8n formula to calculate your heart rate training zones and update them automatically.
Chart VO2 Max alongside resting heart rate and HRV for a complete cardiovascular health view.
Compare VO2 Max across seasons to see how summer base training affects winter race fitness.
HC Webhook posts a JSON object containing a vo2_max array to your endpoint on every sync.
{
"timestamp": "2026-04-15T07:00:00Z",
"vo2_max": [
{ "ml_per_kg_per_min": 48.5, "time": "2026-04-15T07:00:00Z" }
]
}Google Health Connect stores your vo2 max data from compatible apps (Samsung Health, Fitbit, Garmin, and more). HC Webhook reads that data on a schedule you set and forwards it as JSON to any URL you add — n8n, Home Assistant, Zapier, or your own API.
Install HC Webhook and grant Health Connect permission for VO2 Max.
Paste your webhook URL — Home Assistant, n8n, Zapier, or any endpoint.
Set your sync schedule. VO2 Max readings arrive automatically, every time.
Steps
Your total step count for the day, recorded by your phone or wearable.
Learn moreSleep
How long you slept and your sleep stages — light, deep, and REM — from the night before.
Learn moreHeart Rate
Your heart rate readings taken throughout the day by your phone or wearable.
Learn moreHeart Rate Variability
How much time varies between your heartbeats. Higher HRV generally means better recovery and lower stress.
Learn moreFree Android app. No account required. Data stays on your device.