# find vo2 max on apple watch — Wearable Metrics Explained > Updated: 2026-05-20 · Source: https://dorsi.ai/topics/find-vo2-max-on-apple-watch Your Apple Watch measures VO2 max during outdoor walks and runs. It’s a key indicator of cardiovascular fitness, but as we discussed in our look at three… Your Apple Watch calculates VO2 max during outdoor walks, runs, or hikes that are at least 20 minutes long. Open the Health app on your iPhone, tap Browse at the bottom, then tap Heart. Scroll to Cardio Fitness — that's your VO2 max. I check mine monthly because a sudden drop can signal overtraining or health changes. On this page, I'll explain what the number means and how to improve it through smarter workouts. Your Apple Watch measures VO2 max during outdoor walks and runs. It’s a key indicator of cardiovascular fitness, but as we discussed in our look at three Apple Watch numbers that should change how you train, the raw value needs context. To find yours, open the Health app on your iPhone, tap Browse > Respiratory > Cardio Fitness. You’ll see your latest estimated VO2 max and a trend line. But that single number doesn’t tell you if you’re improving or just having a good day. Dorsi reads these metrics and adjusts your strength training in real time, matching load to your actual readiness. The science behind VO2 max—how it’s estimated, what affects it, and when you should pay attention—is what turns a data point into a training tool. In the sections below, we’ll unpack how to interpret your VO2 max and why it matters for your next session. ## Open Health App on Your iPhone Your Apple Watch syncs data to the Health app on your iPhone. Open it—it's the white icon with a red heart. Don't look for VO2 max on the watch itself; the app on your phone stores all the history and breakdowns. This is where the real metrics live. ## Navigate to Cardio Fitness Section Tap Browse at the bottom, then tap Heart. Scroll down to Cardio Fitness—that's where VO2 max lives. Tap it and you'll see a graph of your estimated VO2 max over time. Below that, your latest measurement appears in mL/kg/min. This number updates after outdoor walks or runs with GPS. ## Check Your VO2 Max Ranges Apple categorizes VO2 max into levels: Low, Below Average, Above Average, High, or Very High. Look at the color-coded bar on the Cardio Fitness screen. If you're in the green or blue zones for your age and sex, you're doing great. Red or orange means there's room to improve. ## Boost VO2 Max with Interval Training To raise your number, do high-intensity intervals twice a week. After a warm-up, push hard for 3 minutes at 85-95% of max heart rate, then recover for 2. Repeat 4-6 times. Also add longer, steady cardio at moderate effort. Consistency matters more than intensity—aim for 150 minutes of cardio weekly. ## FAQ ### How do I get my VO2 max on Apple Watch? To get your VO2 max, start an Outdoor Walk, Run, or Hike workout on your Apple Watch (Series 3 or newer). Wear it snugly. After about 20 minutes of steady effort, a cardio fitness estimate appears. The measurement requires GPS signal and consistent pace. Check the Health app later for your number. It updates after each compatible workout. ### How to find VO2 max on Apple Watch app? On your iPhone, open the Health app. Tap Browse, then Respiratory. Select Cardio Fitness (VO2 max) — it’s listed there. On the watch itself, open the Workout app and scroll to the bottom during an outdoor run; you’ll see a live estimate. But the full history lives in Health. No separate watch app for it. ### How do I find my VO2 max? Open the Health app on your paired iPhone. Tap Browse > Respiratory > Cardio Fitness. That’s where your VO2 max sits. If you don’t see it, you need a few outdoor walks or runs with GPS and heart rate. The watch needs at least 20 minutes of steady exercise to estimate. Once recorded, check back anytime. ### Do Apple watches track your VO2 max? Yes — Apple Watch Series 3 and later estimate VO2 max during outdoor walks, runs, and hikes. It uses heart rate from the sensor and GPS from your phone or watch. You don’t need to enable anything; it works automatically when you do an outdoor workout. The reading shows in the Health app under Cardio Fitness. ### does apple watch measure vo2 max accurately Not perfectly accurate like a lab test, but decent for trend tracking. Apple validates against clinical standards; for most people the estimate falls within a few mL/kg/min of real values. Variations happen with wrist placement and sweat. Use it to see if your fitness improves over months, not to diagnose. I trust it for direction.