VO2 max: The Apple Watch metric that reveals your aerobic fitness

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Max-out your aerobic fitness with Apple Watch by checking the VO2 max metric.
Max out your aerobic fitness with Apple Watch.
Photo: Graham Bower/Cult of Mac

Want to know how fit you really are? Apple Watch provides loads of insightful metrics you could check. So many, in fact, that there is not enough space for them all in the Workout app. Instead, you’ll find much of this crucial data buried away in the Health app on your iPhone.

One of the most interesting is VO2 max, which is basically the ultimate test of your aerobic fitness. If you’re into endurance sports, VO2 max is a metric you’ll want to check out.

Here’s a quick guide to everything you need to know about VO2 max on Apple Watch: What it is, how to use it, and how to improve yours.

How to win Apple Watch Activity Competitions every time

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Apple Watch arm wrestling
Apple's Apple Watch business grew 50% last quarter.
Photo: Graham Bower/Cult of Mac

Apple Watch Activity Competitions are a perfect way to fall out with friends and colleagues. Simply send a challenge via the Activity app on your watch and, if they accept, a seven-day grudge match commences.

With Activity Competitions, a new feature in watchOS 5, it’s not the taking part that counts. It’s the winning. The winner receives a shiny virtual medal to add to their awards, while the loser gets zip.

Fortunately, when you know how Activity Competitions work, you can maximize your chance of winning every time. Here’s how.

Get the Cult of Mac Fitness Handbook, an exclusive free ebook

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Check out our free ebook
Check out our free ebook
Photo: Graham Bower/Cult of Mac

After undergoing successful chemotherapy treatment for cancer, Apple’s fitness gadgets helped me turn my life around and get fit in middle age. So I know from personal experience just how important they can be. That’s why I focus on fitness for Cult of Mac, and it’s why I’ve written The Cult of Mac Fitness Handbook: Get in Shape With iPhone and Apple Watch.

Today, I’m in the best shape of my life, and I rely on my iPhone and Apple Watch to help keep me that way.

They are powerful tools for getting fit and losing weight — if you know how to use them.

Inside Apple’s top secret health lab

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Where no camera crew has gone before. Photo: ABC News

Apple rarely gives tours of its facilities, but it showed ABC News the inner workings of its top secret health lab for the purpose of hyping the upcoming Apple Watch.

Located in an unassuming lot near its Cupertino headquarters on 1 Infinite Loop, Apple employees have been working out for years in secret to collect valuable health and fitness data.

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