Get your fitness age based on your VO2 Max

Show HN: Get your fitness age based on your VO2 Max

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I built this because I realized the 'VO2 Max' number in Apple Health doesn't tell you much without context.I implemented the HUNT Linear algorithm (based on 55k participants) in a Next.js app to map raw VO2 max numbers to a 'Biological Age'.I also added a /llms.txt endpoint so you can curl the documentation or let ChatGPT read the normative data tables directly without hallucinating.It's a free web tool, but I also wrapped it in an iOS app for notifications/widgets if you want to track it long-term

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Website: www.vo2maxpro.com/#calculator