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Research, updates and stories.

Everything we learn about health, we share — not just with our users, with everyone.

Research

Sleep quality as a predictor of recovery capacity

An analysis of 4,200 measurements shows how sleep data predicts post-exercise recovery.

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Product

New: heart rate variability now standard in every report

As of this month, HRV appears automatically in your Pulse report, including a quarterly trend line.

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Nutrition

Why "eating healthy" means something different for everyone

Your iron, vitamin D and blood sugar levels all help determine what a good diet looks like for you.

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Research

Iron status in active women: a more common blind spot

1 in 3 active women in our cohort showed suboptimal iron status, often without symptoms.

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Training

Measuring recovery matters as much as measuring training

Why your recovery data deserves just as much attention as your training data — and how to do it in practice.

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Research

Quarterly measurements double the odds of lasting change

Users who measure every quarter stick with new habits twice as often as one-time measurers.

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