Helix

About

The complete engine for an athlete

Helix measures every system of your body, sleep, strain, recovery, strength and blood, then connects them and turns them into your next move.

Most health apps hand you a number and expect you to trust it. We think the reasoning matters as much as the reading, which is why we publish deep dives: long, sourced investigations into the physiology underneath the figures the app produces. They are written to be useful whether or not you ever install anything.

They are also written to be checkable. Every chart states whether it shows measured data or a model, every model prints its assumptions, and every piece carries a chapter on where its own argument breaks down. The rules we hold ourselves to are published in full.

Read our editorial standards

A note on what this is not

Nothing we publish is medical advice, and none of it is personalised to you. Helix is a tool for measuring and interpreting your own data, not a clinician. If something in your readings worries you, or you manage a condition that affects exercise, sleep or nutrition, talk to a doctor rather than to an algorithm.