Research-backed recovery, not vibes

“Consider easing off” isn't advice — it's a shrug. Vitra aims for the opposite: a concrete action with a reason you can check. Instead of a mood, you get something like “cut training intensity for a couple of days” tied to the signal that triggered it and the paper behind the rule.

How it works

Rules from papers

Alerts are derived from peer-reviewed research across HRV, resting heart rate, body temperature, sleep, training load and cardio fitness.

Cited, not vague

Each flag carries a citation and a concrete action — you can look up the source.

Applied to your data

The science is general; the personalisation comes from your own rolling baselines.

No black-box LLM

Vitra's 'AI' is research rules + statistics, not a large language model. Nothing leaves your machine.

Honest about uncertainty

Confidence is shown, and Vitra stays quiet on nights with insufficient data rather than inventing a verdict.

See the methodology

Trust comes from transparency, not branding. The methodology page lists every metric Vitra computes, the rule or statistic behind it, and the published study it draws from — so you can audit the reasoning yourself.

General education, not medical advice. The studies behind these rules describe groups, not you specifically. Vitra is not a medical device and does not diagnose — for health concerns, talk to a clinician.

Frequently asked