Research & methodology
Whitepapers and research notes
This is where we collect the scientific background behind Elara. When new data changes our interpretation, we update it visibly rather than turning an early hypothesis into a product claim.
Whitepaper · v1.0
Energy Envelope Theory: the scientific basis for pacing
How the relationship between available energy and actual demand can frame pacing in ME/CFS — with methodology, literature, and practical interpretation.
Read the whitepaperUpdated research note · Sep 14, 2026HRV and PEM: What Wearables Can Show — and What They Cannot
Why HRV and resting heart rate can add context to trajectories but, in our current analyses, are not reliable stand-alone 24–72-hour early warnings for PEM.
Read the current interpretationCurrent evidence
How we interpret evidence
Observational data can reveal patterns, but it does not by itself establish prediction or effectiveness. Our methodology page explains data sources, limitations, and editorial standards.
View methodology