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Elara Health is based on peer-reviewed research and validated scientific methods to support people with chronic conditions.
Prof. Leonard Jason, DePaul University
The Recovery Need Score in Elara is based on the Energy Envelope Theory, developed by Prof. Leonard Jason and his team.
The theory describes that people with ME/CFS can alleviate their symptoms by only expending as much energy as they currently have available.
Goal
Avoid both overexertion and underexertion, as both can negatively affect recovery.
Energy Envelope Quotient
(Expended ÷ Available) × 100
Available Energy
Scale 1-100 (100 = pre-illness)
Expended Energy
Actually expended during the day
The quotient indicates whether you are within your optimal energy range.
Pacing is consistently rated by patients as one of the most helpful strategies
Individuals within their Energy Envelope show better physical function outcomes
Overexertion can negate the benefits of higher energy levels
Daily monitoring is a cost-effective self-management intervention
Important Note
The Energy Envelope Theory does not work the same for everyone. The score is intended as guidance, not a rigid prescription.
In addition to the Energy Envelope Theory, Elara uses other scientifically validated methods:
Fatigue Severity Scale (FSS)
Krupp et al., 1989
Standardized Lab Reference Ranges
Clinical Guidelines
Symptom Tracking
ePRO Standards
The scientific foundation of our methodology is based on these peer-reviewed studies.
Jason, L., Muldowney, K., Torres-Harding, S. (2008)
"The Energy Envelope Theory and myalgic encephalomyelitis/chronic fatigue syndrome"
AAOHN Journal, 56(5): 189-195
Discover how Elara can help you better manage your energy and improve your well-being.
Last updated: January 2026