An Empirical Investigation of the Envelope Theory

Abstract

The Envelope Theory stipulates that, if perceived and expended energy levels are kept relatively at the same levels, people with Chronic Fatigue Syndrome (CFS) will slowly gain strength and energy. Based on this theory, an intervention was developed that provided feedback to participants with CFS about discrepancies in perceived versus expended energy levels. As part of this intervention, a buddy was provided to help with household tasks in order to reduce excessive energy expenditures. Post-test results revealed a decrease in participants' fatigue severity ratings, and positive changes were recorded for five CFS somatic symptoms. Participants also reported increases in optimism regarding recovery, positive re-interpretation and growth, and information seeking behavior. The implications of these findings are discussed.

Key Words:

• Chronic Fatigue Syndrome
• growth
• recovery
• implications of CFS
• CFS symptoms