Managing chronic fatigue syndrome: overview and case study.

ABSTRACT

1. The basic principles of envelope theory are explained. By not overexerting themselves, people with CFS can avoid the setbacks and relapses that commonly occur in response to overexertion while increasing their tolerance to activity. 2. By collecting time series data on fluctuations in energy levels, important clinical observations can be made in respect to a client's unique condition and experience with CFS.