Health and Environmental Illness

Resources about environmental illness and non-drug treatments

ME/CFS Exercise Studies

The Two-Day Cardiopulmonary Exercise Test

Dr. Betsy Keller

‘A Foreign and Illogical Result’: Dr. Betsy Keller on Exercise Testing in Chronic Fatigue Syndrome (ME/CFS)
by Cort Johnson, Sep. 17, 2013

Inability of myalgic encephalomyelitis/chronic fatigue syndrome patients to reproduce VO2peak indicates functional impairment
Betsy A Keller, John Luke Pryor and Ludovic Giloteaux
Journal of Translational Medicine, 2014, 12:104

A Pair of Identical Twins Discordant for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Differ in Physiological Parameters and Gut Microbiome Composition
Ludovic Giloteaux, Maureen R. Hanson, Betsy A. Keller
American Journal of Case Reports, 2016; 17:720-729

The Workwell Foundation / Pacific Fatigue Lab

Workwell Foundation


Objective Evidence of Post-exertional “Malaise” in Myalgic Encephalomyelitis and Chronic Fatigue Syndrome
Frank NM Twisk, Journal of Sports Medicine & Doping Studies 5:159, 2015

2010 ME/CFS Research Overview Pt II: The Exercise Studies: Validation and Progress
by Cort Johnson, Phoenix Rising, April 4, 2011

Post-Exertional Malaise/Fatigue and Exercise
by Marjorie van de Sande, Quest #60, June/July 2003 PDF: Quest #60
A referenced description of the physical effects of exercise on ME/CFS patients, following the Canadian Case Definition.

Updated 6/17/2017