Betsy Keller

Source: ithaca.edu

Betsy A. Keller, PhD, is a professor in the Department of Exercise & Sport Sciences at Ithaca College in New York. She is a fellow of the American College of Sports Medicine (ACSM), past member of the Board of Trustees of ACSM, and past president and former department chair of the Mid-Atlantic Regional Chapter of ACSM.

Since 2005, she has provided 2-day cardiopulmonary exercise testing (CPET) for persons with ME/CFS for purposes of research and/or to provide an objective assessment of functional capacity and ability to perform and recover following physical work for disability reports. She studies the effects of physical activity in ME/CFS on parameters of physiological and immune function.

In 2015 Keller said "Given what we have learned in the past eight years about this illness, it is intellectually embarrassing to suggest that ME is a psychological illness."

She was one of the experts on the "Committee on the Diagnostic Criteria for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome" that was convened for the 2015 Institute of Medicine report.

Notable studies

• 2018, Eukaryotes in the gut microbiota in myalgic encephalomyelitis/chronic fatigue syndrome (Full Text)
• 2016, A Pair of Identical Twins Discordant for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Differ in Physiological Parameters and Gut Microbiome Composition
• 2014, Inability of myalgic encephalomyelitis/chronic fatigue syndrome patients to reproduce VO₂peak indicates functional impairment (Full Text)

Talks & interviews

• 2016, 12th International IACFS/ME Biennial Clinical and Research Conference, Emerging Science and Clinical Care, How Cardiopulmonary Exercise Testing Informs Pathology and Treatment(Workshop given with Christopher Snell, Ph.D. and Mark VanNess, Ph.D.)
• 2013, ‘A Foreign and Illogical Result': Dr. Betsy Keller on Exercise Testing in Chronic Fatigue Syndrome (ME/CFS)

Online presence

• PubMed - Betsy Keller

Learn more

• Ithaca College - Betsy Keller
• 2014, NEW DIAGNOSTIC TOOLS FOR ME/CFS
• 2012, Exercise Testing and Using a Heart Rate Monitor

See also

• Exercise based on 2-day CPET
• Institute of Medicine

two-day cardiopulmonary exercise test (CPET) - A diagnostic test which involves testing an ME/CFS patient exercising on an exercise machine, while monitoring their respiration, especially oxygen consumption. This test is repeated the following day in order to confirm the patient's inability to replicate the first-day performance. This test is thought to be the most objective way to detect post-exertional malaise.

objective outcome An outcome of a clinical trial that is independent of the judgement of opinion of the assessor/clinician, e.g. distance walked in 6 minutes. Patient-reported outcomes like questionnaires are not objectives.

physiological Concerning living organisms, such as cells or the human body.  Physio logical (as in physio) is not to be confused with psych ological (emotional stress).

myalgic encephalomyelitis (M.E.) - A disease often marked by neurological symptoms, but fatigue is sometimes a symptom as well. Some diagnostic criteria distinguish it from chronic fatigue syndrome, while other diagnostic criteria consider it to be a synonym for chronic fatigue syndrome. A defining characteristic of ME is post-exertional malaise (PEM), or post-exertional neuroimmune exhaustion (PENE), which is a notable exacerbation of symptoms brought on by small exertions. PEM can last for days or weeks. Symptoms can include cognitive impairments, muscle pain (myalgia), trouble remaining upright (orthostatic intolerance), sleep abnormalities, and gastro-intestinal impairments, among others. An estimated 25% of those suffering from ME are housebound or bedbound. The World Health Organization (WHO) classifies ME as a neurological disease.

eukaryote any cell or organism that possesses a clearly defined nucleus, unlike bacteria. Eukaryotes include yeast, fungus, plants, and animals.

microbiome The full collection of microscopic organisms (especially bacteria and fungi) which are present in a particular environment, particularly inside the human body.

physiological Concerning living organisms, such as cells or the human body.  Physio logical (as in physio) is not to be confused with psych ological (emotional stress).

microbiome The full collection of microscopic organisms (especially bacteria and fungi) which are present in a particular environment, particularly inside the human body.