syndromes
Med Sci Sports Exerc. 2010 Jan;42(1):16-22.
Togo F, Natelson BH, Cherniackdagger NS, Klapholz M, Rapoport DM, Cook DB.
1Pain & Fatigue Study Center, Department of Neurosciences, UMDNJ-New Jersey
Medical School, Newark, NJ; 2Department of Work Stress Control, Japan
National Institute of Occupational Safety and Health, Kawasaki, JAPAN;
3Department of Medicine, UMDNJ-New Jersey Medical School, Newark, NJ;
4Department of Medicine, Division of Pulmonary and Critical Care Medicine,
NYU School of Medicine, New York, NY; and 5Department of Kinesiology,
University of Wisconsin School of Education, Madison, WI.
PURPOSE:: Patients with chronic fatigue syndrome (CFS) report that exertion
produces dramatic symptom worsening. We hypothesized this might be due to
the exacerbation of an underlying sleep disorder, which we have previously
demonstrated to exist.
METHODS:: Female patients with CFS and matched healthy controls with no
evidence of major depressive disorder were studied with overnight
polysomnography on a baseline night and on a night after their performance
of a maximal exercise test.
RESULTS:: CFS patients as a group had evidence for disturbed sleep compared
with controls. Although exercise improved sleep for healthy subjects, it did
not do this for the group as a whole. When we stratified the sample on the
basis of self-reported sleepiness after a night's sleep, the patient group
with reduced morning sleepiness showed improvement in sleep structure,
whereas those with increased morning sleepiness continued to show evidence
for sleep disruption.
CONCLUSIONS:: Sleep is disturbed in CFS patients as a group, but exercise
does not exacerbate this sleep disturbance. Approximately half the patients
studied actually sleep better after exercise. Therefore, activity-related
symptom worsening is not caused by worsened sleep.
PMID: 20010134 [PubMed - in process]
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