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Cardiovascular Responses of Women With Chronic Fatigue Syndrome to Stressful Cognitive Testing Before and After Strenuous Exercise

John J. LaManca, PhD, Arnold Peckerman, PhD, Sue Ann Sisto, PT, PhD, John DeLuca, PhD, Sean Cook, BS and Benjamin H. Natelson, MD

From the Chronic Fatigue Syndrome Cooperative Research Center, University of Medicine and Dentistry of New Jersey—New Jersey Medical School, Newark, New Jersey (J.J.L., S.A.S., J.D., S.C., B.H.N.); The Heart Failure Center, Division of Circulatory Physiology, New York Presbyterian Hospital New York, New York (J.J.L.); and Kessler Medical Rehabilitation Research and Education Corporation, West Orange, New Jersey (S.A.S., J.D.).



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  		Fig. 1. HR, SBP, and DBP reactivity for the CFS and healthy, sedentary control groups when performing cognitive tests before, immediately after, and 24 hours after incremental treadmill exercise to exhaustion (mean ± SEM). Reactivity scores were calculated by subtracting the cardiovascular value during baseline from the value obtained during the cognitive test period. a = Significantly different when compared with control (p < .05); b = significantly different from pre-exercise values (p < .05).

 


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  		Fig. 2. The relationship between averaged before and 24 hours after incremental treadmill exercise scores on a CFS symptom severity questionnaire and SBP reactivity during performance of cognitive tests. The symptom severity questionnaire consisted of a Likert severity score for each of the symptoms listed on the 1988 Center for Disease Control case definition of CFS.

 




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