UNLABELLED: Chronic fatigue syndrome (CFS) and fibromyalgia (FM) are chronic multisymptom illnesses with substantial clinical and diagnostic overlap. We have previously shown that, when controlling for aerobic fitness and accounting for comorbid FM, CFS patients do not exhibit abnormal cardiorespiratory responses during maximal aerobic exercise compared with healthy controls, despite differences in pain and exertion. PURPOSE: The purpose of the present study was to examine cardiac and perceptual responses to steady-state submaximal exercise in CFS patients and healthy controls. METHODS: Twenty-one CFS patients (13 CFS with comorbid FM (CFS + FM)) and 14 controls completed 20 min of submaximal cycling exercise. Impedance cardiography was used to determine cardiac responses during exercise. Systolic blood pressure (SBP), RPE, and leg muscle pain were also measured. Data were analyzed using a doubly multivariate, repeated-measures MANOVA to model the exercise response. RESULTS: There was a significant multivariate time-by-group interaction (P < 0.05). The CFS + FM group exhibited an exercise response characterized by higher stroke index, ventilatory equivalents for oxygen and carbon dioxide and RPE, lower SBP, and similar HR responses compared to controls. CONCLUSIONS: The present results extend on our previous work with maximal exercise and show that CFS and CFS + FM differ in their responses to steady-state exercise. These results highlight the importance of accounting for comorbid conditions when conducting CFS research, particularly when examining psychophysiological responses to exercise.
UNLABELLED: Chronic fatigue syndrome (CFS) and fibromyalgia (FM) are chronic multisymptom illnesses with substantial clinical and diagnostic overlap. We have previously shown that, when controlling for aerobic fitness and accounting for comorbid FM, CFS patients do not exhibit abnormal cardiorespiratory responses during maximal aerobic exercise compared with healthy controls, despite differences in pain and exertion. PURPOSE: The purpose of the present study was to examine cardiac and perceptual responses to steady-state submaximal exercise in CFS patients and healthy controls. METHODS: Twenty-one CFS patients (13 CFS with comorbid FM (CFS + FM)) and 14 controls completed 20 min of submaximal cycling exercise. Impedance cardiography was used to determine cardiac responses during exercise. Systolic blood pressure (SBP), RPE, and leg muscle pain were also measured. Data were analyzed using a doubly multivariate, repeated-measures MANOVA to model the exercise response. RESULTS: There was a significant multivariate time-by-group interaction (P < 0.05). The CFS + FM group exhibited an exercise response characterized by higher stroke index, ventilatory equivalents for oxygen and carbon dioxide and RPE, lower SBP, and similar HR responses compared to controls. CONCLUSIONS: The present results extend on our previous work with maximal exercise and show that CFS and CFS + FM differ in their responses to steady-state exercise. These results highlight the importance of accounting for comorbid conditions when conducting CFS research, particularly when examining psychophysiological responses to exercise.
Authors: F Wolfe; H A Smythe; M B Yunus; R M Bennett; C Bombardier; D L Goldenberg; P Tugwell; S M Campbell; M Abeles; P Clark Journal: Arthritis Rheum Date: 1990-02
Authors: Jacob B Lindheimer; Aaron J Stegner; Glenn R Wylie; Jacquelyn C Klein-Adams; Neda E Almassi; Jacob V Ninneman; Stephanie M Van Riper; Ryan J Dougherty; Michael J Falvo; Dane B Cook Journal: Int J Psychophysiol Date: 2019-11-28 Impact factor: 2.997
Authors: Mira Meeus; Kelly Ickmans; Filip Struyf; Daphne Kos; Luc Lambrecht; Barbara Willekens; Patrick Cras; Jo Nijs Journal: Clin Rheumatol Date: 2014-10-14 Impact factor: 2.980
Authors: Benjamin H Natelson; Diana Vu; Jeremy D Coplan; Xiangling Mao; Michelle Blate; Guoxin Kang; Eli Soto; Tolga Kapusuz; Dikoma C Shungu Journal: Fatigue Date: 2017-02-20
Authors: Ruth R Miller; W Darlene Reid; Andre Mattman; Cristiane Yamabayashi; Theodore Steiner; Shoshana Parker; Jennifer Gardy; Patrick Tang; David M Patrick Journal: J Transl Med Date: 2015-05-20 Impact factor: 5.531
Authors: Sanjay K Shukla; Dane Cook; Jacob Meyer; Suzanne D Vernon; Thao Le; Derek Clevidence; Charles E Robertson; Steven J Schrodi; Steven Yale; Daniel N Frank Journal: PLoS One Date: 2015-12-18 Impact factor: 3.240