Predicting post-exertional malaise in Gulf War Illness based on acute exercise responses.

Life Sciences
Alexander E BoruchDane B Cook

Abstract

Post-exertional malaise (PEM) is poorly understood in Gulf War Illness (GWI). Exercise challenges have emerged as stimuli to study PEM; however, little attention has been paid to unique cardiorespiratory and perceptual responses during exercise. This study tested whether select exercise parameters explained variability in PEM responses. Visual analog scale (0-100) versions of the Kansas questionnaire were used for daily symptom measurements one week before and one week after 30-min of cycling at 70% heart rate reserve in 43 Veterans with GWI and 31 Veteran controls (CON). Cardiopulmonary exercise testing (CPET) methods were used to measure oxygen (VO2), carbon dioxide (VCO2), ventilation (VE), heart rate, work rate, and leg muscle pain. Symptom changes and CPET parameters were compared between groups with independent samples t-tests. Linear regression (GLM) with VE/VCO2, cumulative work, leg muscle pain, and self-reported physical function treated as independent variables and peak symptom response as the dependent variable tested whether exercise responses predicted PEM. Compared to CON, Veterans with GWI had greater ventilatory equivalent for oxygen (VE/VO2), peak leg muscle pain, fatigue, and lower VCO2, VO2, power, and cumul...Continue Reading

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Citations

Oct 21, 2021·Pain Medicine : the Official Journal of the American Academy of Pain Medicine·Ellen E BarhorstJacob B Lindheimer

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