Detection of Urine Metabolites in a Rat Model of Chronic Fatigue Syndrome before and after Exercise.
Shao, Changzhuan, Ren, Yiming, Wang, Zinan et al.·BioMed research international·2017
Researchers used rats exposed to stress and exercise to model ME/CFS and then measured chemicals in their urine before and after exercise. They found abnormalities in how the rats' bodies produce energy and process hormones, particularly in molecules called sphingosine and a hormone precursor called 21-hydroxypregnenolone. These findings suggest that ME/CFS may involve disrupted energy metabolism and problems with the body's stress-response system.