[Comparison of differential metabolites in urine of the middle school students with chronic fatigue syndrome before and after exercise].

Objective: To study the differential metabolites in urine and the characteristics of metabolic pathway of middle school students with chronic fatigue syndrome (CFS) before and after exercise, and then explain the metabolic mechanism of CFS.

Methods: Eight male middle school students (age:17-19) with CFS were selectedas the CFS group according to CFS screening criteria of the U.S.