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[Correspondence] Graded exercise self-help for chronic fatigue syndrome in GETSET

The results of the guided graded exercise self-help trial (GETSET) by Lucy Clark and colleagues1 reaffirm that graded exercise therapy (GET) is not a rehabilitative treatment for chronic fatigue syndrome.2 Although fatigue (measured by Chalder Fatigue Questionnaire [CFQ]) and physical functioning (assessed using the Short Form-36 physical function [SF-36 PF] subscale) improved in the guided graded exercise self-help (GES) group (and the non-intervention group), these effects were by far insufficient to come close to the normal levels defined previously3 by one of the GETSET authors (CFQ ≤6 and SF-36 PF ≥85).