n such instances, however, quality criteria usually recommend using objective outcomes as these are less prone to various biases. [4] Randomized trials on rehabilitative interventions for ME/CFS have included several objective outcomes such as work resumption, healthcare utilization, actigraphy, and various fitness tests. The results of these objective outcomes were summarized in a review by Vink & Vink-Niese. [5] Overall these showed no clinically significant improvements which was likely one of the reasons for the NICE guideline committee to downgrade the evidence for rehabilitative interventions to low or very low quality. If large effects were seen on objective outcomes including ME/CFS patients returning to work, increasing their fitness level, or requiring less healthcare, the committee would likely not have downgraded the results of these trials.