Date	Event	Description
1 March 2021	Amended	A note on the status of the review has been moved from the Abstract to an Editorial note.
15 June 2020	Amended	The comments received about the review have been reordered to present the most recent comments first.
21 May 2020	Amended	Addition of the following text to the beginning of the Abstract, 'A statement from the Editor in Chief about this review and its planned update is available here: www.cochrane.org/news/publication-cochrane-review-exercise-therapy-chronic-fatigue-syndrome.
12 March 2020	Amended	Note added from the editorial team at Cochrane Editorial and Methods Department on 12 March 2019, 'A webpage providing information and regular updates on the progress of the planned update of this Cochrane Review is available here: community.cochrane.org/organizational-info/people/central-executive-team/editorial-methods/projects/stakeholder-engagement-high-profile-reviews-pilot'.
13 February 2020	Amended	Added text to clarify the date and nature of the changes made to the review version published on 2 October 2019 (doi.org/10.1002/14651858.CD003200.pub8). Specifically, text has been added to the events below dated 8 August 2019 and the published note section of the review.
6 February 2020	Amended	Addition of new published note from the editorial team at Cochrane Editorial and Methods Department, 'A statement from the Editor in Chief about this review and its planned update is available here: www.cochrane.org/news/publication-cochrane-review-exercise-therapy-chronic-fatigue-syndrome.’
8 August 2019	New citation required and conclusions have changed	The following changes were made as part of the review version published on 2 October 2019 (doi.org/10.1002/14651858.CD003200.pub8). Interpretation of the evidence now reflects the following changes to the review: restructuring the analysis of fatigue to combine data with standardised mean differences; inclusion of long‐term effects on fatigue as a 'Summary of findings' table outcome; changed GRADE rating for adverse reactions; and acknowledgement of the criteria used to define chronic fatigue syndrome by study investigators. This event, generated on 8 August 2019, relates to the review version published on 2 October 2019 (doi.org/10.1002/14651858.CD003200.pub8).
8 August 2019	Amended	Review amended in response to a formal complaint and editorial review. See new published note for details. This event generated on 8 August 2019, relates to the review version published on 2 October 2019 (doi.org/10.1002/14651858.CD003200.pub8).
17 June 2019	Amended	Addition of new published note, 'Cochrane’s Editor in Chief has received the revised version of the review from the author team with changes made in response to the complaint by Robert Courtney. The process has taken longer than hoped; the amended review is being finalised and it will be published during the next 2 months.'
8 March 2019	Amended	Addition of new published note 'Cochrane’s editors and the review author team have jointly agreed that there will be a further period up to the end of May 2019, in which time the author team will amend the review to address changes aimed at improving the quality of reporting of the review and ensuring that the conclusions are fully defensible and valid to inform health care decision making. The changes will also address concerns raised in feedback since the Robert Courtney complaint. The amendment will not include a full update, but a decision about this will made subsequently.'
5 December 2018	Feedback has been incorporated	Feedback has been added, along with a response from the Cochrane Common Mental Disorders (CMD) Review Group
30 November 2018	Amended	Addition of new published note 'The author team has re‐submitted a revised version of this review following the complaint by Robert Courtney. The Editor in Chief and colleagues recognise that the author team has sought to address the criticisms made by Mr Courtney but judge that further work is needed to ensure that the review meets the quality standards required, and as a result have not approved publication of the re‐submission. The review is also substantially out of date and in need of updating. Cochrane recognises the importance of this review and is committed to providing a high quality review that reflects the best current evidence to inform decisions. The Editor in Chief is currently holding discussions with colleagues and the author team to determine a series of steps that will lead to a full update of this review. These discussions will be concluded as soon as possible'.
9 November 2018	Feedback has been incorporated	Feedback has been added, along with a response from the Cochrane Common Mental Disorders (CMD) Review Group
2 November 2018	Feedback has been incorporated	Feedback has been added, along with a response from the Cochrane Common Mental Disorders (CMD) Review Group
25 October 2018	Amended	Addition of new published note 'This review is subject to an ongoing process of review and revision following the submission of a formal complaint to the Editor in Chief. Cochrane considers all feedback and complaints carefully, and revises or updates reviews when it is appropriate. The review author team have advised us that a resubmission of this review is imminent. A decision on the status of this review will be made once this resubmission has been through editorial process, which we anticipate will be towards the end of November 2018'.
5 October 2017	Feedback has been incorporated	Feedback has been added, along with the authors' response
5 May 2017	Feedback has been incorporated	Feedback has been added, along with the authors' response.
21 June 2016	Feedback has been incorporated	Feedback has been added, along with the authors' response.
1 February 2016	Feedback has been incorporated	Feedback has been added along with the authors' response.
20 November 2014	New citation required but conclusions have not changed	Four new studies have been added in this update, and the conclusion strengthens results reported in the 2004 version of the review.
2 October 2014	New search has been performed	This review has been updated with newer methodology, and new studies have been incorporated.
1 November 2008	Amended	This review has been converted to the new review format
25 May 2004	New search has been performed	The protocol for this review has undergone post hoc alteration based on feedback from referees. The following sections have been altered: Types of interventions; Search strategy; Methods of the review
8 May 2004	New citation required and conclusions have changed	Substantive amendments have been made