Date	Event	Description
13 September 2011	New citation required and conclusions have changed	1. There has been a change in authorship. 2. The conclusions have changed. As well as reflecting the inclusion of more evidence, the changed conclusions reflect the change in the primary outcomes, in the categorisation of the exercise interventions, and consideration of the potential consequences of the missing data.
13 September 2011	New search has been performed	For this update, published in Issue 11, 2011, the following changes were made: 1. The search was updated to January 2011 and 62 new trials were included; 2. The methodology has been updated to include the reclassification of outcome measures and exercise categories and the reclassification of some interventions from original studies. New comparisons are included; 3. Risk of bias is now assessed; 4. All analyses are now based on the new categories of outcome measures and exercise interventions; 5. The conclusions have changed.
7 July 2008	Amended	Converted to new review format.