Date	Event	Description
5 March 2020	New search has been performed	We included three new trials in this update (Barrett 2018; Dias 2014; Silva 2018), for a total of 14 included trials. Exercise reduced the severity of acute respiratory infection symptoms (2 trials; moderate‐certainty evidence) and decreased the number of symptom days (during the follow‐up period, 12 weeks) (4 trials; low‐certainty evidence). We recruited two new authors, and three of the original authors withdrew from this update.
5 March 2020	New citation required and conclusions have changed	Conclusions changed for three primary outcomes. Severity of acute respiratory infection symptoms outcome (previously no significant difference between groups) now shows a significantly lower Wisconsin Upper Respiratory Symptom Survey (WURSS‐24) score in the exercise group (mean difference −103.6). The number of symptom days in the follow‐up period is now significantly less (−2.24 days) in the exercise group. The number of symptom days per episode of illness was previously significantly lower in the exercise group; there is now no significant difference between groups for this outcome.