Review for 10.1186/s12876-019-1034-9 (2019)

Reviewer’s report
Title:  Structured  physical  activity  interventions  as  a  complementary  therapy  for  patients  with  
inflammatory bowel disease – a scoping review and practical implications
Version: 2 Date: 06 May 2019
Reviewer: Aaron Walfish
Reviewer's report:
The authors did a nice job reviewing a challenging topic due to the very heterogeneous primary sources  
and the lack of robust trials on the topic. 
When reviewing and summarizing the trials you stated in line 181 "progressive training protocol leads  
to a significant improvement" can you clarify what significant improvement means as you do not  
provide confidence intervals.  This comment applies to table 2 where in the main findings column the  
authors do not define what they mean by "significant" throughout that column.
There are a number of grammatical and spelling errors. 
Line 36 "save" should be safe.
Line 40  "considered by PA interventions" does not make sense in addition since this the first time PA  
appears it should be written out in full. 
Line 54 "in addition it appears to rise worldwide"  should "be rising" worldwide
Line 57 "There is still a quite lack of knowledge" the word quite should be deleted
Line 60  "Both diseases show symptoms like diarrhea, constipation, abdominal cramps" Would deleted  
out constipation UC does not classically have constipation.
Line 255 "effects of moderat PA on" moderate is missing an e
line 261 "It is premature to state that exercise has an positive impact" an should be a
line 310 "fatigue as outcome" should read fatigue as an outcome add the word an
line 355 "study from found" delete the word from
line 344 "Besides these effects it is likely that regular PA" I do not believe from the data provided that  
the word "likely" is appropriate. The data supplied for exercise to have a beneficial anti-inflammatory  
impact on immunologic biomarkers in IBD should be stated as possible.
line 359 "Non of the studies" none is missing an e
line 364 "time constrains and pregnancy" constraints is missing a t
Are the methods appropriate and well described?
If not, please specify what is required in your comments to the authors.
Yes
Does the work include the necessary controls?
If not, please specify which controls are required in your comments to the authors.
Yes
Are the conclusions drawn adequately supported by the data shown?
If not, please explain in your comments to the authors.
Yes
Are you able to assess any statistics in the manuscript or would you recommend an additional  
statistical review?
If  an  additional  statistical  review  is  recommended,  please  specify  what  aspects  require  further  
assessment in your comments to the editors.
I am able to assess the statistics
Quality of written English
Please indicate the quality of language in the manuscript:
Needs some language corrections before being published
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