Report on swimming benefits
Swim England is all about promoting swimming, so it’s hardly an unbiased source on this topic, but I don’t really doubt the findings of the report they commissioned:
The report particularly highlights the benefits of swimming and aquatic activities for people with mental health concerns or problems with their joints and muscles.
Or maybe a little doubt, because a 2014 review of aquatic therapy for miscellaneous musculoskeletal problems concluded it was no better than dry rehab. Hmm.