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dancing james
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Citation is needed
Nah, go and find it yourself, you lazy wotsit. :)
Seriously, it's all over the place. You can start with NICE (although it's about walking and cycling):
An evidence review:
https://www.nice.org.uk/guidance/ph41/evidence/synthesis-of-evidence-pdf-430225309Overview page:
https://www.nice.org.uk/guidance/ph41
Oliver Schick