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mashton in reply to @hoefla

Isn't there a bit of a cause vs correlation issue with this?

Again, if I understand you correctly, this was asked in the comments. The actual study paper makes it clear that they controlled for BMI, lifestyle etc to try and remove showing the unastonishing result that healthy people tend to cycle more.

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NotThamesWater in reply to @mashton

the unastonishing result that healthy people tend to cycle more.

Or vice versa - People that cycle more tend to be more healthy - which is why correlation <> causation. Healthy people cycling more may be a confounding factor when yo try to work out if cycling people are more healthy.

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