Can't find where we first discussed this, but this is a nice critique, and written by Edinburgh based folk:
http://bjsm.bmj.com/content/early/2015/10/28/bjsports-2015-095120.full
nice footnote: "Twitter Follow Paul Kelly at @narrowboat_paul, Justin Richards at @JRLovesCycling and Nanette Mutrie at @nanettemutrie"