Footnotes

• Contributors In terms of preparing the commentary, CV drafted the initial version, SJA conducted additional statistical analyses to produce table 1 and all other authors provided constructive feedback/edits for improvement. All authors read, edited and approved the commentary. In terms of the studies on which the commentary is based: CV, MJD, GSK, CMC, AJM and WKM conceived the project and procured the project funding. GSK led the coordination of the trial. CV, MJD, GSK, CMC, AJM, RRR and WKM assisted with the protocol design. TNS managed the trial including data collection with data management from AVI. RT developed the WALK 2.0 website. MJD performed the sample size calculations. CO conducted the analyses for both studies. MJD, GSK, CO and RRR interpreted the data.

• Funding The trials were funded by the National Health and Medical Research Council of Australia (Project grant number 589903).

• Competing interests CV (ID 100427) and MJD (ID 100029) are supported by a Future Leader Fellowship from the National Heart Foundation of Australia.

• Patient consent Not required.

• Ethics approval Western Sydney University Human Research Ethics Committee.

• Provenance and peer review Not commissioned; externally peer reviewed.