Footnotes

• Twitter @vanrunphysio, @runnerphysio

• Contributors TVM and CN conceived the idea. TVM wrote the first draft. Both TVM and CN revised and approved all subsequent drafts.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

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