Footnotes

• Twitter @davie_mulenga, @JS_Wallace52, @owoeye_oba

• Contributors MD conceived and designed the study, wrote the first draft of the manuscript and conducted the literature review for the study content. SM contributed to the manuscript development. OBAO and JW contributed to the design, and provided additional literature relevant to the study. All authors contributed to the critical revision of manuscript drafts and approved the final version.

• 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 Dr Oluwatoyasi Owoeye is a deputy editor of the British Journal of Sports Medcine.

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