Received: 17 February 2021
Accepted: 21 April 2021
First Online: 9 June 2021
: No approval from Institutional Review Board (IRB) and the National Ethics Committee was necessary as this was a non-interventional observational study.
: Permission to store and review patient data was obtained from the Danish Data Protection Agency Jr, No. 2007–58-0015.
: ○ Speakers bureau/paid presentations for a company or supplier:▪ Two co-authors appointed to speaker for Zimmer Biomet.○ Paid consultant for a company or supplier:▪ One co-author is a consultant for Zimmer Biomet and one co-author has received honoraria for expert testimony on the efficacy of exercise therapy to enhance recovery after surgery at meetings or symposia held by biomedical companies (Novartis).○ Research support from a company or supplier as a Principal Investigator:▪ One co-author is a principal investigator and has previously received research support from Zimmer Biomet.○ Royalties, financial or material support from publishers:▪ One co-author has received fees and royalties for authored textbook chapters (Munksgaard Denmark).○ Medical/Orthopaedic publications editorial/governing board:▪ One co-author is editorial board member (PLOS ONE).○ Board member/committee appointments for a society:▪ One co-author is a member of the board at European Knee Society (EKS) since 2015, and one co-author has received committee appointment for the Danish Society of Sports Physical Therapy (DSSF) and committee appointment for the International Society for Arthroplasty Registries (ISAR).