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Improved early outcome after TKA through an app-based active muscle training programme—a randomized-controlled trial

  • Sebastian Hardt
  • Matthias R. G. Schulz
  • Tilman Pfitzner
  • Georgi Wassilew
  • Hauke Horstmann
  • Emmanouil Liodakis
  • Thomas Sanjay Weber-Spickschen
Knee
  • 204 Downloads

Abstract

Purpose

The purpose of this prospective randomized-controlled trial (RCT) was to evaluate if an app-based feedback-controlled active muscle training programme can be used to improve the outcome in the immediate postoperative period after total knee arthroplasty (TKA).

Methods

Sixty patients, with a median age of 65.9 years (range 45–84), awaiting primary TKA were randomized into a control and training group. Both groups followed an identical postoperative protocol. In addition, the training group postoperatively performed an app-based feedback-controlled active muscle training programme multiple times daily. Outcome measures were active and passive range of motion (ROM), pain at rest and in motion, knee extension strength, the timed “Up and Go”, 10-m Walk Test, 30-s Chair Stand Test, Knee Injury and Osteoarthritis Outcome Score (KOOS), Knee Society Score (KSS), and clinical data.

Results

The training group performed an average of 18.4 training sessions, which led to significantly higher ROM, less pain at rest and in motion, higher strength, and significantly higher functional scores. More training correlated with a better outcome.

Conclusions

The use of an app-based feedback-controlled active muscle training programme can improve the clinical outcome after TKA, especially ROM and reduce pain. Clinically relevant is that the training programme could be considered an alternative to continuous passive motion after total knee arthroplasty.

Level of evidence

II.

Keywords

Total knee arthroplasty TKA App-based training programme Functional outcome Rehabilitation GenuSport 

Abbreviations

BMI

Body mass index

ERAS

Enhanced recovery after surgery

ITT

Intention-to-treat

KOOS

Knee Injury and Osteoarthritis Outcome Score

KSS

Knee Society Score

NRS

Numeric rating scale

n.s.

Not significant

PP

Per protocol

RCT

Randomized-controlled trial

ROM

Range of motion

SD

Standard deviation

TKA

Total knee arthroplasty

Notes

Author contributions

SH and MRGS contributed equally to this study. All authors made substantial contributions. Conception and Design: SH, MRGS, TP, HH, and TSWS. Acquisition or Analysis and Interpretation of Data: SH, MRGS, GW, EL, and TSWS. Drafting or Revising the Manuscript: SH, MRGS, TP, GW, HH, EL, and TSWS. Final Approval of the Submission: SH, MRGS, TP, GW, HH, EL, and TSWS.

Funding

This research received no funding.

Compliance with Ethical Standards

Conflict of interest

Author TP has received payment by Depuy Synthes for consultancy and by Depuy Synthes and Link for development of educational presentations, but not related to this study. Author TSWS is the inventor of GenuSport and has a patent pending. The rest of the authors declare that they have no conflict of interest in relation to this manuscript.

Ethical approval

The study protocol was reviewed and approved by the institutional ethics committee (Hannover Medical School, No. 300-20016). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Copyright information

© European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2018

Authors and Affiliations

  1. 1.Center for Musculoskeletal SurgeryCharité-University Medicine BerlinBerlinGermany
  2. 2.Trauma DepartmentHannover Medical SchoolHannoverGermany
  3. 3.Klinik für Endoprothetik, Knie- und HüftchirurgieVivantes Klinikum SpandauBerlin SpandauGermany
  4. 4.Department of Orthopedic SurgeryHannover Medical SchoolHannoverGermany
  5. 5.Institute of Sports MedicineHannover Medical SchoolHannoverGermany

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