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· DOS Abstracts
Efficacy of pre-operative progressive resistance
training in patients undergoing total knee arthroplasty
– 1 year follow-up
Birgit Skoffer, Thomas Maribo, Inger Mechlenburg, Kjeld Søballe, Ulrik Dalgas
Department of Physical and Occupational Therapy, Aarhus University Hospital,
Denmark; Rehabilitation Center Marselisborg, Department of Public Health,
Section of social medicine and rehabilitation, Aarhus University, Denmark;
Orthopaedic Research Centre, Aarhus University Hospital, Denmark;
Orthopaedic Research Centre, Aarhus University Hospital, Denmark; Section of
Sport Science, Department of Public Health, Aarhus University, Denmark
Background:
Efficacy of pre-operative progressive resistance training (PRT) on
functional performance and muscle strength was previously demonstrated six
and twelve weeks after total knee arthroplasty (TKA).
Purpose / Aim of Study:
To investigate the efficacy of PRT one year post-
operatively in patients undergoing total knee arthroplasty.
Materials and Methods:
59 patients were included in a single- blind, rand-
omized, clinical, controlled trial. Participants were randomized to preoperative
PRT (PRT group) or to a control group who “lived as usual” the last 4 weeks
before TKA. The PRT group comprised 4-weeks of pre- operative and 4 weeks
of post- operative progressive resistance training (PRT) compared to 4 weeks
of post-operative PRT in the control group, and outcome measures were func-
tional performance, e.g. 30s chair stand test (30sCST), knee extensor and knee
flexor muscle strength and patient-reported outcomes. The differences be-
tween one year data and baseline data were compared between the PRT group
and the control group with 30sCST as primary outcome. Statistical analyses
were performed according to intention-to-treat.
Findings / Results:
15 patients were lost to one year follow- up. The PRT
group had significantly higher normalized knee extensor muscle strength (0.5
Nm/kg (0.4;0.6) vs. 0.2 Nm/kg (0.1;0.3), p=0.002) and higher normalized
knee flexor muscle strength (0.3 Nm/kg (0.2;0.4) vs. 0.2 Nm/kg (0.0;0.3),
p=0.042) in the operated leg compared to the control group leg. A borderline
significant group difference was found in regard to 30sCST (4.0 rep. (2.7;5.2)
vs. 2.3 (0.9;3.6), p=0.067).
Conclusions:
Supervised pre-operative PRT is an efficacious intervention for
improving long term effect on muscle strength and a borderline long-time ef-
fect on functional performance in patients undergoing TKA.
No conflicts of interest reported
19.