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· DOS Abstracts
One-year evaluation: Is there effect of 8 weeks
supervised progressive resistance training after
unicompartmental knee arthroplasty?
Peter Bo Jørgensen, Søren Bie Bogh, Signe Kierkegaard, Henrik Sørensen, Kjeld
Søballe, Inger Mechlenburg
Orthopaedic Research, Aarhus University Hospital; Center for Quality, Region
of Southen Denmark; Sports Science, Aarhus University
Background:
Muscle atrophy and decreased muscle strength is documented
in early stages of knee osteoarthritis and increases with progression. Within the
first weeks after Unicompartmental Knee Arthroplasty (UKA) an additional de-
crease in muscle strength is found. That is the rationale for early initiated resis-
tance training.
Purpose / Aim of Study:
To evaluate if there is effect of 8 weeks progressive
resistance training (PRT) after UKA assessed 1 year postoperative.
Materials and Methods:
53 patients (26 males), median age 66 years, sched-
uled for UKA were randomized to either 8 weeks supervised PRT (n=29) or 8
weeks standard home exercise (HE) program (n=24). PRT was initiated within
the first week after UKA and performed 2/week for 8 weeks in training ma-
chines. Preoperative assessment, 2-months and 1-year follow-up were per-
formed for leg press power, asymmetry in gait, walking speed and Knee injury
and Osteoarthritis Outcome Score (KOOS).
Findings / Results:
22 PRT and 18 HE-patients (73%) completed 1-year fol-
low-up and patients in the PRT group participated in mean 11 of 16 training ses-
sions. Leg press power increased from baseline to 1-year follow up (PRT: 29%
and HE: 30%, p<0.04 in both groups) and asymmetry was minimally changed
(PRT: 0,14% and HE: 0,29%) with no between-group difference (p>0.53 and
power >0.89). Walking speed (PRT: 16% and HE: 15%), KOOS symptoms (PRT:
21 point and HE: 15 point), KOOS pain (PRT: 38 point and HE: 32 point), KOOS
ADL (PRT: 29 point HE: 28 point) KOOS sport (PRT: 33 point and HE: 42 point),
KOOS QoL (PRT: 39 point and HE: 32 point) increased in both groups with no
between-group difference (p>0.42).
Conclusions:
We found no additional effect of an 8-week PRT program com-
pared to HE in this patient group when assessed one year after surgery.
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