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  • Title: Early maximal strength training is an efficient treatment for patients operated with total hip arthroplasty.
    Author: Husby VS, Helgerud J, Bjørgen S, Husby OS, Benum P, Hoff J.
    Journal: Arch Phys Med Rehabil; 2009 Oct; 90(10):1658-67. PubMed ID: 19801053.
    Abstract:
    UNLABELLED: Husby VS, Helgerud J, Bjørgen S, Husby OS, Benum P, Hoff J. Early maximal strength training is an efficient treatment for patients operated with total hip arthroplasty. OBJECTIVE: To compare muscle strength, work efficiency, gait patterns, and quality of life in patients undergoing total hip arthroplasty (THA) randomly assigned to either maximal strength training or a conventional rehabilitation program. DESIGN: A randomized controlled study. SETTING: Research laboratory, rehabilitation center, and physical therapy clinic. PARTICIPANTS: Patients (N=24) with osteoarthritis as the main reason for THA were randomly assigned to perform maximal strength training (n=12) or conventional rehabilitation (n=12). INTERVENTIONS: The maximal strength training group (STG) performed maximal strength training in leg press and abduction with the operated leg only 5 times a week for 4 weeks in addition to the conventional rehabilitation program. The conventional rehabilitation group (CRG) received supervised physical therapy 3 to 5 times a week for 4 weeks. MAIN OUTCOME MEASURES: 1-repetition maximum (1RM) leg press strength, 1RM abduction strength, rate of force development (RFD), work efficiency, gait patterns, and quality of life. RESULTS: 1RM increased in the bilateral leg press (P<.002) and in the operated leg separately (P<.002) in the STG compared with the CRG. 1RM abduction strength in the operated leg (P<.002) and the healthy leg (P<.002) increased in the STG compared with the CRG. RFD increased in the STG compared with the CRG (P(g)=.030), followed by a trend towards increased peak force in the STG (P(g)=.053) (P(g) = probability for differences between groups). Work efficiency tended to improve in the STG compared with the CRG (P=.065). No differences in gait patterns were revealed between the groups after the training intervention. CONCLUSIONS: Early maximal strength training 1 week postoperatively is feasible and an efficient treatment to regain muscular strength for patients who have undergone THA, demonstrated by a significantly larger increase in muscular strength and a trend towards a better work efficiency in the STG compared with the CRG.
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