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COMPARATIVE STUDY
JOURNAL ARTICLE
Clinic-based assessment of weight-bearing asymmetry during squatting in people with anterior cruciate ligament reconstruction using Nintendo Wii Balance Boards.
OBJECTIVE: To use low-cost Nintendo Wii Balance Boards (NWBB) to assess weight-bearing asymmetry (WBA) in people who have undergone anterior cruciate ligament reconstruction (ACLR), and to compare their results with a matched control group.
DESIGN: Quantitative clinical study using a cross-sectional design.
SETTING: Orthopedic clinic of a private hospital.
PARTICIPANTS: ACLR participants (n=41; mean age ± SD, 26.0 ± 9.8 y; current Cincinnati sports activity level, 75.3 ± 19.8) performed testing in conjunction with their routine 6- or 12-month clinical follow-up, and a control group (n=41) was matched for age, height, body mass, and physical activity level.
INTERVENTIONS: Participants performed double-limb squats while standing on 2 NWBBs, 1 under each foot.
MAIN OUTCOME MEASURES: The WBA variables mean mass difference as a percentage of body mass, time favoring a single limb by >5% body mass, absolute symmetry index, and symmetry index relative to the operated or matched control limb were derived. Mann-Whitney U tests were performed to assess between-group differences.
RESULTS: Significant (P<.05) increases in asymmetry in the ACLR group were found for all outcome measures except symmetry index relative to the operated limb.
CONCLUSIONS: People who have undergone ACLR are likely to possess WBA during squats, and this can be assessed using low-cost NWBBs in a clinical setting. Interestingly, the observed asymmetry was not specific to the surgical limb. Future research is needed to assess the relationship between WBA early in the rehabilitation process and long-term outcomes.
DESIGN: Quantitative clinical study using a cross-sectional design.
SETTING: Orthopedic clinic of a private hospital.
PARTICIPANTS: ACLR participants (n=41; mean age ± SD, 26.0 ± 9.8 y; current Cincinnati sports activity level, 75.3 ± 19.8) performed testing in conjunction with their routine 6- or 12-month clinical follow-up, and a control group (n=41) was matched for age, height, body mass, and physical activity level.
INTERVENTIONS: Participants performed double-limb squats while standing on 2 NWBBs, 1 under each foot.
MAIN OUTCOME MEASURES: The WBA variables mean mass difference as a percentage of body mass, time favoring a single limb by >5% body mass, absolute symmetry index, and symmetry index relative to the operated or matched control limb were derived. Mann-Whitney U tests were performed to assess between-group differences.
RESULTS: Significant (P<.05) increases in asymmetry in the ACLR group were found for all outcome measures except symmetry index relative to the operated limb.
CONCLUSIONS: People who have undergone ACLR are likely to possess WBA during squats, and this can be assessed using low-cost NWBBs in a clinical setting. Interestingly, the observed asymmetry was not specific to the surgical limb. Future research is needed to assess the relationship between WBA early in the rehabilitation process and long-term outcomes.
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