Low-Back Pain and Knee Position–Related Differences on Postural Control Measures During a One-Legged Stance in Athletes

Context : Chronic low-back pain (CLBP) may be associated with changes in postural balance in athletes as poor postural control during sports practice. Objective : To compare the postural control of athletes with and without CLBP during 2 one-legged stance tasks and identify the center of pressure (C...

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Bibliographic Details
Published in:Journal of sport rehabilitation 2021-05, Vol.30 (4), p.631-637
Main Authors: Nowotny, Alexandre H., Calderon, Mariane Guizeline, Alves, Bruno Mazziotti O., de Oliveira, Marcio R., Andraus, Rodrigo A. de Carvalho, Aguiar, Andreo F., Amorim, Cesar F., Leonard, Guillaume, da Silva, Rubens A.
Format: Article
Language:English
Subjects:
Back pain
Balance
Knee
Posture
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Summary:Context : Chronic low-back pain (CLBP) may be associated with changes in postural balance in athletes as poor postural control during sports practice. Objective : To compare the postural control of athletes with and without CLBP during 2 one-legged stance tasks and identify the center of pressure (COP) cutoff values to determine the main differences. Designed : A cross-sectional study. Setting : Laboratory of functional evaluation and human motor performance. Participants : A total of 56 male athletes, 28 with and 28 without CLBP (mean age = 26 y). Intervention : The one-legged stance with knee extension and with the knee at 30° flexion tasks were measured and analyzed on a force platform. The participants completed three 30-second trials (30 s of rest between each trial). Main Outcome Measures : The COP parameters: the area of COP, mean COP sway velocity in both the anteroposterior and mediolateral directions, and total COP displacement were computed, and a receiver operating characteristics curve analysis was applied to determine the group differences. Results : Athletes with CLBP had poorer postural control ( P  7.1 cm 2 for the COP area, >2.6 cm/s for the COP sway velocity in the anterior-posterior direction, and >3.2 cm/s for the mediolateral direction. Whereas, the 30° knee flexion cutoffs were >10.9 cm 2 for the COP area, >2.9 cm/s for the COP sway velocity in the anterior-posterior direction, and >4.1 cm/s for the mediolateral direction. Both measures showed enough sensitivity and specificity (ie, area under the curve = 0.88 in and 0.80, respectively) to discriminate both groups. Conclusions : The athletes with CLBP had poorer postural control than the healthy athletes and obtained specific cutoff scores from the COP values.
ISSN:1056-6716
1543-3072
DOI:10.1123/jsr.2020-0095