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AB1164-HPR Correlation of Dynamic Postural Control and Hip Muscle Strength
  1. A.P. Marques,
  2. A.P.M.C. Carvalho e Silva,
  3. G.P.L. Almeida,
  4. M.O. Magalhães
  1. Fisioterapia, Fonoaudiologia, Terapia Ocupacional, Universidade de São Paulo, São Paulo, Brazil

Abstract

Background Chondromalacia patellae is a common cause of anterior Knee pain, especially in young athletes or sedentary [1]. These individuals often have diminished muscle strength of the hip extensor, abductor, responsible for balance control during dynamic activities [2]. The pain and hip muscle weakness could alter dynamic postural control [3].

Objectives Correlated anterior-posterior and medial-lateral dynamic postural control with hip extensor and abductor muscle strength.

Methods This study examined 25 women with Chondromalacia patellae (CP) n=25; age 25,26 (6,6), weight 60,9 (10,2) and height 163 (8,0). Postural control was evaluated in a force platform NeuroCom Balance Master. The dynamic control was evaluated by the step up and down test in 20 cm step to assessed anterior-posterior and medial lateral displacement of the pressure of center (COP). The hand-held dynamometer was used to evaluate the isometric hip muscle strength, which was normalized with body weight. Pain was assessed with a visual analog scale (VAS) and function by the scale of activities of daily living (ADLS). The Pearson correlation was used to verify the relation between COP displacement and hip muscle strength, using the followed guide: <0.4 = lower; 0.4-0.7 = good; >0.7 = high correlation. A significance level was α=0.05.

Results There is a good positive correlation between anterior-posterior displacement of the COP and hip extensor strength in individual with chondromalacia patellae. The individuals show moderate pain 5.7 (1.6) and minimal functional disability 70.4 (7.5).

Table 1.

Correlation between displacements of the COP in dynamic postural control and hip isometric strength, during step up and down in individuals with chondromalacia patellae

Conclusions We observed a significant correlation between hip extensor and anterior-posterior showing the influence of the muscle strength in dynamic postural control. The positive relation may be by the activity chosen which need to move the center body forward. These results suggest the influence of the hip strength in dynamic postural control in individuals with chondromalacia patellae.

References

  1. Casscells SW. Chondromalacia of the patella. J Pediatr Orthop 1982;2:560–4.

  2. Prins MR, van der Wurff P. Females with patellofemoral pain syndrome have weak hip muscles: a systematic review. Aust J Physiother 2009;55:9-15

  3. Lee SP. Souza RB. Powers CM. The influence of hip abductor muscle performance on dynamic postural stability in females with patellofemoral pain. Gait Posture. 2012 Jul;36:425-9.

Disclosure of Interest None declared

DOI 10.1136/annrheumdis-2014-eular.2898

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