Balance and isokinetic strength of lower limb muscles in professional female volleyball players with patellofemoral pain syndrome
Journal of Clinical Physiotherapy Research,
Vol. 7 No. 4 (2022),
1 October 2022
,
Page e74
https://doi.org/10.22037/jcpr.v7i4.44281
Abstract
Background and purpose: Patellofemoral pain syndrome (PFPS) is one of the prevalent musculoskeletal disorders of the knee, which subsequently causes joint changes in the knee. Investigating balance and muscle strength are among the things that can be considered in the evaluation of these people. The present study aimed to compare balance and lower limb muscle strength in female volleyball players with PFPS and healthy female volleyball players.
Materials and methods: In this cross-sectional study, 30 people (16 people with PFPS and 14 healthy people) with mean age of 24.33 years, height 178.72 cm, and weight 67.76 kg participated in this research. Biodex balance system was used to evaluate the balance as center of pressure (COP) displacement for anterior-posterior and medial-lateral directions in two open and closed-eye conditions. The evaluation of isokinetic strength of ankle, knee extensor, and hip abductor-external rotator muscles as peak torques and (PT) time-to-peak torque (TTPT) was measured by Cybex isokinetic dynamometer at a speed of 60 deg./s. The data were analyzed using an independent t-test to compare two healthy and PFPS groups in SPSS software at P<0.05
Results: The findings indicated that in patients with PFPS, the static balance in all tests conditions was significantly decreased in PFPS subjects compared to healthy ones (P<0.05). The strength of all evaluated muscles, except for the plantar flexor muscle group, was significantly lower in PFPS individuals compared with healthy ones (P<0.05).
Conclusion: The results demonstrated that static balance and muscle strength of lower limb in individuals with PFPS is weaker than in healthy ones, which can cause more injuries. Therefore, it is suggested that in the treatment and rehabilitation of this injury, strengthening the aforementioned factors should also be considered for these people.
- Patellofemoral pain syndrome
- Knee
- Static balance
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