Alizadeh R, Jafarnezhadgero A, Khezri D. The acute effect of using anti-pronation insoles on the frequency content of lower limb muscles in individuals with anterior cruciate ligament reconstruction with pronated feet during the stance phase of walking. IJRN 2024; 10 (4) :1-8
URL:
http://ijrn.ir/article-1-827-en.html
Associate Prof., Dept. of Sport Biomechanics, Faculty of Educational Sciences and Psychology, University of Mohaghegh Ardabili, Ardabil, Iran
Abstract: (295 Views)
Introduction: Anterior cruciate ligament reconstruction (ACLR) is a common treatment method used after ACL injuries. Patients undergo ACLR to return to their active lifestyles. However, returning to their previous activity level may result in a retear of their reconstructed knee or an injury to their contralateral anterior cruciate ligament. Therefore, the purpose of this study was to evaluate the acute effect of using anti pronation insoles on muscle frequency content in individuals with ACLR and pronated feet during walking
Methods: This study was semi-experimental and laboratory based. The sample consisted of 13 healthy males and 13 males with ACLR and pronated feet. A bipolar EMG system with 8 pairs of electrodes was used to record the activity of the tibialis anterior, medial gastrocnemius, vastus medius, vastus lateralis, rectus femoris, biceps femoris, semitendinosus and gluteus medius during walking with and without antipronation foot orthoses. Muscular median frequency during loading, mid-stance, and push-off phases were used for further analysis. Two-way ANOVA with repeated measures was used for statistical analysis.
Results: The results indicated that the ACLR group with pronated feet had higher median frequency in the rectus femoris (p=0.004) and medial gastrocnemius (P=0.017) during the loading phase compared to the healthy group. Additionally, the results showed that the frequency content of the vastus lateralis during the mid-stance phase was higher with foot orthoses compared to without (p=0.002). However, there was no change in the frequency content of this muscle in the ACLR group with pronated feet after using foot orthoses (p>0.05).
Conclusion: The quadriceps muscles have eccentric contractions during the loading phase. It appears that individuals with both ACLR and pronated feet use an increased median frequency of the rectus femoris as a compensatory mechanism for improved shock absorption. The use of foot orthoses has limited effects on muscular frequency content in individuals with both ACLR and pronated feet.
Type of Study:
Research |
Received: 2023/06/13 | Accepted: 2024/01/24 | Published: 2024/07/27