جمعه 17 مرداد 1404
چکیده: (41 مشاهده)
Background: Evaluating muscle activation patterns such as co-contraction and frequency content can help clinicians assess neuromuscular changes during gait rehabilitation in people with pronated feet. This research examined the impact of double-density insoles on muscular co-activation and the frequency characteristics during gait in individuals with flat feet, in comparison to those with a neutral foot alignment.
Methods: Twenty males with pronated feet and 20 controls with normal feet participated. Muscle activity was recorded using surface electromyography (sEMG) at 1000 Hz while participants walked over an 18-meter walkway with and without foot orthoses. Co-contraction was calculated as 1 – (antagonist mean sEMG / agonist mean sEMG). Muscular frequency content was analysed at stance sub-phase.
Findings: Group-by-condition interaction was significant for knee flexor/extensor co-contraction at mid-stance, with post-hoc analysis showing increased co-contraction in the normal foot group when using orthoses. Interactions were significant for tibialis anterior, vastus lateralis, rectus femoris, biceps femoris, semitendinosus, and gluteus medius at propulsion. Post-hoc tests revealed increased activity in these muscles in foot group when wearing orthoses.
Conclusion: Foot orthoses did not change knee flexor/extensor co-contraction in the pronated feet group during the mid-stance. Foot orthoses improved muscular frequency content in the pronated feet group while walking.
Methods: Twenty males with pronated feet and 20 controls with normal feet participated. Muscle activity was recorded using surface electromyography (sEMG) at 1000 Hz while participants walked over an 18-meter walkway with and without foot orthoses. Co-contraction was calculated as 1 – (antagonist mean sEMG / agonist mean sEMG). Muscular frequency content was analysed at stance sub-phase.
Findings: Group-by-condition interaction was significant for knee flexor/extensor co-contraction at mid-stance, with post-hoc analysis showing increased co-contraction in the normal foot group when using orthoses. Interactions were significant for tibialis anterior, vastus lateralis, rectus femoris, biceps femoris, semitendinosus, and gluteus medius at propulsion. Post-hoc tests revealed increased activity in these muscles in foot group when wearing orthoses.
Conclusion: Foot orthoses did not change knee flexor/extensor co-contraction in the pronated feet group during the mid-stance. Foot orthoses improved muscular frequency content in the pronated feet group while walking.
نوع مطالعه: پژوهشي |
موضوع مقاله:
آسیب شناسی ورزشی و حرکات اصلاحی
دریافت: 1403/8/28 | پذیرش: 1404/4/22
دریافت: 1403/8/28 | پذیرش: 1404/4/22
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