نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه بیومکانیک و آسیب‌شناسی ورزشی، دانشکده تربیت‌بدنی و علوم ورزشی، دانشگاه خوارزمی، تهران، ایران.
2 گروه بیومکانیک و آسیب‌شناسی ورزشی، دانشکده تربیت‌بدنی و علوم ورزشی، دانشگاه خوارزمی، تهران، ایران. و گروه بیومکانیک ورزشی و توانبخشی، پژوهشکده علوم حرکتی، دانشگاه خوارزمی، تهران، ایران.
3 گروه بیومکانیک ورزشی، دانشکده تربیت‌بدنی و علوم ورزشی، دانشگاه بیرجند، بیرجند، ایران.
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and Aims Chronic ankle instability (CAI) is one of the most common sports injuries. The failure of treatment methods suggests that the mechanisms of this injury should be examined as a central impairment. Analyzing the phases of gait initiation is the safest option to assess neuromuscular control mechanisms, as the duration of anticipatory and compensatory postural adjustment phases has not been studied much. Therefore, this study aimed to compare the duration of anticipatory and compensatory postural adjustments (CPA) during gait initiation between individuals with CAI and healthy individuals.
Methods Nineteen individuals with CAI (9 women and 10 men; mean age: 21.21±1.98 years, mean height: 175.31±9.10 cm, and mean weight: 70.89±15.12 kg) with a history of at least two ankle sprains in the past 3 to 12 months, and 19 healthy athletes (9 women and 10 men; mean age: 22.47±2.19 years, mean height: 175.31±9.10 cm, and mean weight: 68.47±10.11 kg) participated in this study. Participants stood on a force plate and initiated walking upon hearing an auditory cue. The duration of the gait initiation phase and the anticipatory and compensatory postural adjustment phases were calculated using MATLAB software. The independent t-test was used to compare the duration of the gait initiation phase between the groups. Multivariate analysis of variance was used to compare the overall duration of the anticipatory and compensatory postural adjustment phases, and the Tukey post hoc test was applied for a detailed analysis of these phases.
Results The findings showed that the duration of the gait initiation phase in the CAI group was shorter than in the healthy group (P=0.018). Additionally, the duration of anticipatory postural adjustment in the CAI group was significantly shorter than in the healthy group (P=0.009). However, no significant difference was observed between the two groups in the duration of the compensatory postural adjustment phase (P=0.15).
Conclusion These findings indicate that individuals with CAI demonstrate altered strategies in neuromuscular control, particularly in supraspinal pathways, as evidenced by the reduced duration of the anticipatory postural adjustments (APA) and gait initiation phases. The unaffected compensatory postural adjustment phase duration in individuals with CAI may result from motor learning and prior experience utilizing compensatory mechanisms in critical situations.
کلیدواژه‌ها [English]
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