نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی دکتری آسیب‌شناسی و حرکات اصلاحی، دانشگاه خوارزمی
2 دانشیار آسیب‌شناسی و حرکات اصلاحی، دانشگاه خوارزمی
3 استاد فیزیوتراپی، دانشگاه علوم پزشکی ایران
4 دانشیار طب ورزشی، دانشگاه شهید رجایی تهران
5 استاد بیومکانیک، دانشگاه صنعتی شریف
چکیده
مطالعة حاضر با هدف بررسی تأثیرپذیری پارامترهای کینتیکی و کینماتیکی ورزشکاران از راهنمایی به گام‌برداری، با افزایش هیل‌استرایک انجام شد.این مطالعة مورد-شاهدی روی 13 ورزشکار مرد در دو وضعیت گام‌برداری عادی و گام‌برداری با افزایش هیل‌استرایک انجام گردید. دامنة حرکتی، گشتاور مفاصل و نیروی عمودی عکس‌العمل زمین، با دستگاه آنالیز حرکت وایکون و صفحه‌نیروی کیسلر انجام شد. نتایج نشان داد که افزایش هیل‌استرایک در مقایسه با الگوی معمول، باعث کاهش معنادار زاویة فلکشن زانو در لحظة تماس پاشنه با زمین و فاز استقرار، کاهش میانگین گشتاور چرخش خارجی و اداکتوری زانو می‌شود. به‌علاوه، دورسی‌فلکشن مچ پا در فاز میانی استقرار با افزایش هیل‌استرایک در مقایسه با الگوی معمول بیشتر بود؛ بنابراین، شاید گام‌برداری با افزایش هیل‌استرایک، بارگذاری مکانیکال مفصل زانو را کاهش دهد و مهم‌ترآنکه، کشش‌پذیری عضلة گاستروسولئوس را فراهم کند.
کلیدواژه‌ها
عنوان مقاله [English]
Effect of Increased Heel Strike During Gait on Selected Kinematic and kinetic Features of Ankle and Knee Joints in Athletes
نویسندگان [English]
- Farhad Rezazadeh 1
- Seyed Sadreddin Shojaeddin 2
- Esmaeil Ebrahimi 3
- Amir Hosein Barati 4
- Farzam Farahmand 5
1 Ph.D. Student of Corrective Exercises and Sports Injuries, Kharazmi University
2 Associate Professor of Corrective Exercises and Sports Injuries, Kharazmi University
3 Professor of Physiotherapy, Iran University of Medical Sciences
4 Associate Professor of Sport Medicine, Shahid Rajaee Teacher Training University of Tehran
5 Professor of Biomechanic, Sharif University of Technology
چکیده [English]
The present study was done to evaluate the effectiveness of some kinetic and kinematic features of healthy athletes during increased heel strike pattern. This case-control study was carried out on 13 professional healthy male athletes in two positions of normal and increased heel strike gait patterns. Range of motion, knee and ankle joint torque and vertical ground reaction force measured by the Kistler and Vicon motion analysis system. Results showed that increased heel strike compare to normal level walking caused significantly reduced knee flexion angle at the moment of heel contact and stance phase, mean values of external rotational and adductor knee moments. In addition, increased ankle dorsiflexion during midstance was significantly high in increase heel strike pattern compare to usual pattern. It seems that increased heel strike pattern decreases knee mechanical loading and more importantly, increasing elasticity of gastrocnemius-soleus muscles provided by heel strike pattern.
کلیدواژه‌ها [English]
- Gait Analysis
- Kinetic
- Kinematic
- Ankle
- Knee
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