کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5032531 | 1369985 | 2016 | 23 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effects of load carriage on joint work at different running velocities
ترجمه فارسی عنوان
اثرات حمل بار در کار مشترک در سرعت های مختلف در حال اجرا
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کلمات کلیدی
بیومکانیک، باربری، سینتیک، در حال اجرا
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
چکیده انگلیسی
Running with load carriage has become increasingly prevalent in sport, as well as many field-based occupations. However, the “sources” of mechanical work during load carriage running are not yet completely understood. The purpose of this study was to determine the influence of load magnitudes on the mechanical joint work during running, across different velocities. Thirty-one participants performed overground running at three load magnitudes (0%, 10%, 20% body weight), and at three velocities (3, 4, 5 m/s). Three dimensional motion capture was performed, with synchronised force plate data captured. Inverse dynamics was used to quantify joint work in the stance phase of running. Joint work was normalized to a unit proportion of body weight and leg length (one dimensionless work unit=532.45 J). Load significantly increased total joint work and total positive work and this effect was greater at faster velocities. Load carriage increased ankle positive work (β coefficient=rate of 6.95Ã10â4 unit work per 1% BW carried), and knee positive (β=1.12Ã10â3 unit) and negative work (β=â2.47Ã10â4 unit), and hip negative work (β=â7.79Ã10â4 unit). Load carriage reduced hip positive work and this effect was smaller at faster velocities. Inter-joint redistribution did not contribute significantly to altered mechanical work within the spectrum of load and velocity investigated. Hence, the ankle joint contributed to the greatest extent in work production, whilst that of the knee contributed to the greatest extent to work absorption when running with load.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 49, Issue 14, 3 October 2016, Pages 3275-3280
Journal: Journal of Biomechanics - Volume 49, Issue 14, 3 October 2016, Pages 3275-3280
نویسندگان
Bernard X.W. Liew, Susan Morris, Kevin Netto,