کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7236109 | 1471091 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Training induced changes in quadriceps activation during maximal eccentric contractions
ترجمه فارسی عنوان
آموزش در طول حداکثر انقباضات غیرقطبی باعث تغییر در فعالیت چهارگانه شده شد
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کلمات کلیدی
مهار عصبی، انقباض عضلانی، تحریک آموزش،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
چکیده انگلیسی
Despite full voluntary effort, neuromuscular activation of the quadriceps group of muscles appears inhibited during eccentric contractions. A nerve stimulation protocol during dynamic contractions of the quadriceps was developed that employed triplets of supramaximal pulses to assess suppressed eccentric activation. Subsequently the effects of a short training intervention, performed on a dynamometer, on eccentric strength output and neural inhibition were examined. Torque-angular velocity (T-Ï) and experimental voluntary neural drive-angular velocity (%VA-Ï; %VA, obtained via the interpolated twitch technique) datasets, were obtained from pre- and post-training testing sessions. Non-linear regression fits of a seven parameter torque function and of a 3rd degree polynomial were performed on the pre- and post-training T-Ï and %VA-Ï datasets respectively. T-test showed a significant (pâ¯<â¯0.05) increase in the overall torque output post-training for the group, with three out of the six subjects demonstrating a significant (pâ¯<â¯0.05) increase in the torque output across the range of angular velocities as shown by the extra-sum-of-squares F-test. A significant increase (pâ¯<â¯0.05) in the %VA post-training was also observed as well as a reduction in the plateauing of the torque output during fast eccentric contractions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biomechanics - Volume 73, 17 May 2018, Pages 66-72
Journal: Journal of Biomechanics - Volume 73, 17 May 2018, Pages 66-72
نویسندگان
Dimitrios Voukelatos, Mathew Kirkland, Matthew T.G. Pain,