کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3447971 1595670 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of Treadmill Incline and Speed on Ankle Muscle Activity in Subjects After a Stroke
ترجمه فارسی عنوان
اثر تکرار و سرعت تردمیل بر فعالیت عضلانی مچ دست در افراد پس از سکته مغزی
موضوعات مرتبط
علوم پزشکی و سلامت پزشکی و دندانپزشکی پزشکی و دندانپزشکی (عمومی)
چکیده انگلیسی

ObjectivesTo examine the effects of walking on a treadmill at varying gradients and speeds on ankle muscle activation in stroke survivors, and to compare the effect of increasing speed on plantarflexor muscle activity in participants grouped according to spasticity severity.DesignWithin-subject and cross-sectional design. Participants walked on a standard treadmill at 3 different inclines (0°, 3°, 6°) and speeds (self-selected, self-selected+20%, self selected+40%).SettingUniversity laboratory.ParticipantsA convenience sample of stroke survivors (N=19; 13 men, 6 women) available in university clinics.InterventionsNot applicable.Main Outcome MeasuresElectromyographic activity of medial gastrocnemius (MG) and tibialis anterior (TA) muscles at push-off phase of the gait.ResultsParetic MG muscle activity increased (but TA did not change) at faster speeds irrespective of the incline (P<.05). In contrast, MG muscle activity increased at a higher incline in the nonparetic side (P<.05), but not in the paretic side (P>.05). In the high-spasticity subgroup (Tardieu Scale ≥2), paretic MG activity increased as walking speed increased (P=.004).ConclusionsStroke survivors appear to use distinct muscle activation strategies on the paretic and nonparetic sides in response to different walking speeds and inclines. Our data indicates that individuals with stroke can be safely trained on a treadmill to walk 20% to 40% above the self-selected pace to improve MG output without adversely affecting TA output. The speed-dependent characteristic of spasticity may help generate greater MG activity during push-off.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Archives of Physical Medicine and Rehabilitation - Volume 97, Issue 3, March 2016, Pages 445–453
نویسندگان
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