تجاوز إلى المحتوى الرئيسي
User Image

عبدالعزيز بن عبدالرحمن الدايل

Assistant Professor

عضو هيئة تدريس

كلية علوم الرياضة والنشاط البدني
كلية علوم الرياضة والنشاط البدني - قسم فسيولوجيا الجهد البدني
المنشورات
مقال فى مجلة
2010

Comparison between alternating and pulsed current electrical muscle stimulation for muscle and systemic acute responses

A, Aldayel . 2010

This study compared alternating current and pulsed current electrical muscle stimulation (EMS) for torque output, skin temperature (Tsk), blood lactate and hormonal responses, and skeletal muscle damage markers. Twelve healthy men (23-48 yr) received alternating current EMS (2.5 kHz delivered at 75 Hz, 400 micros) for the knee extensors of one leg and pulsed current (75 Hz, 400 micros) for the other leg to induce 40 isometric contractions (on-off ratio 5-15 s) at the knee joint angle of 100 degrees (0 degrees: full extension). The use of the legs for each condition was counterbalanced among subjects, and the two EMS bouts were separated by 2 wk. The current amplitude was consistently increased to maximally tolerable level, and the torque and perceived intensity were recorded over 40 isometric contractions. Tsk of the stimulated and contralateral knee extensors were measured before, during, and for 30 min after EMS. Blood lactate, growth hormone, testosterone, insulin-like growth factor 1, testosterone, and cortisol were measured before, during, and for 45 min following EMS. Muscle damage markers included maximal voluntary isometric contraction torque, muscle soreness with a 100-mm visual analog scale, and plasma creatine kinase (CK) activity, which were measured before and 1, 24, 48, 72, and 96 h after EMS. No significant differences in the torque induced during stimulation (approximately 30% maximal voluntary isometric contraction) and perceived intensity were found, and changes in Tsk, blood lactate, and hormones were not significantly different between conditions. However, all of the measures showed significant (P<0.05) changes from baseline values. Skeletal muscle damage was evidenced by prolonged strength loss, development of muscle soreness, and increases in plasma CK activity; however, the changes in the variables were not significantly different between conditions. It is concluded that acute effects of alternating and pulsed current EMS on the stimulated muscles are similar.

نوع عمل المنشور
Original Article
رقم المجلد
109
رقم الانشاء
3
مجلة/صحيفة
Journal of Applied Physiology
الصفحات
735-44
مزيد من المنشورات
publications

ضمن ​سلسلة علمية دورية تصدر عن التحاد السعودي للتربية البدنية والرياضة للجميع، تتناول موضوعات متنوعة في مجالت التربية البدنية وعلوم الرياضة، ويعدها مجموعة من المختصصين.

بواسطة عبدالعزيز الدايل
2017
تم النشر فى:
التحاد السعودي للتربية البدنية والرياضة للجميع
publications

INTRODUCTION: Neuromuscular electrical stimulation (NMES) can be delivered over a muscle belly (mNMES) or nerve trunk (nNMES). Both methods generate contractions that fatigue rapidly due, in part…

بواسطة Lou JW, Bergquist AJ, Aldayel A, Czitron J, Czitron J
2016
publications

Electrical stimulation (ES) induces muscle damage that is characterised by histological alterations of muscle fibres and connective tissue, increases in circulating creatine kinase (CK) activity,…

بواسطة Nosaka K, Aldayel A, Jubeau M, Chen TC
2011