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Relationships between Hamstrings-to-Quadriceps Ratio and Variables Describing Countermovement and Drop Jumps
المؤلفون المشاركون
Struzik, Artur
Pietraszewski, Bogdan
المصدر
Applied Bionics and Biomechanics
العدد
المجلد 2019، العدد 2019 (31 ديسمبر/كانون الأول 2019)، ص ص. 1-6، 6ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2019-06-02
دولة النشر
مصر
عدد الصفحات
6
التخصصات الرئيسية
الملخص EN
The impact of the hamstrings-to-quadriceps ratio on sport movement performance has not been sufficiently described.
However, it seems that in movements involving eccentric-concentric muscular contractions, a higher hamstrings-to-quadriceps ratio should have a positive impact on human movement performance.
The present study is aimed at identifying relationships between the hamstrings-to-quadriceps ratio and variables describing countermovement and drop jumps.
The study was carried out in a group of 14 female soccer players.
The tests were conducted using a Kistler force plate, an SG electrogoniometer, and the Biodex System 4 Pro dynamometer.
Each player performed three countermovement jumps (CMJ) and three drop jumps (DJ) from heights of 15, 30, 45, and 60 cm.
The peak torques of knee extensors and flexors were measured in isometric conditions and in isokinetic conditions at angular velocities of 30o/s, 60o/s, 90o/s, and 120o/s.
Statistically significant relationships were found between the variables that describe CMJ, DJ 15, DJ 30, and hamstrings-to-quadriceps ratio at some, though not all, of the angular velocities measured.
No significant relationships were found between the hamstrings-to-quadriceps ratio and variables that describe DJ 45 and DJ 60.
The heights of CMJ, DJ 15, and DJ 30 were increased with higher hamstrings-to-quadriceps ratios.
Analogous relationships were found between the hamstrings-to-quadriceps ratio and relative mechanical power during the take-off phase of the CMJ.
Significant relationships between the hamstrings-to-quadriceps ratio and variables that describe vertical jump are likely to be observed if adequate angular velocity is used in the measurement of muscle torque.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Struzik, Artur& Pietraszewski, Bogdan. 2019. Relationships between Hamstrings-to-Quadriceps Ratio and Variables Describing Countermovement and Drop Jumps. Applied Bionics and Biomechanics،Vol. 2019, no. 2019, pp.1-6.
https://search.emarefa.net/detail/BIM-1114613
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Struzik, Artur& Pietraszewski, Bogdan. Relationships between Hamstrings-to-Quadriceps Ratio and Variables Describing Countermovement and Drop Jumps. Applied Bionics and Biomechanics No. 2019 (2019), pp.1-6.
https://search.emarefa.net/detail/BIM-1114613
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Struzik, Artur& Pietraszewski, Bogdan. Relationships between Hamstrings-to-Quadriceps Ratio and Variables Describing Countermovement and Drop Jumps. Applied Bionics and Biomechanics. 2019. Vol. 2019, no. 2019, pp.1-6.
https://search.emarefa.net/detail/BIM-1114613
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1114613
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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