دورية أكاديمية
The Effect of Volitional Preemptive Abdominal Contraction on Biomechanical Measures During A Front Versus Back Loaded Barbell Squat
| العنوان: | The Effect of Volitional Preemptive Abdominal Contraction on Biomechanical Measures During A Front Versus Back Loaded Barbell Squat |
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| المؤلفون: | McCormick, Joseph B., Drusch, Alexander S., Lynch, Darragh J., Seeber, Gesine H., Wilford, Katherine F., Hooper, Troy L., Allen, Brad S., O’connell, Dennis G., Mena-Iturriaga, Maria J., Cooper, Kinyata J., Sizer, Phillip S. |
| المصدر: | McCormick , J B , Drusch , A S , Lynch , D J , Seeber , G H , Wilford , K F , Hooper , T L , Allen , B S , O’connell , D G , Mena-Iturriaga , M J , Cooper , K J & Sizer , P S 2023 , ' The Effect of Volitional Preemptive Abdominal Contraction on Biomechanical Measures During A Front Versus Back Loaded Barbell Squat ' , International Journal of Sports Physical Therapy , vol. 18 , no. 4 , pp. 831-844 . https://doi.org/10.26603/001c.84306Test |
| سنة النشر: | 2023 |
| المجموعة: | University of Groningen research database |
| مصطلحات موضوعية: | abdominal bracing, biomechanics, electromyography, spine, squat https://doi.orgTest |
| الوصف: | Background: Weightlifting is growing in popularity among recreational and competitive athletes. The barbell back squat (BackS) is commonly included in these training programs, while the barbell front squat (FrontS) is commonly performed as a component of other lifts such as the power clean or clean and jerk, it is less commonly practiced in isolation. Hypothesis/Purpose: The purpose of this study was to examine the effects of VPAC performance on trunk muscle and LE biomechanical responses during loaded BackS versus FrontS in healthy subjects. Study Design: Controlled Laboratory Study Methods: Healthy male subjects with the ability to perform a sub-maximal loaded barbell squat lift were recruited. Subjects completed informed consent, demographic/medical history questionnaires and an instructional video. Subjects practiced VPAC and received feedback. Surface electromyography (sEMG) electrodes and kinematic markers were applied. Muscles included were the internal oblique (IO), external oblique (EO), rectus abdominis, iliocostalis lumborum (ICL), superficial multifidi, rectus femoris, vastus lateralis, biceps femoris, and gluteus maximus. Maximal voluntary isometric contractions established reference sEMG values. A squat one-rep-max (1RM) was predicted by researchers using a three to five repetition maximum (3RM, 5RM) load protocol. Subjects performed BackS trials at 75% 1RM while FrontS trials were performed at 75% BackS weight, both with and without VPAC. Subjects performed three repetitions of each condition with feet positioned on two adjacent force plates. Significant interactions and main effects were tested using a 2(VPAC strategy) x 2(squat variation) and 2(VPAC strategy) x 2(direction) within-subject repeated measures ANOVAs. Tukey’s Post-Hoc tests identified the location of significant differences. Results: Trunk muscle activity was significantly higher during FrontS versus BackS regardless of VPAC condition. (IO: p=0.018, EO: p<0.001, ICL: p<0.001) VPAC increased performance time for both squat ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://research.rug.nl/en/publications/a5c48381-e0c1-460e-9298-dc0eba235548Test |
| DOI: | 10.26603/001c.84306 |
| الإتاحة: | https://doi.org/10.26603/001c.84306Test https://hdl.handle.net/11370/a5c48381-e0c1-460e-9298-dc0eba235548Test https://research.rug.nl/en/publications/a5c48381-e0c1-460e-9298-dc0eba235548Test https://pure.rug.nl/ws/files/862898543/84306-the-effect-of-volitional-preemptive-abdominal-contraction-on-biomechanical-measures-during-a-front-versus-back-loaded-barbell-squat.pdfTest http://www.scopus.com/inward/record.url?scp=85166768784&partnerID=8YFLogxKTest |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.6033A40E |
| قاعدة البيانات: | BASE |
| DOI: | 10.26603/001c.84306 |
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