Sex-related differences in motor control strategies during isometric contractions in the Sorensen test posture with different external loading

被引:2
作者
Hinnekens, Simon [1 ]
Bara, Julie [2 ]
Scheen, Pauline [2 ]
Hidalgo, Benjamin [2 ,3 ,4 ]
机构
[1] Catholic Univ Louvain, Mechatron Elect Energy & Dynam Syst MEED, Inst Mech Mat & Civil Engn IMMC, Louvain, Belgium
[2] Catholic Univ Louvain, Fac Sci Motr, Louvain, Belgium
[3] Catholic Univ Louvain, Inst Expt & Clin Res IREC, Neuromusculoskeletal Lab NMSK, Brussels, Belgium
[4] Haute Ecole Leonard de Vinci, Dept Kinesitherapie, Brussels, Belgium
关键词
Electromyography; motor control; back muscles; sexual dimorphism; sorensen test; LOW-BACK-PAIN; QUADRATUS LUMBORUM; MUSCLE-ACTIVITY; ERECTOR SPINAE; LUMBAR; EMG; FATIGABILITY; ENDURANCE; STRENGTH; FATIGUE;
D O I
10.3233/BMR-220058
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
BACKGROUND: There is a sex-related difference in strength and endurance in trunk muscles: males have more strength while females have more endurance. OBJECTIVE: Investigate sex-related differences in motor control strategies in back muscles during isometric contractions (IC) in the Sorensen test posture. METHODS: Thirty-six healthy and young volunteers performed different tasks: three maximal voluntary contraction (MVC) tests recorded with a bio-feedback force sensor, and followed by five loaded IC (LIC) tests using bodyweight and loads of 0 to 8 kg with a 2-kg step. Surface electromyography was used to measure the activity of bilateral lumbar paravertebral (LP) and quadratus lumborum (QL) muscles. RESULTS: Sex-related and load-related differences in EMG amplitudes were highlighted during LIC tests. Females showed significantly (p-value = 0.02) greater EMG amplitude for the highest load (8 kg) than males. Besides, significant differences between low (2 and 4 kg) and high (6 and 8 kg) loads for both LP and QL muscles and for both sexes were observed. Finally, for MVC tests, males produced significantly (p-value = 1.02e-4) greater strength during MVC tests (4.25 +/- 1.37 N/kg vs 2.60 +/- 0.78 N/kg). CONCLUSION: The results were clinically relevant to bring attention to load strategy during rehabilitation, particularly in females who seemed to recruit the QL muscle more.
引用
收藏
页码:651 / 660
页数:10
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