下拉运动中背部肌肉激活的肌电图分析:握力变化和前臂方向的影响。

IF 2.5 Q1 SPORT SCIENCES
Andrea Buonsenso, Domenico Di Fonza, Gloria Di Claudio, Massimiliano Carangelo, Marco Centorbi, Alessandra di Cagno, Giuseppe Calcagno, Giovanni Fiorilli
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引用次数: 0

摘要

目标:拉下机是最通用的设备之一,背部加强,允许变化的抓地力和负荷。然而,关于运动方式和特定肌肉激活之间的关系,文献中存在明显的空白。方法:本研究检测了七种不同握力类型、宽度和躯干倾角的后期下拉运动中背部主要肌肉的肌电图活动。40名具有至少5年抗阻训练经验的男性受试者,以最大重复次数的70%进行5次下拉练习。在表面肌电分析之前,对分析的每个肌肉群进行最大随意收缩(MVC)测试,特别是背阔肌、后三角肌、肱二头肌、中下斜方肌和冈下肌。在完全运动、同心运动和偏心运动时,记录每块肌肉的肌电活动的标准化均方根。结果:多变量方差分析(MANOVA)显示,NrmsEMG肌激活在不同的后期下拉运动变化中无显著差异(p < 0.05)。在三角肌后部发现了显著的差异,与宽内旋握力(p = 0.011)和宽中性握力(p = 0.017)相比,宽内旋握力(躯干倾斜30°)表现出更大的肌电激活。结论:这些发现表明握力的变化可能不会显著改变背阔肌的招募,挑战了握力有效性针对背阔肌的假设。考虑到观察到的肌肉激活模式的可变性,研究结果强调了个性化运动选择方法的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Electromyographic Analysis of Back Muscle Activation During Lat Pulldown Exercise: Effects of Grip Variations and Forearm Orientation.

Objectives: The lat pulldown machine is one of the most versatile pieces of equipment for back strengthening, allowing variations in grip and load. However, there are significant gaps in the literature regarding the relationship between exercise modality and specific muscle activation. Methods: This study examined the electromyographic (EMG) activity of major back muscles during seven lat pulldown exercise variants that differed in grip type, width, and trunk inclination. Forty male subjects, with at least 5 years of resistance training experience, performed five repetitions of lat pulldown exercise using 70% of their repetition maximum. Prior to the surface EMG analysis, maximal voluntary contraction (MVC) tests were performed for each muscle group analysed, specifically the latissimus dorsi, posterior deltoid, brachial biceps, middle and lower trapezium, and infraspinatus. The normalised root mean square of the EMG (NrmsEMG) activity for each muscle was recorded during full, concentric, and eccentric movements. Results: Multivariate analysis of variance (MANOVA) showed no significant difference in the NrmsEMG muscle activation across the different lat pulldown exercise variations (all p > 0.05). A significant difference was found in the posterior deltoid where the wide-pronated grip with a 30° trunk inclination showed greater EMG activation compared to the wide pronated grip (p = 0.011) and wide neutral grip (p = 0.017). Conclusions: These findings suggest that grip variations may not significantly alter latissimus dorsi recruitment, challenging the assumption that grip effectiveness targets this muscle. The results highlight the need for individualised approaches to exercise selection, given the variability in muscle activation patterns observed.

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来源期刊
Journal of Functional Morphology and Kinesiology
Journal of Functional Morphology and Kinesiology Health Professions-Physical Therapy, Sports Therapy and Rehabilitation
CiteScore
4.20
自引率
0.00%
发文量
94
审稿时长
12 weeks
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