Analysis of Muscle Strength and Electromyographic Activity during Different Deadlift Positions

IF 0.5 Q4 ORTHOPEDICS

MLTJ-Muscles Ligaments and Tendons Journal Pub Date : 2023-05-08 DOI:10.3390/muscles2020016

Vinícius Marques Moreira, L. Lima, A. Mortatti, Thiago M. F. Souza, F. V. Lima, S. Oliveira, C. E. Cabido, F. Aidar, M. Costa, Thiago Pires, Tatiana Acioli, R. Fermino, C. Assumpção, Túlio Banja

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引用次数: 0

Abstract

The aim of the study was to analyze muscle activation in the three positions of the deadlift (DL). Twenty male participants (33.4 ± 3.9 years; 42.2 ± 9.1 months of experience with DL; 91.0 ± 14.8 kg; and 1.78 ± 0.06 m) pulled a bar through isometric actions in three DL positions: lift-off, mid-pull, and lockout. Isometric strength, knee angle, and activation of the rectus femoris (RF), biceps femoris (BF), lateral gastrocnemius (GAL), and erector spinae (ERE) muscles were collected. The analysis of variance showed that the maximum isometric force presented differences between the positions (p = 0.001; η2 = 0.973) considered large with higher values at the mid-pull position. Interactions were found between muscles and position (p = 0.001; η2 = 0.527) considered large. The RF and ERE showed greater activation in the lift-off position, while in the mid-pull position, there was greater activation of the BF and GAL muscles. The DL positions produce different activations in the bi-articular and uni-articular muscles. The lift-off requires more activation from the RF and ERE positions. The mid-pull position, despite generating greater force, presented greater activations in the BF and GAL. The ERE showed higher activations as the external torque was greater.

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不同硬举姿势肌肉力量和肌电活动的分析

该研究的目的是分析硬举(DL)的三个位置的肌肉激活情况。男性20例(33.4±3.9岁);42.2±9.1个月DL经验;91.0±14.8 kg;(1.78±0.06 m)通过等距动作在三个DL位置上拉动杆:起跳、中拉和锁定。收集等长强度、膝关节角度和股直肌(RF)、股二头肌(BF)、腓肠肌外侧(GAL)和竖脊肌(ERE)的激活情况。方差分析表明，最大等距力在不同位置之间存在差异(p = 0.001;η2 = 0.973)认为较大，中拉位置值较高。肌肉和体位之间存在相互作用(p = 0.001;η2 = 0.527)被认为较大。RF和ERE在起跳位置表现出更大的激活，而在中拉位置，BF和GAL肌肉表现出更大的激活。DL位置在双关节和单关节肌肉中产生不同的激活。发射需要RF和ERE位置的更多激活。中拉位置，尽管产生更大的力，但在BF和GAL中表现出更大的激活。随着外部扭矩的增大，ERE表现出更高的激活。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

MLTJ-Muscles Ligaments and Tendons Journal ORTHOPEDICS-

CiteScore

1.30

自引率

0.00%

发文量

期刊介绍： MLTJ (Muscle, Ligaments and Tendons Journal) is an open access, peer-reviewed online journal that encompasses all aspects of clinical and basic research studies related to musculoskeletal, ligament, tendon, public health, exercise physiology and kinesiology issues. Muscle, Ligaments and Tendons Journal (MLTJ) provides the platform for exchange of new clinical and scientific information in the most precise and expeditious way to achieve timely dissemination of information and cross-fertilization of ideas. It is the official journal of the Italian Society of Muscles, Ligaments and Tendons (I.S.Mu.L.T.), Società Italiana Terapia con Onde D’urto (S.I.T.O.D.) and Società Italiana Studio Piede e Caviglia (S.I.S.P.E.C)