Analysis of Muscle Strength and Electromyographic Activity during Different Deadlift Positions

Author:

Moreira Vinícius Marques1,Lima Leonardo Coelho Rabello de2ORCID,Mortatti Arnaldo Luis3ORCID,Souza Thiago Mattos Frota de4,Lima Fernando Vitor5,Oliveira Saulo Fernandes Melo6,Cabido Christian Emmanuel Torres7ORCID,Aidar Felipe J.89ORCID,Costa Manoel da Cunha10ORCID,Pires Thiago1,Acioli Tatiana11,Fermino Rogério César1213ORCID,Assumpção Cláudio Oliveira14ORCID,Banja Túlio1

Affiliation:

1. Institute of Physical Education and Sports, Federal University of Ceará, Fortaleza 60020-181, Brazil

2. School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040-900, Brazil

3. Graduate Program in Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil

4. Applied Kinesiology Laboratory—LCA, School of Physical Education, University of Campinas, Campinas 13083-959, Brazil

5. Weight Training Laboratory, School of Physical Education, Physiotherapy and Occupational Therapy, Federal University of Minas Gerais, Belo Horizonte 31270-901, Brazil

6. Physical Education Graduate Program, Vitória Academic Center, Federal University of Pernambuco, Recife 50800-220, Brazil

7. Postgraduate Program in Physical Education Program in Physical Education, Department of Physical Education, Laboratory of the Physical Exercise Research Group: Health and Human Performance, Federal University of Maranhão, São Luís 65080-805, Brazil

8. Department of Physical Education, Federal University of Sergipe, São Cristóvão 49100-000, Brazil

9. Graduate Program Association of Physical Education, Federal University of Paraíba, João Pessoa 58051-900, Brazil

10. Human Performance Laboratory, State University of Pernambuco, Recife 50100-010, Brazil

11. UNIFBV—University Center, Recife 51200-060, Brazil

12. Research Group in Environment, Physical Activity, and Health, Postgraduate Program in Physical Education, Federal University of Technology—Paraná, Curitiba 80230-901, Brazil

13. Postgraduate Program in Physical Education, Federal University of Paraná, Curitiba 81530-900, Brazil

14. Exercise Science, Health and Human Performance Research Group, Department of Sport Sciences, Institute of Health Sciences, Federal University of Triângulo Mineiro, Uberaba 38025-350, Brazil

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.

Publisher

MDPI AG

Reference29 articles.

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