Monajati, Alireza, Larumbe-Zabala, Eneko, Goss-Sampson, Mark ORCID: https://orcid.org/0000-0002-2662-559X and Naclerio, Fernando ORCID: https://orcid.org/0000-0001-7405-4894 (2019) Surface electromyography analysis of three squat exercises. Journal of Human Kinetics, 67 (1). pp. 73-83. ISSN 1640-5544 (Print), 1899-7562 (Online) (doi:10.2478/hukin-2018-0073)

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Abstract

The aim of this study was to perform an electromyography comparison of three commonly 28 used lower limb injury prevention exercises: a single-leg squat on a bench (SLSB), a double-leg squat (DLS) and a double-leg squat on a BOSU® 29 balance trainer (DLSB). After determining the 30 maximum isometric voluntary contraction of the hamstring and quadriceps, eight female athletes 31 performed 3 repetitions of each exercise, while electromyography activity of the biceps femoris 32 (BF), semitendinosus (ST), vastus lateralis (VL) and vastus medialis (VM) was monitored. 33 Comparisons between exercises revealed higher activation in BF (descending phase: p = 0.016, d = 34 1.36; ascending phase: p = 0.046, d = 1.11), ST (descending phase: p = 0.04, d = 1.87; ascending 35 phase: p = 0.04, d = 1.87), VL (ascending phase: p = 0.04, d = 1.17) and VM (descending phase: p 36 = 0.05, d = 1.11; ascending phase: p = 0.021, d = 1.133) muscles for the SLSB compared to the 37 DLSQ. Furthermore, higher muscular activation of the ST (ascending phase: p = 0.01, d = 1.51; 38 descending phase: p = 0.09, d = 0.96) and VM (ascending phase: p = 0.065, d = 1.03; descending 39 phase: p = 0.062, d = 1.05) during the SLSB with respect to the DLSB was observed. In conclusion, 40 the SLSB elicits higher neuromuscular activation in both hamstring and quadriceps muscles 41 compared to the other two analysed exercises. Additionally, the higher muscle activation of both 42 medial muscles (ST and VM) during the SLSB suggests that single leg squatting exercises may 43 enhance lower limb medial to lateral balance, and improve knee stability in the frontal plane.

Item Type:	Article
Additional Information:	© 2019 Alireza Monajati, Eneko Larumbe-Zabala, Mark Goss-Sampson, Fernando Naclerio, published by Sciendo. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0
Uncontrolled Keywords:	injury prevention, ACL, EMG, hamstring to quadriceps ratio, knee stability, female soccer players
Subjects:	Q Science > QP Physiology
Faculty / School / Research Centre / Research Group:	Faculty of Education, Health & Human Sciences Faculty of Engineering & Science Faculty of Education, Health & Human Sciences > School of Human Sciences (HUM) Faculty of Education, Health & Human Sciences > Institute for Lifecourse Development > Centre for Exercise Activity and Rehabilitation
Last Modified:	22 Nov 2021 11:49
URI:	http://gala.gre.ac.uk/id/eprint/21523

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