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Surface electromyography analysis of three squat exercises

Surface electromyography analysis of three squat exercises

Monajati, Alireza, Larumbe-Zabala, Eneko, Goss-Sampson, Mark and Naclerio, Fernando ORCID: 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:https://doi.org/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
Uncontrolled Keywords: injury prevention, ACL, EMG, hamstring to quadriceps ratio, knee stability, female soccer players
Subjects: Q Science > QP Physiology
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Education & Health > Centre for Science and Medicine in Sport and Exercise
Faculty of Education & Health > Department of Life & Sports Sciences
Last Modified: 01 Aug 2019 08:27
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/21523

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