Quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations

Background The aim was to determine the relationship between the cross-sectional area of the quadriceps femoris and strength performance in the deep and parallel barbell squat. Methods The sample included 16 university students (seven female, 24.1 ± 1.7 years). Muscle strength was expressed as exter...

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Autores principales:	Filip Kojic, Saša Ðurić, Igor Ranisavljev, Stanimir Stojiljkovic, Vladimir Ilic
Formato:	article
Lenguaje:	EN
Publicado:	PeerJ Inc. 2021
Materias:	Range of motion External load Bioelectrical impedance Dempster’s method Deep squat Parallel squat Medicine R
Acceso en línea:	https://doaj.org/article/a64b8d2e86174d119a7cc5898bab7f8a
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spelling	oai:doaj.org-article:a64b8d2e86174d119a7cc5898bab7f8a2021-11-28T15:05:13ZQuadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations10.7717/peerj.124352167-8359https://doaj.org/article/a64b8d2e86174d119a7cc5898bab7f8a2021-11-01T00:00:00Zhttps://peerj.com/articles/12435.pdfhttps://peerj.com/articles/12435/https://doaj.org/toc/2167-8359Background The aim was to determine the relationship between the cross-sectional area of the quadriceps femoris and strength performance in the deep and parallel barbell squat. Methods The sample included 16 university students (seven female, 24.1 ± 1.7 years). Muscle strength was expressed as external load, including the one-repetition maximum and the body mass segments involved (calculated according to Dempster’s method). The cross-sectional area of the quadriceps femoris muscles was determined using ultrasound, while leg muscle mass was measured using the Bioelectrical Impedance method. Results The cross-sectional areas of the three vastii muscles and leg muscle mass showed moderate to strong correlation with external load in both squat types (r = 0.509–0.873). However, partial correlation (cross-sectional area of quadriceps femoris muscles were controlled) showed significant association only between leg muscle mass and deep squat (r = 0.64, p < 0.05). The cross-sectional area of the vastus lateralis showed a slightly higher correlation with external load in the parallel than in the deep squat (r = 0.67, p < 0.01 vs. r = 0.59, p < 0.05). The regression analysis extracted the vastus medialis cross-sectional area as the most important factor in manifesting strength (parallel squat: R2 = 0.569; deep squat: R2 = 0.499, both p < 0.01). The obtained results suggest that parallel squat strength depends mainly on the cross-sectional area of the vastii muscles, while it seems that the performance in the deep squat requires an additional engagement of the hip and back extensor muscle groups.Filip KojicSaša ÐurićIgor RanisavljevStanimir StojiljkovicVladimir IlicPeerJ Inc.articleRange of motionExternal loadBioelectrical impedanceDempster’s methodDeep squatParallel squatMedicineRENPeerJ, Vol 9, p e12435 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Range of motion External load Bioelectrical impedance Dempster’s method Deep squat Parallel squat Medicine R
spellingShingle	Range of motion External load Bioelectrical impedance Dempster’s method Deep squat Parallel squat Medicine R Filip Kojic Saša Ðurić Igor Ranisavljev Stanimir Stojiljkovic Vladimir Ilic Quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations
description	Background The aim was to determine the relationship between the cross-sectional area of the quadriceps femoris and strength performance in the deep and parallel barbell squat. Methods The sample included 16 university students (seven female, 24.1 ± 1.7 years). Muscle strength was expressed as external load, including the one-repetition maximum and the body mass segments involved (calculated according to Dempster’s method). The cross-sectional area of the quadriceps femoris muscles was determined using ultrasound, while leg muscle mass was measured using the Bioelectrical Impedance method. Results The cross-sectional areas of the three vastii muscles and leg muscle mass showed moderate to strong correlation with external load in both squat types (r = 0.509–0.873). However, partial correlation (cross-sectional area of quadriceps femoris muscles were controlled) showed significant association only between leg muscle mass and deep squat (r = 0.64, p < 0.05). The cross-sectional area of the vastus lateralis showed a slightly higher correlation with external load in the parallel than in the deep squat (r = 0.67, p < 0.01 vs. r = 0.59, p < 0.05). The regression analysis extracted the vastus medialis cross-sectional area as the most important factor in manifesting strength (parallel squat: R2 = 0.569; deep squat: R2 = 0.499, both p < 0.01). The obtained results suggest that parallel squat strength depends mainly on the cross-sectional area of the vastii muscles, while it seems that the performance in the deep squat requires an additional engagement of the hip and back extensor muscle groups.
format	article
author	Filip Kojic Saša Ðurić Igor Ranisavljev Stanimir Stojiljkovic Vladimir Ilic
author_facet	Filip Kojic Saša Ðurić Igor Ranisavljev Stanimir Stojiljkovic Vladimir Ilic
author_sort	Filip Kojic
title	Quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations
title_short	Quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations
title_full	Quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations
title_fullStr	Quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations
title_full_unstemmed	Quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations
title_sort	quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations
publisher	PeerJ Inc.
publishDate	2021
url	https://doaj.org/article/a64b8d2e86174d119a7cc5898bab7f8a
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Quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations

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