Digitalni repozitorijum
Univerziteta u Beogradu
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Quadriceps femoris cross-sectional area and specific leg strength: relationship between different muscles and squat variations
Којић, Филип
Abstract: Background. The aim was to determine the relationship between the cross-sectionalarea of the quadriceps femoris and strength performance in the deep and parallel barbellsquat.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 maximumand the body mass segments involved (calculated according to Dempster’s method).The cross-sectional area of the quadriceps femoris muscles was determined usingultrasound, while leg muscle mass was measured using the Bioelectrical Impedancemethod.Results. The cross-sectional areas of the three vastii muscles and leg muscle massshowed moderate to strong correlation with external load in both squat types (r=0.509–0.873). However, partial correlation (cross-sectional area of quadriceps femorismuscles were controlled) showed significant association only between leg muscle massand deep squat (r=0.64,p<0.05). The cross-sectional area of the vastus lateralisshowed a slightly higher correlation with external load in the parallel than in the deepsquat (r=0.67,p<0.01vs. r=0.59,p<0.05). The regression analysis extracted thevastus medialis cross-sectional area as the most important factor in manifesting strength(parallel squat:R2=0.569; deep squat:R2=0.499, bothp<0.01). The obtained resultssuggest that parallel squat strength depends mainly on the cross-sectional area of thevastii muscles, while it seems that the performance in the deep squat requires anadditional engagement of the hip and back extensor muscle groups.
https://peerj.com/articles/12435/
engleski
2021
Ovo delo je licencirano pod uslovima licence
Creative Commons CC BY-NC-ND 4.0 - Creative Commons Autorstvo - Nekomercijalno - Bez prerada 4.0 International License.
http://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
Keywords: Range of motion, External load, Bioelectrical impedance, Dempster’s method, Deepsquat, Parallel squat
10.7717/peerj.12435