| Title: | Countermovement jump in female sprinters : kinetic parameters and asymmetry |
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| Authors: | ID Prvulović, Nikola (Author)
ID Čoh, Milan (Author)
ID Čular, Dražen (Author)
ID Tomljanović, Mario (Author)
ID Sporiš, Goran (Author)
ID Žilič Fišer, Suzana (Author) |
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| Files: |  RAZ_Prvulovic_Nikola_2022.pdf (277,80 KB)
MD5: 72DC787F1FA4E24DEF481ACA0CC92B28
 https://www.mdpi.com/2073-8994/14/6/1130
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FERI - Faculty of Electrical Engineering and Computer Science
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| Abstract: | Analyzing asymmetry from biomechanical parameters of the lower extremities has become a standard practice for accurate assessment of athletic performance, injury prevention, and
rehabilitation. The aims of this study were (1) to determine differences between explosive strength
and asymmetry of the lower extremities using kinetic parameters of the CMJ jump test in young
female athletics, and (2) to investigate correlation between speed and asymmetry, as speed and
kinetic parameters. The two groups of nine female sprinters (mean ± SD; G1-age 15.6 ± 1.34 years,
height 170.1 ± 0.57 cm, body mass 62.54 ± 7.73 kg, and BMI 21.6 ± 2.05; G2-age 16.2 ± 1.3 years,
height 168.4 ± 0.61 cm, body mass 57.69 ± 3.12 kg, and BMI 20.37 ± 1.38) performed the CMJ test
without using an arm swing, as well as a 100 m test. Two tensiometric platforms were used for the
kinetic parameters and asymmetry. Asymmetry was calculated by an AI equation, and the values of
the takeoff velocities and jump height parameters were obtained by integral formula and the trapezoidal rule of impulse-momentum methods. The results show differences in four kinetic parameters:
height (G1- 26.82 ± 3.56 cm, vs. G2- 17.45 ± 2.01 cm), concentric impulse, (G1- 96.05 ± 16.95 N·s, vs.
G2- 68.41 ± 4.77 N·s), takeoff velocity, (G1- 2.29 ± 0.14 m/s, vs. 1.83 ± 0.12 m/s), and concentric
velocity, m/s (G1- 1.5 ± 0.175 m/s, vs. 1.17 ± 0.122 m/s), as well as a negative strong and very
strong correlation between asymmetry and kinetic parameters for three parameters: Peak Force
(G1- r = −0.878, and all subjects r = −0.633), Eccentric Impulse of left leg (G1- r = −0.865) and
Concentric Impulse of right leg (G2- r = −0.878), (p <.05). The younger sprinters did not show the
principle of muscle activation in the form of a longer preparatory phase of contact time, eccentric
and concentric phase, as well as a force impulse that is optimal. There was no correlation between
asymmetry and sprint performance. |
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| Keywords: | asymmetry, kinetics, explosive strength, sprint, athletics |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 29.04.2022 |
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| Article acceptance date: | 27.05.2022 |
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| Publication date: | 31.05.2022 |
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| Publisher: | MDPI AG |
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| Year of publishing: | 2022 |
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| Number of pages: | str. 1-10 |
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| Numbering: | Vol. 14, no. 6, art. 1130 |
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| PID: | 20.500.12556/DKUM-92360  |
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| UDC: | 796.01 |
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| ISSN on article: | 2073-8994 |
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| COBISS.SI-ID: | 110037251 |
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| DOI: | 10.3390/sym14061130 |
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| Copyright: | © 2022 by the authors |
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| Publication date in DKUM: | 01.04.2025 |
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| Views: | 138 |
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| Downloads: | 9 |
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| Metadata: |    |
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| Categories: | Misc.
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