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Relationship between lower limbs kinematic variables and effectiveness of sprint during maximum velocity phase

Artykuł
Czasopismo : Acta of Bioengineering and Biomechanics   Tom: 17, Zeszyt: 4, Strony: 131-138
Artur Struzik [1] , Grzegorz Konieczny [2] , Kamila Grzesik [3] , Mateusz Stawarz [3] , Sławomir Winiarski [4] , Andrzej Rokita [1]
2015 angielski
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Abstrakty ( angielski )
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Purpose: The aim of the study was to determine the relationshi ps between time of running over a 15–25 m section of a 30-meter r un along a straight line and changes in the angle and angular veloci ty observed in ankle, knee and hip joints. Therefore, the auth ors at- tempted to answer the question of whether a technique of lower limbs movement during the phase of sprint maximum velocity signi fi- cantly correlates with the time of runni ng over this section. Methods: A group of 14 young people from the Lower Silesia Voivod eship Team participated in the experiment. A Fu sion Smart Speed System was employed for r unning time measuremen ts. The kinematic data were recorded using Noraxon MyoMotion system. Results: There we re observed statistically signif icant relationships between spri nt time over a section from 15 to 25 m and left hip rotation (positive) and between this time and left and right ankle joint dorsi-plan tar flexion (negative). Conclusions: During the maximum ve locity phase of a 30 m sprint, the effect of dorsi-plantar flexion performed in t he whole range of motion was found to be beneficial. This can be attributed to the use of elastic energy released in the stride cycle. F urther, hip rotation should be minimized, whic h makes the stride aligned more along a line of running (a straight line) instead of from sid e to side.
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