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84462

Changes in Vertical and Leg Stiffness during Triple Jump Performance

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Last updated: 25 Dec 2024

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Abstract

Purpose: the aim of the present study to identify changes in vertical stiffness(K_vert) and leg stiffness 〖(K〗_leg) during triple jump and identify the relationship between both vertical and leg stiffness and horizontal velocity and the loss of horizontal velocity. Methods: Six male triple jumpers were videotaped during triple jump performance with three video cameras 60 Hz and the analysis was performed by DARTFISH TEAM PRO 4.5 software program, One-way repeated measure ANOVA was performed for each parameter. For the correlation analysis Pearson's correlation coefficients were used to examine the relationships between both (K_vertand〖 K〗_leg), and horizontal velocity and loss of horizontal velocity. Results:K_vertreached maximum value at hop (31.42 kN/m), then decreased consistently during step (25.83 kN/m) and jump (20.33 kN/m. Decrease in horizontal velocity during step and jump was 11.3 % and 13.4% respectively. On the other hand K_leg reaches a minimum value during hope (13.77 kN/m), then peaked at step phase (25.89 kN/m) and decreased during jump (16.97 kN/m). Conclusion: the results of the present study suggested that a higher K_vert values are necessary to maintain horizontal velocity and minimizing the loss of horizontal velocity during triple jump performance. And also K_leg plays an important role in maintaining horizontal velocity during step and jump but not in whole triple jump performance.

DOI

10.21608/jass.2015.84462

Keywords

Vertical and Leg Stiffness, Triple Jump

Authors

First Name

Abdel-Monaem

Last Name

Ibrahim Haridy

MiddleName

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Affiliation

Faculty of Physical Education for Boys, Alexandria University, Alexandria, Egypt

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First Name

Mohamed

Last Name

Abdel-Raouf Diab

MiddleName

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Affiliation

Faculty of Physical Education, Mansoura University, Mansoura, Egypt

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Orcid

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First Name

Osama

Last Name

Ismail El-Shaer

MiddleName

-

Affiliation

Faculty of Physical Education for Boys, Alexandria University, Alexandria, Egypt

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Orcid

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First Name

Moamen

Last Name

Mohamed Abdel-Gawad

MiddleName

-

Affiliation

Faculty of Physical Education for Boys, Alexandria University, Alexandria, Egypt

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Volume

5

Article Issue

1

Related Issue

12628

Issue Date

2015-03-01

Receive Date

2015-01-01

Publish Date

2015-03-01

Page Start

55

Page End

60

Print ISSN

2357-0024

Online ISSN

2357-0059

Article File

JASS_Volume 5_Issue 1_Pages 55-60.pdf

PDF . 663.3kB

Link

https://jassalexu.journals.ekb.eg/article_84462.html

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https://jassalexu.journals.ekb.eg/service?article_code=84462

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7

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Original Article

Type Code

1,203

Publication Type

Journal

Publication Title

Journal of Applied Sports Science

Publication Link

https://jassalexu.journals.ekb.eg/

MainTitle

Changes in Vertical and Leg Stiffness during Triple Jump Performance

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Article

Created At

22 Jan 2023