THE KINEMATIC DIFFERENCES of THREE TYPES of CROUCHED POSITIONS during A SPRINT START

Yo Chen, Kuang Ya Wu, Yu Ju Tsai, Wen Tien Yang, Jia Hao Chang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This study identifies the optimal crouched starting positions (elongated, medium, or bunched) from push-off to the first two steps. Seven elite sprinters were recruited as participants in this study (aged: 21±2 years). A high-speed camera (250Hz) was used to collect motion-based images on a sagittal plane. Kwon3D (software) was used to analyze the center of mass (COM) movement, step length, foot linear velocity, take-off angle, and trunk angle. Participants were tested in a 60m sprint for bunched, medium, and elongated starting positions. A one-way analysis of variance (ANOVA) (α=0.05) with repeated measures was performed to determine the difference in kinematics in the three crouched starting positions. The LSD comparison was applied to examine differences among pairs of means. Our results indicated that the medium starting position demonstrated a greater first step length and foot linear velocity when compared to the bunched starting position. In the first step toe-off, a lower COM vertical velocity was observed in the medium starting position when compared with the elongated starting position. This study concluded that the medium starting position was the ideal starting position.

Original languageEnglish
Article number1650099
JournalJournal of Mechanics in Medicine and Biology
Volume16
Issue number7
DOIs
Publication statusPublished - 2016 Nov 1

Fingerprint

High speed cameras
Takeoff
Analysis of variance (ANOVA)
Kinematics

Keywords

  • Center of mass
  • push-off
  • running

ASJC Scopus subject areas

  • Biomedical Engineering

Cite this

THE KINEMATIC DIFFERENCES of THREE TYPES of CROUCHED POSITIONS during A SPRINT START. / Chen, Yo; Wu, Kuang Ya; Tsai, Yu Ju; Yang, Wen Tien; Chang, Jia Hao.

In: Journal of Mechanics in Medicine and Biology, Vol. 16, No. 7, 1650099, 01.11.2016.

Research output: Contribution to journalArticle

@article{5ae33c33edc24146a55bd8b6b87b3696,
title = "THE KINEMATIC DIFFERENCES of THREE TYPES of CROUCHED POSITIONS during A SPRINT START",
abstract = "This study identifies the optimal crouched starting positions (elongated, medium, or bunched) from push-off to the first two steps. Seven elite sprinters were recruited as participants in this study (aged: 21±2 years). A high-speed camera (250Hz) was used to collect motion-based images on a sagittal plane. Kwon3D (software) was used to analyze the center of mass (COM) movement, step length, foot linear velocity, take-off angle, and trunk angle. Participants were tested in a 60m sprint for bunched, medium, and elongated starting positions. A one-way analysis of variance (ANOVA) (α=0.05) with repeated measures was performed to determine the difference in kinematics in the three crouched starting positions. The LSD comparison was applied to examine differences among pairs of means. Our results indicated that the medium starting position demonstrated a greater first step length and foot linear velocity when compared to the bunched starting position. In the first step toe-off, a lower COM vertical velocity was observed in the medium starting position when compared with the elongated starting position. This study concluded that the medium starting position was the ideal starting position.",
keywords = "Center of mass, push-off, running",
author = "Yo Chen and Wu, {Kuang Ya} and Tsai, {Yu Ju} and Yang, {Wen Tien} and Chang, {Jia Hao}",
year = "2016",
month = "11",
day = "1",
doi = "10.1142/S0219519416500998",
language = "English",
volume = "16",
journal = "Journal of Mechanics in Medicine and Biology",
issn = "0219-5194",
publisher = "World Scientific Publishing Co. Pte Ltd",
number = "7",

}

TY - JOUR

T1 - THE KINEMATIC DIFFERENCES of THREE TYPES of CROUCHED POSITIONS during A SPRINT START

AU - Chen, Yo

AU - Wu, Kuang Ya

AU - Tsai, Yu Ju

AU - Yang, Wen Tien

AU - Chang, Jia Hao

PY - 2016/11/1

Y1 - 2016/11/1

N2 - This study identifies the optimal crouched starting positions (elongated, medium, or bunched) from push-off to the first two steps. Seven elite sprinters were recruited as participants in this study (aged: 21±2 years). A high-speed camera (250Hz) was used to collect motion-based images on a sagittal plane. Kwon3D (software) was used to analyze the center of mass (COM) movement, step length, foot linear velocity, take-off angle, and trunk angle. Participants were tested in a 60m sprint for bunched, medium, and elongated starting positions. A one-way analysis of variance (ANOVA) (α=0.05) with repeated measures was performed to determine the difference in kinematics in the three crouched starting positions. The LSD comparison was applied to examine differences among pairs of means. Our results indicated that the medium starting position demonstrated a greater first step length and foot linear velocity when compared to the bunched starting position. In the first step toe-off, a lower COM vertical velocity was observed in the medium starting position when compared with the elongated starting position. This study concluded that the medium starting position was the ideal starting position.

AB - This study identifies the optimal crouched starting positions (elongated, medium, or bunched) from push-off to the first two steps. Seven elite sprinters were recruited as participants in this study (aged: 21±2 years). A high-speed camera (250Hz) was used to collect motion-based images on a sagittal plane. Kwon3D (software) was used to analyze the center of mass (COM) movement, step length, foot linear velocity, take-off angle, and trunk angle. Participants were tested in a 60m sprint for bunched, medium, and elongated starting positions. A one-way analysis of variance (ANOVA) (α=0.05) with repeated measures was performed to determine the difference in kinematics in the three crouched starting positions. The LSD comparison was applied to examine differences among pairs of means. Our results indicated that the medium starting position demonstrated a greater first step length and foot linear velocity when compared to the bunched starting position. In the first step toe-off, a lower COM vertical velocity was observed in the medium starting position when compared with the elongated starting position. This study concluded that the medium starting position was the ideal starting position.

KW - Center of mass

KW - push-off

KW - running

UR - http://www.scopus.com/inward/record.url?scp=84964054527&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84964054527&partnerID=8YFLogxK

U2 - 10.1142/S0219519416500998

DO - 10.1142/S0219519416500998

M3 - Article

AN - SCOPUS:84964054527

VL - 16

JO - Journal of Mechanics in Medicine and Biology

JF - Journal of Mechanics in Medicine and Biology

SN - 0219-5194

IS - 7

M1 - 1650099

ER -