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Effect of limb dominance on lower ex...

Spencer, Jennifer A.

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Effect of limb dominance on lower extremity biomechanics when landing from a jump.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Effect of limb dominance on lower extremity biomechanics when landing from a jump./
Author:	Spencer, Jennifer A.
Description:	38 p.
Notes:	Source: Masters Abstracts International, Volume: 55-01.
Contained By:	Masters Abstracts International55-01(E).
Subject:	Kinesiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1526726
ISBN:	9781339095998

Effect of limb dominance on lower extremity biomechanics when landing from a jump.
Spencer, Jennifer A.

Effect of limb dominance on lower extremity biomechanics when landing from a jump. - 38 p.

Source: Masters Abstracts International, Volume: 55-01.

Thesis (M.S.)--California State University, Fullerton, 2015.

Many sports involve landing activities, which can produce large forces that must be absorbed by the lower extremity joints. Ankle injuries are more common, but knee injuries are typically more severe and require a longer recovery period. Most sport-related non-contact ACL injuries occur during landing, and may be due to abnormal lower extremity biomechanics or imbalances in the dominant and non-dominant limb. Abnormal loading of one particular limb could lead to un-natural forces being absorbed at the joints of the loaded and/or unloaded limb. The purpose was to determine if imbalances exist in the joint mechanics between the dominant and non-dominant limb when landing from a drop. We hypothesized that the dominant limb would have hip and knee mechanics less prone to injury, while the non-dominant limb would be weaker and therefore more prone to injury. Subjects included thirty healthy males and females, each of which performed ten drop jump tasks; five leading off with the right foot and five leading off with the left foot. Results indicated that there were significant interactions among the right step off for the peak knee valgus and peak knee flexion moments between the dominant and non-dominant limb; the left step off peak hip flexion moment between the dominant and non-dominant limb; and between the dominant and non-dominant limb in the peak vertical ground reaction forces for both right step off and the left step off. Greater knee valgus during landing was found in the dominant limb, and may indicate that the dominant limb of both males and females are more prone to ACL injury. Compensations, in the form of greater knee flexion in the dominant limb and greater hip flexion in the non-dominant limb, may be taking place to protect the ACL of the dominant limb. Greater ground reaction forces seemed to be found in the limb used to step down with, which may indicate that the limb to first make contact must absorb greater GRF and therefore could have a greater injury potential. In conclusion, asymmetries do exist between the dominant and non-dominant limb and may provide insight into injury prevention.

ISBN: 9781339095998Subjects--Topical Terms:

517627
Kinesiology.

Effect of limb dominance on lower extremity biomechanics when landing from a jump.
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245 1 0 $a Effect of limb dominance on lower extremity biomechanics when landing from a jump.
300 $a 38 p.
500 $a Source: Masters Abstracts International, Volume: 55-01.
500 $a Adviser: Scott Lynn.
502 $a Thesis (M.S.)--California State University, Fullerton, 2015.
520 $a Many sports involve landing activities, which can produce large forces that must be absorbed by the lower extremity joints. Ankle injuries are more common, but knee injuries are typically more severe and require a longer recovery period. Most sport-related non-contact ACL injuries occur during landing, and may be due to abnormal lower extremity biomechanics or imbalances in the dominant and non-dominant limb. Abnormal loading of one particular limb could lead to un-natural forces being absorbed at the joints of the loaded and/or unloaded limb. The purpose was to determine if imbalances exist in the joint mechanics between the dominant and non-dominant limb when landing from a drop. We hypothesized that the dominant limb would have hip and knee mechanics less prone to injury, while the non-dominant limb would be weaker and therefore more prone to injury. Subjects included thirty healthy males and females, each of which performed ten drop jump tasks; five leading off with the right foot and five leading off with the left foot. Results indicated that there were significant interactions among the right step off for the peak knee valgus and peak knee flexion moments between the dominant and non-dominant limb; the left step off peak hip flexion moment between the dominant and non-dominant limb; and between the dominant and non-dominant limb in the peak vertical ground reaction forces for both right step off and the left step off. Greater knee valgus during landing was found in the dominant limb, and may indicate that the dominant limb of both males and females are more prone to ACL injury. Compensations, in the form of greater knee flexion in the dominant limb and greater hip flexion in the non-dominant limb, may be taking place to protect the ACL of the dominant limb. Greater ground reaction forces seemed to be found in the limb used to step down with, which may indicate that the limb to first make contact must absorb greater GRF and therefore could have a greater injury potential. In conclusion, asymmetries do exist between the dominant and non-dominant limb and may provide insight into injury prevention.
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