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The relationship between lower extre...

The University of North Carolina at Chapel Hill., Exercise and Sport Science.

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The relationship between lower extremity muscle activity and knee flexion angle during a jump-landing task.

Record Type:	Electronic resources : Monograph/item
Title/Author:	The relationship between lower extremity muscle activity and knee flexion angle during a jump-landing task./
Author:	Walsh, Meghan C.
Description:	86 p.
Notes:	Adviser: Darin Padua.
Contained By:	Masters Abstracts International47-01.
Subject:	Biology, Physiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1454442
ISBN:	9780549668787

The relationship between lower extremity muscle activity and knee flexion angle during a jump-landing task.
Walsh, Meghan C.

The relationship between lower extremity muscle activity and knee flexion angle during a jump-landing task. - 86 p.

Adviser: Darin Padua.

Thesis (M.A.)--The University of North Carolina at Chapel Hill, 2008.

Objective. To determine relationships between lower extremity muscle activity and knee flexion angle during a jump-landing task. Subjects. Thirty recreationally active people free from previous ACL injury. Methods. Muscle activity of the lower extremity and knee flexion angle were recorded during 10 trials of the jump-landing task. Data was analyzed using correlation and multiple regression statistical analyses. Results. Eight significant negative relationships were found, VMO, GMAX activity and Q:H ratio with knee flexion angle at initial contact (VMO: r = -0.382, P = 0.045, GMAX: r = -0.385, P = 0.043, Q:H ratio: r = -.442, P = .018). VMO, VL, and GMAX activity with peak knee flexion angle (VMO: r = -0.687, P = 0.00, VL: r = -0.467, P = .011, GMAX: r = -0.386, P = 0.043). VMO and VL activity with knee flexion displacement (VMO: r = -0.631, P= 0.00, VL: r = -0.453, P = 0.014). Q:H ratio and GMAX activity predicted 34.7% of knee flexion angle variance at initial contact (R2 = 0.347, P = 0.006). VMO activity predicted 47.1% of peak knee flexion angle variance (R2 = 0.471, P = 0.000). VMO and VL activity predicted 49.5% of knee flexion displacement variance (R2 = 0.495, P = 0.000). Conclusions. Increased quadriceps and GMAX activation, with a lack of hamstring and gastrocnemius activation, showed a relationship with decreased knee flexion angle and we speculate this movement pattern to be a potential risk-factor for ACL injury.

ISBN: 9780549668787Subjects--Topical Terms:

1017816
Biology, Physiology.

The relationship between lower extremity muscle activity and knee flexion angle during a jump-landing task.
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020 $a 9780549668787
035 $a (UMI)AAI1454442
035 $a AAI1454442
040 $a UMI $c UMI
100 1 $a Walsh, Meghan C. $3 1043326
245 1 4 $a The relationship between lower extremity muscle activity and knee flexion angle during a jump-landing task.
300 $a 86 p.
500 $a Adviser: Darin Padua.
500 $a Source: Masters Abstracts International, Volume: 47-01, page: 0355.
502 $a Thesis (M.A.)--The University of North Carolina at Chapel Hill, 2008.
520 $a Objective. To determine relationships between lower extremity muscle activity and knee flexion angle during a jump-landing task. Subjects. Thirty recreationally active people free from previous ACL injury. Methods. Muscle activity of the lower extremity and knee flexion angle were recorded during 10 trials of the jump-landing task. Data was analyzed using correlation and multiple regression statistical analyses. Results. Eight significant negative relationships were found, VMO, GMAX activity and Q:H ratio with knee flexion angle at initial contact (VMO: r = -0.382, P = 0.045, GMAX: r = -0.385, P = 0.043, Q:H ratio: r = -.442, P = .018). VMO, VL, and GMAX activity with peak knee flexion angle (VMO: r = -0.687, P = 0.00, VL: r = -0.467, P = .011, GMAX: r = -0.386, P = 0.043). VMO and VL activity with knee flexion displacement (VMO: r = -0.631, P= 0.00, VL: r = -0.453, P = 0.014). Q:H ratio and GMAX activity predicted 34.7% of knee flexion angle variance at initial contact (R2 = 0.347, P = 0.006). VMO activity predicted 47.1% of peak knee flexion angle variance (R2 = 0.471, P = 0.000). VMO and VL activity predicted 49.5% of knee flexion displacement variance (R2 = 0.495, P = 0.000). Conclusions. Increased quadriceps and GMAX activation, with a lack of hamstring and gastrocnemius activation, showed a relationship with decreased knee flexion angle and we speculate this movement pattern to be a potential risk-factor for ACL injury.
590 $a School code: 0153.
650 4 $a Biology, Physiology. $3 1017816
650 4 $a Health Sciences, Recreation. $3 1018003
690 $a 0575
690 $a 0719
710 2 $a The University of North Carolina at Chapel Hill. $b Exercise and Sport Science. $3 1043309
773 0 $t Masters Abstracts International $g 47-01.
790 $a 0153
790 1 0 $a Blackburn, J. Troy $e committee member
790 1 0 $a Boling, Michelle $e committee member
790 1 0 $a Padua, Darin, $e advisor
791 $a M.A.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1454442