Date of Award

Spring 2011

Document Type


Degree Name

Master of Science in Education (MSEd)


Human Movement Sciences


Athletic Training

Committee Director

Bonnie Van Lunen

Committee Member

Nelson Cortes

Committee Member

Stacie Ringleb

Call Number for Print

Special Collections LD4331.E44 S85 2011


The incidence of noncontact anterior cruciate ligament (ACL) knee injuries has been studied extensively and has been reported as one of the highest injuries amongst high school and collegiate athletes. Little research has been focused on maturational changes in relation to the risk factors of such an injury. The purpose of this study is to determine if there is a difference between pre-pubescent (PRE), pubescent (MID) and postpubescent (POST) male lacrosse athletes indicated by knee and hip kinetics and kinematics during an unanticipated sidestep cutting task (SS). Thirty-one male participants between the ages of nine and fourteen were recruited and categorized into three groups; PRE (n=8, 9.9±1.1years, 137.3±8.8cm, 32.7±7.1kg), MID (n=12, 11.4±0.9years, 153.6±10.7cm,44.5±10.9kg) and POST (n=11, 12.9±0.7years, 165.6±5.9cm, 53.4±8.7kg) and were free of lower extremity injury. The Pubertal Maturation Observation Scale (PMOS) was used to allot the subjects into their corresponding maturation levels. Three-dimensional motion analysis, coupled with two force plates, was used to capture five successful SS trials: There was a significant difference found in the hip extension moment between maturation groups. Specifically, MID (-2.28±0.39Nm/kgm) subjects displayed a greater moment than both PRE (1.85±0.28Nm/kgm) and POST (-1.84±0.34Nm/kgm) subjects (p=0.009). There were no other statistically significant differences between maturation levels at any time instance. With this small difference between maturation levels, there is not evidence of a change in the biomechanics of the lower extremity during the maturation process of youth male lacrosse athletes.


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