Health, Nutrition & Exercise Science Masters Theses

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Browsing Health, Nutrition & Exercise Science Masters Theses by Subject "Biomechanics"

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    Differences in Ground Reaction Forces between Take-Offs that are Out, On, or Under in the Pole Vault
    (North Dakota State University, 2012) Francis, Shawn Michael
    Aim. The take-off is regarded as the most important phase of the pole vault yet there is an insufficient amount of research on the ground reaction forces of the pole vault takeoff. At this time there is not any scientific research comparing force and time between takeoffs that are out, on and under. The purpose of this study is to compare the differences in ground reaction forces between pole vault take-offs that are out, on or under. Methods. Over five days, 15 male and female college pole vaulters completed 226 vaults on a (AMTI Accupower) force plate. The jumps were put into categories of out, on and under and analyzed by Accupower, and Dartfish software. Separate mixed modal ANOVAs (SAS 9.3) were applied (P≤.05) for comparison between jump types. Conclusions. There is no significant difference between ground reaction forces of the three jump types.
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    Evaluation of the Relationship Between Scapular Dyskinesis and Acromiohumeral Distance
    (North Dakota State University, 2022) Ives, Ariel
    This study analyzed the interaction between scapular dyskinesis (SDK) and acromiohumeral distance (AHD). Diagnostic ultrasound (DUS) was used to measure the AHD of 33 participants between 10 and 120o of weighted arm elevation in the scapular and frontal planes. Images were collected every 10o as the participant raised and held the weight at each increment. This process was completed bilaterally prior to completion of the Scapular Dyskinesis Test (SDT) to diagnose the presence of SDK. Intra-rater reliability was assessed with ICC (3,1) and four multilinear regressions were used to evaluate the relationship between AHD and SDK. Results indicated nearly perfect inter-rater reliability and a significant, positive relationship between AHD and SDK of the non-dominant arm in the scapular and frontal plane of movement.
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    Gender Differences in Lower Extremity Kinematics throughout Various Stages of a 5K Run
    (North Dakota State University, 2017) Rye, Rebekah
    Running has been a popular sport because of convenience and health benefits. Fatigue among recreational runners may alter running mechanics, thereby increasing the risk for injury. The purpose of this study was to evaluate changes in lower extremity biomechanics throughout a 3.1 mile (5K) run. Ten male and ten female participants wore reflective markers to capture contralateral pelvic drop, knee adduction, knee abduction, and hip adduction. Participants ran 3.1 miles (5K) on a treadmill at a self-determined pace. A two-way, repeated measures ANOVA was conducted to capture the within-subject data across time and between-subject comparing differences in gender. Females had significantly greater contralateral pelvic drop but it did not change over time. Knee abduction angles significantly declined over the five observations. Gender differences and effects of distance can alter the biomechanics in recreational runners. More research is needed to identify predisposing factors to the development of chronic running injuries.