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Effects Of Fatigue On Muscle Activation And Shock Attenuation During Barefoot Running, Carl Q. (Carl Quinn) Newton 2010 Western Washington University

Effects Of Fatigue On Muscle Activation And Shock Attenuation During Barefoot Running, Carl Q. (Carl Quinn) Newton

WWU Graduate School Collection

Lately, barefoot running has received attention from many acknowledged researchers and athletes alike. If alterations in running mechanics related to fatigue are found to be different while running barefoot, it may help to identify the practicality and efficacy of barefoot running in terms of injury prevention. PURPOSE: The purpose of this study was to investigate the effect of global fatigue on muscle activation and the rate of shock attenuation during barefoot (BFT) and shod (SHD) running in habitually shod runners. METHODS: Eleven well-trained runners were recruited from the community to complete protocols in two different footwear conditions (BFT and SHD ...


The Effects Of Imagery And Positive Self-Review On The Performance Of Intercollegiate Basketball Players, Jonathan Rylaarsdam 2010 Western Washington University

The Effects Of Imagery And Positive Self-Review On The Performance Of Intercollegiate Basketball Players, Jonathan Rylaarsdam

WWU Graduate School Collection

Coaches frequently seek new methods to improve performance. The mental skills training of imagery combined with positive self-review has emerged as a possible device to improve athletic performance. This study was designed to examine the effectiveness of imagery and positive self-review on basketball game performance. Four male intercollegiate basketball players were chosen to participate in a single-subject, multiple baseline across subjects design. Baseline percentages of correct performance were compared to post-intervention percentages. Evidence indicated that the intervention was effective across all four participants. Results indicated a mean Win Score (Berri, Schmidt, & Brooks, 2006) increase of .74 across the four athletes ...


The Interrater And Intrarater Reliability Of The Functional Movement Screen, Jason Dudley 2010 Western Washington University

The Interrater And Intrarater Reliability Of The Functional Movement Screen, Jason Dudley

WWU Graduate School Collection

The purpose of this study was to determine the interrater and intrarater reliability of the Functional Movement Screen (FMS). Forty]Four Western Washington University athletes from various athletic teams volunteered. Twenty]one of the athletes tested volunteered to participate in a second testing session. Each athlete performed the seven components of the FMS while being evaluated by two separate testing teams. Each testing team was comprised of two members, with one member assigned to assess the sagittal plane, and the other, the frontal plane. The scores of the two members of each testing team were combined to form the total ...


An Injury Survey And Biomechanical Analysis Of Strength And Conditioning Exercises And Maximal Hiking Test (Hm180) In Junior Sailors, Wee Wing Kuen 2010 Edith Cowan University

An Injury Survey And Biomechanical Analysis Of Strength And Conditioning Exercises And Maximal Hiking Test (Hm180) In Junior Sailors, Wee Wing Kuen

Theses : Honours

In Olympic sailing, the "hiking" position is adopted by sailors to counteract forces of the wind acting on the sail and. improve boat speed. Hiking is widely regarded as the main physical challenge faced by single-handed dinghy sailors and senior dinghy sailors are known to have high rates of low back and knee injury. However, the extent of these injuries in junior sailors is yet to be reported. Although strength and conditioning exercises have been prescribed to enhance performance and prevent injury in sailors, little is known about these exercises in comparison to the demands placed on the sailor's ...


Differences In Bone Mineral Density Among Adolescent Female Tennis Players And Non-Tennis Players, Kevser Ermin 2010 University of Mississippi

Differences In Bone Mineral Density Among Adolescent Female Tennis Players And Non-Tennis Players, Kevser Ermin

Electronic Theses and Dissertations

Approximately 10 million Americans have osteoporosis. Physical activity (PA) is an important step in preventing osteoporosis and is one of the major determinants of peak bone mass during adolescence. However, type of pa plays an important role when examining the effects of pa on bone mineral density (BMD). Purpose: 1) to determine the differences in BMD among adolescent female tennis players (TP) and non-tennis players (NTP); 2) to determine the differences in body composition (BC) between adolescent female TP and NTP; 3) to determine whether BC variables (weight, fat mass, and lean mass) were predictive of differences in BMD; and ...


Dynamic Acromiohumeral Interval Changes During Scapular Plane Arm Motions, Melissa Deen Thompson 2010 Louisiana State University and Agricultural and Mechanical College

Dynamic Acromiohumeral Interval Changes During Scapular Plane Arm Motions, Melissa Deen Thompson

LSU Doctoral Dissertations

This purpose of this dissertation is to explore changes in the acromiohumeral interval during dynamic motion in the scapular plane. All of the experiments were completed in the Football Operations Athletic Training Room at Louisiana State University. The first experiment which investigated dynamic acromiohumeral interval changes in baseball players during a loaded and unloaded scaption exercise from 0°-75°, has been accepted for publication by the Journal of Shoulder and Elbow Surgery (in press, 2010). The mean acromiohumeral interval (AHI) for unloaded and loaded scaption decreased significantly (p<.001) from the arm at the side until 45° and loaded scaption narrowed AHI at 60° (p=.005) and 75° (p=.003). The second experiment investigates AHI and scapular upward rotation (SUR) changes in baseball and softball players during scaption exercises from 0°-75°. Significant load related narrowing of the AHI at 45°(p=.005), 60°(p=.001), and 75°(p<.001) and a significant load-position interaction (p=.001) at 0° and 75°was observed for all subjects. No gender differences in SUR or AHI were found. AHI and SUR displayed moderate positive correlations at 30° for both the unloaded scaption (r=.648, p=.001) and the loaded scaption (r=.445, p=.038) however, no significant relationships were present at 0°, 45°, 60° or 75°. The third experiment compared dynamic acromiohumeral interval and scapulohumeral rhythm changes in trained and untrained females during scaption exercises from 0°-90°. In general, AHI was maximal with the arm at the side and declined significantly (p<.001) during arm elevation until 60°, but increased significantly (p<.001) between 60° and 90°. Significant load related narrowing of the AHI at all positions (p<.05), a more negative SUR at 0° (p<.001) and a more positive SUR at 90° (p=.009) was observed for all subjects. Female athletes had significantly stronger external rotators (p<.001), larger overall AHI (p=.003) and more SUR (p=.008) than untrained females. Significant positive correlations (p<.05) between AHI and SUR were observed at 0°, 30°, and 60° during both loaded and unloaded scaption.


Echinacea-Induced Cytosolic Ca2+ Elevation In Hek293, Lankun Wu, Eric W. Rowe, Ksenija Jeftinija, Srdija Jeftinija, Ludmila Rizhsky, Basil Nikolau, Jodi McKay, Marian L. Kohut, Eve Wurtele 2010 Iowa State University

Echinacea-Induced Cytosolic Ca2+ Elevation In Hek293, Lankun Wu, Eric W. Rowe, Ksenija Jeftinija, Srdija Jeftinija, Ludmila Rizhsky, Basil Nikolau, Jodi Mckay, Marian L. Kohut, Eve Wurtele

Biochemistry, Biophysics and Molecular Biology Publications

Background: With a traditional medical use for treatment of various ailments, herbal preparations of Echinacea are now popularly used to improve immune responses. One likely mode of action is that alkamides from Echinacea bind to cannabinoid type 2 (CB2) receptors and induce a transient increase in intracellular Ca2+. Here, we show that unidentified compounds from Echinacea purpurea induce cytosolic Ca2+ elevation in non-immune-related cells, which lack CB2 receptors and that the Ca2+ elevation is not influenced by alkamides. Methods: A non-immune human cell line, HEK293, was chosen to evaluate E. purpurea root extracts and constituents as potential regulators of intracellular ...


Analysis Of Direct Shots At Goal From Free Kicks In Elite Women's Football, Alison Marie Alcock 2010 Southern Cross University

Analysis Of Direct Shots At Goal From Free Kicks In Elite Women's Football, Alison Marie Alcock

Theses

In elite football, approximately one third of all goals originate from set plays, and of those direct free kicks are the most effective for scoring goals. The purpose of this study was to determine the key attributes of successful direct free kicks in elite women's football and the mechanisms involved in expert performance of the skill. A method was developed that could reliably locate a football on a pitch within 0.24 m using television coverage and the official pitch markings, and then applied to all direct shots at goal from free kicks in the 2007 women's World ...


Concussions In Ice Hockey: Baseline Testing, Reporting Accuracy, And Cervical Functioning, Craig J. Coghlin 2010 Wilfrid Laurier University

Concussions In Ice Hockey: Baseline Testing, Reporting Accuracy, And Cervical Functioning, Craig J. Coghlin

Theses and Dissertations (Comprehensive)

The purpose of this study was threefold: firstly, to demonstrate the utility of the SCAT2 as both a baseline measurement and a tool to aid in the decision making process following the occurrence of a concussion; secondly, to assess the accuracy of reporting and/or relaying a diagnosis of a concussion; and finally to attempt to measure a relationship between cervical spine functioning and past concussion occurrence. Eighty hockey players were assessed for cognitive, neuropsychological, and physical measures pertaining to concussive injuries within ice hockey. The results of the study showed a marked underreporting of concussions due to either fear ...


The Influence Of Plantar Cutaneous Stimulation On A Functional Test Of Gait In Parkinson’S Disease, Rachel van Oostveen 2010 Wilfrid Laurier University

The Influence Of Plantar Cutaneous Stimulation On A Functional Test Of Gait In Parkinson’S Disease, Rachel Van Oostveen

Theses and Dissertations (Comprehensive)

Although possible deficits in proprioception have been implicated as a cause of gait impairments in individuals with Parkinson’s disease (PD), little research has been done to investigate improving this possible deficit as a method to influence mobility. The overall purpose of the current thesis was to investigate the influence of increased plantar stimulation on stability and gait impairments. This study also investigated the contribution of attention to locomotion in PD. The two studies comprising this thesis addressed the possible influence of the ribbed insoles in the initial response of PD participants as well as the long-term use of the ...


Evaluation Of The Use Of Healing Imagery In Athletic Injury Rehabilitation, Joel Cressman 2010 Wilfrid Laurier University

Evaluation Of The Use Of Healing Imagery In Athletic Injury Rehabilitation, Joel Cressman

Theses and Dissertations (Comprehensive)

Healing imagery can be defined as both visualizing affirmative images ofinternal physiological healing occurring in an injured area and visualizing oneselfas healthy and fully functioning (Driediger, Hall, & Callow, 2006). Healing imagery has been found to effectively reduce the time of recovery from various athletic injuries when used in combination with other mental skills, such as self-talk and relaxation (Ievleva & Orlick, 1991). However, the literature remains void of a study that specifically examines healing imagery and the potential