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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 musculature …


Adolescents' Expectancy Beliefs And Task Values For Physically Interactive Video Games, Andrew James McGregor 2010 Louisiana State University and Agricultural and Mechanical College

Adolescents' Expectancy Beliefs And Task Values For Physically Interactive Video Games, Andrew James Mcgregor

LSU Master's Theses

The health benefits associated with appropriate levels of physical activity are well documented, but a large percentage of the population is not sufficiently active to attain those health benefits. Children are also not as active as they should be, and their activity levels decline during adolescence. Given that childhood activity patterns are likely to persist into adulthood, it is important to investigate ways to encourage children and adolescents to be physically active. Since virtually all school students participate in physical education programs, one way to do that is to explore ways that physical education programs can motivate children to be …


Exercise-Induced Alterations In Melanocortin Receptor Expression And Inflammation, Tara Michelle Henagan 2010 Louisiana State University and Agricultural and Mechanical College

Exercise-Induced Alterations In Melanocortin Receptor Expression And Inflammation, Tara Michelle Henagan

LSU Doctoral Dissertations

Inflammatory cytokines play a significant role in the pathogenesis of obesity-related diseases and have been implicated as integral factors in both early and late phases of atherosclerosis. Lifestyle modifications such as increasing physical activity and making dietary changes to induce weight loss are part of the primary prescription for the treatment of metabolic syndrome. Additionally, physical activity has been implicated as a potentially effective regimen for the control of inflammation, yet little is known about the anti-inflammatory mechanistic alterations induced by physical activity.

Exercise training causes acute changes in inflammation immediately post exercise, evidenced by upregulation of inflammatory cytokines and …


Target Eccentricity Effects For Defensive Responses, Taegyong Kwon 2010 Louisiana State University and Agricultural and Mechanical College

Target Eccentricity Effects For Defensive Responses, Taegyong Kwon

LSU Doctoral Dissertations

Defensive actions involving goal-directed responses to visual stimuli presented in different parts of the viewing field commonly include movements either toward (TOWARD) or away from (AWAY) the actual stimulus. One can categorize the type of defensive movements by outcome or the level of stimulus-response (S-R) compatibility, where a congruent response corresponds to a response in the TOWARD condition and an incongruent response corresponds to a response in the AWAY condition. In an effort to better understand defensive responses, which have received less attention in the literature than offensive movements regardless of their importance in combative situations, we studied the responses …


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.


The Effectiveness Of A Natural Carbohydrate Source (Sun-Dried Raisins) Versus Sports Jelly Beans On Prolonged Cycling Performance, Helena Rietschier 2010 Louisiana State University and Agricultural and Mechanical College

The Effectiveness Of A Natural Carbohydrate Source (Sun-Dried Raisins) Versus Sports Jelly Beans On Prolonged Cycling Performance, Helena Rietschier

LSU Master's Theses

PURPOSE: This study was designed to examine the effects of sun-dried raisins versus sports jellybeans on endurance performance in trained cyclists/triathletes. METHODS: Ten healthy males (18-33 y) completed one water-only acclimatization (WAT) exercise trial and two randomized exercise trials. Each trial consisted of a 120-minute constant intensity glycogen depletion period followed by a 10-km time trial (TT). During each experimental trial, participants consumed isocaloric amounts of sun-dried raisins (SDR) or Sports Jelly Beans(SJB) in 20-minute intervals. Measurements included: time to complete 10-km TT, power output during 10-km TT, blood glucose levels and respiratory exchange ratio (RER) during glycogen depletion period, …


Myosin Heavy Chain Composition Of Tiger (Panthera Tigris) And Cheetah (Acinonyx Jubatus) Hindlimb Muscles, Jon-Philippe Hyatt, Roland Roy, Stuart Rugg, Robert Talmadge 2009 Occidental College

Myosin Heavy Chain Composition Of Tiger (Panthera Tigris) And Cheetah (Acinonyx Jubatus) Hindlimb Muscles, Jon-Philippe Hyatt, Roland Roy, Stuart Rugg, Robert Talmadge

Stuart Rugg

Felids have a wide range of locomotor activity patterns and maximal running speeds, including the very fast cheetah (Acinonyx jubatas), the roaming tiger (Panthera tigris), and the relatively sedentary domestic cat (Felis catus). As previous studies have suggested a relationship between the amount and type of activity and the myosin heavy chain (MHC) isoform composition of a muscle, we assessed the MHC isoform composition of selected hindlimb muscles from these three felid species with differing activity regimens. Using gel electrophoresis, western blotting, histochemistry, and immunohistochemistry with MHC isoform-specific antibodies, we compared the MHC composition in the tibialis anterior, medial gastrocnemius …


Sport In Canada: A History, Donald Morrow, Kevin Wamsley 2009 Western University Canada

Sport In Canada: A History, Donald Morrow, Kevin Wamsley

Donald Morrow

No abstract provided.


Neighborhood Design And Perceptions: Relationship With Active Commuting, Carolyn C. Voorhees, J. Scott Ashwood, Kelly R. Evenson, John R. Sirard, Ariane L. Rung, Marsha Dowda, Thomas L. McKenzie 2009 University of Massachusetts - Amherst

Neighborhood Design And Perceptions: Relationship With Active Commuting, Carolyn C. Voorhees, J. Scott Ashwood, Kelly R. Evenson, John R. Sirard, Ariane L. Rung, Marsha Dowda, Thomas L. Mckenzie

John Sirard

Purpose—Walking to and from school contributes to total physical activity levels. This study investigated whether perceived and actual neighborhood features were associated with walking to or from school among adolescent girls. Methods—A sample of geographically diverse 8th grade girls (N=890) from the Trial for Activity in Adolescent Girls (TAAG) study living within 1.5 miles of their middle school were recruited. Participants completed a self-administered survey on their neighborhood and walking behavior. Geographic information system (GIS) data were used to assess objective neighborhood features. Nested multivariable logistic regression analyses were conducted to determine the contribution of perceived and objective measures of …


The Relative Influence Of Demographic, Individual, Social, And Environmental Factors On Physical Activity Among Boys And Girls, Carrie D. Patnode, Leslie A. Lytle, Darin J. Erickson, John R. Sirard, Daheia Barr-Anderson, Mary Story 2009 University of Massachusetts - Amherst

The Relative Influence Of Demographic, Individual, Social, And Environmental Factors On Physical Activity Among Boys And Girls, Carrie D. Patnode, Leslie A. Lytle, Darin J. Erickson, John R. Sirard, Daheia Barr-Anderson, Mary Story

John Sirard

Background: This study aimed to evaluate the associations of selected demographic, individual, social, and environmental factors with moderate-to-vigorous physical activity (MVPA) in a sample of children and adolescents. Methods: MVPA was assessed among youth (n = 294) 10-17-years-old using the ActiGraph accelerometer. Youth completed measures of demographic and individual variables related to physical activity (PA), perceived social support by parents and peers, and perceived neighborhood characteristics. Parents completed the long-form of the International Physical Activity Questionnaire. The Physical Activity and Media Inventory was used to measure the home environment and Geographical Information Systems software was used to measure the physical …


Adolescent Physical Activity And Screen Time: Associations With The Physical Home Environment, John R. Sirard, Melissa N. Laska, Carrie D. Patnode, Kian Farbakhsh, Leslie A. Lytle 2009 University of Massachusetts - Amherst

Adolescent Physical Activity And Screen Time: Associations With The Physical Home Environment, John R. Sirard, Melissa N. Laska, Carrie D. Patnode, Kian Farbakhsh, Leslie A. Lytle

John Sirard

Background: Previous research on the environment and physical activity has mostly focused on macro-scale environments, such as the neighborhood environment. There has been a paucity of research on the role of microscale and proximal environments, such as that of the home which may be particularly relevant for younger adolescents who have more limited independence and mobility. The purpose of this study was to describe associations between the home environment and adolescent physical activity, sedentary time, and screen time. Methods: A total of 613 parent-adolescent dyads were included in these analyses from two ongoing cohort studies. Parents completed a Physical Activity …


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