This research study examined a change of direction task within collegiate lacrosse players by using a 5-10-5 agility drill to determine if the presence or absence of the lacrosse stick (crosse) affected change of direction ability. A literature review assessed the angle-velocity tradeoff, optimal ways to perform a change of direction, and additional factors that can influence change of direction performance. 10 male participants performed 10 total trials, 5 with their stick and 5 without and timing and leg angles were measured. There were no major differences between the two conditions except for the leg angle for turn 2, as a correlation stating an increase in leg angle results in an increase in turn time was found. A case study on one of the participants was performed, which aligned with the correlation between turn 2 time and turn 2 leg angle. Overall execution of the change of direction did not align with the optimal techniques found in the literature response. Momentum leading into each turn is an influencing factor in turn time and overall time and may be the reason for the correlation between turn 2 leg angle and time.

This thesis reviewed variables of baseball mechanics and performance as discussed in current literature. This included investigating factors of biomechanics, the health of players, and comparisons across demographics. At the biomechanical level, components of the kinetic chain were observed as the energy transferred from the lower body to the upper body. Additionally, the upper body appeared to compensate for deficits in the rotation of the trunk. Injuries to the abdominal and low back were correlated with trunk rotation, while arm injuries were traced back to overuse and fatigue. When considering experience level, variation tended to decrease. Youth players demonstrated different patterns of fatigue and different injury correlates compared to adults. At a geographic level, American pitchers may be associated with an increased risk of elbow injuries, with Japanese and Korean pitchers to shoulder injuries; these differences are thought to be due to differences in instruction. Applying this research and findings to current baseball players may help guide training and performance or continue research.

The purpose of this study was to identify the different contributors and predictors related to athlete burnout. Athlete burnout consists of emotional and physical exhaustion, reduced sense of accomplishments and sport devaluation. Moreover, motivation type, athletic identity, and being a student athlete can affect athlete burnout. Participants of this study were female, Division I soccer student-athletes located in Tempe, Arizona [n=22]. Athlete burnout was assessed with the Athlete Burnout Questionnaire (ABQ). Motivation type was assessed with the Behavioral Regulation in Sport Questionnaire (BRSQ). Athletic identity was assessed with the Athletic Identity Measurement Scale (AIMS). Student burnout was assessed with the Maslach Burnout Inventory - Student Survey (MBI-SS). All of the questionnaires were answered based on a Likert scale. Pearson correlations were used to find relationships between the different variables and athlete burnout. The results showed that 50% of the participants were burnt out at the end of their competitive season. Correlations were shown between the ABQ and its subscales: reduced accomplishment (r=0.6101, p<0.05), physical and mental exhaustion (r=0.8170, p<0.05), and devaluation (r=0.8697, p<0.05). Furthermore, the ABQ was also negatively correlated with general intrinsic motivation (r=-0.4943, p<0.05) and intrinsic motivation to know (r=-0.4865, p<0.05). The results from this study should be used for further research that focuses on education and prevention of athlete burnout in female soccer players.

The purpose of this study was to identify the different contributors and predictors related to athlete burnout. Athlete burnout consists of emotional and physical exhaustion, reduced sense of accomplishments and sport devaluation. Moreover, motivation type, athletic identity, and being a student athlete can affect athlete burnout. Participants of this study were female, Division I soccer student-athletes located in Tempe, Arizona [n=22]. Athlete burnout was assessed with the Athlete Burnout Questionnaire (ABQ). Motivation type was assessed with the Behavioral Regulation in Sport Questionnaire (BRSQ). Athletic identity was assessed with the Athletic Identity Measurement Scale (AIMS). Student burnout was assessed with the Maslach Burnout Inventory - Student Survey (MBI-SS). All of the questionnaires were answered based on a Likert scale. Pearson correlations were used to find relationships between the different variables and athlete burnout. The results showed that 50% of the participants were burnt out at the end of their competitive season. Correlations were shown between the ABQ and its subscales: reduced accomplishment (r=0.6101, p<0.05), physical and mental exhaustion (r=0.8170, p<0.05), and devaluation (r=0.8697, p<0.05). Furthermore, the ABQ was also negatively correlated with general intrinsic motivation (r=-0.4943, p<0.05) and intrinsic motivation to know (r=-0.4865, p<0.05). The results from this study should be used for further research that focuses on education and prevention of athlete burnout in female soccer players.

This case study describes an adult patient whose brachial plexus injury was treated with various modalities and exercise. The participant of this study was a 76 year old female who sustained a brachial plexus injury during an elective reverse total shoulder arthroplasty. The initial evaluation reported only passive range of motion with 90 degrees shoulder flexion, 85 degrees abduction, and 30 degrees external rotation. Muscle testing yielded significantly limited wrist and digit extension strength. Testing of sensation found diminished protective sensation along the median nerve distribution, including the thumb, index finger, and middle finger. Occupational therapy was initiated for postoperative treatment of the shoulder as well as treatment of the brachial plexus palsy. Therapy consisted of static splinting for healing structures and sensory reeducation through massage, finding objects with the eyes occluded, and fluidotherapy. Additionally, various exercises and modalities for improving motion and strength were initiated, including proprioceptive neuromuscular reeducation, passive/active assist/active exercises, dynamic splinting, muscle stimulation, kinesio tape, functional activities, and tendon glides. After five months, active range of motion in the shoulder, elbow, and wrist was finally achieved and median nerve sensation had improved. After nine months, elbow motion was within normal limits and wrist motion had significantly improved. Upon muscle testing, the elbow, forearm, wrist, and hand had made significant gains in strength. However, shoulder strength and motion was still limited. Overall, treatment made a significant improvement in the patient’s functionality.

The purpose of this Barrett Thesis Project is to review the existing literature on ACL injuries specifically regarding their risk factors, prevention, and recovery options. The content of the review has been placed into four sections: physiological factors, biomechanical factors, surgery and recovery factors, as well as training factors. Physiological factors look at static structures and their impact on ACL injuries, more specifically, the role that variations on physical structure values can have on injury incidence. Biomechanical factors focus on the ways that movement can contribute to injury and the ways that incorrect movement or unanticipated movement can have on the structures of the knee. Surgery and recovery factors look at surgical techniques that have been used to correct ACL injuries and the details of their function as well as certain surgical techniques that have differing rates of success and how they can impact re-injury and rehabilitation rates. Finally, training factors analyze techniques that can be used in both pre-injury or post-injury situations therefore, this section looks at the ways that training can minimize re-injury as well as work towards preventing the initial injury. Overall, this research review looks at how these factors come together to contribute to an ACL injury and the ways that injury incidence can be minimized. Risk factors come together in order to create an undesirable situation in which the ACL ligament ruptures. These risk factors are either physiological or biomechanical in nature. As a result of injury, certain surgical techniques can be used that impact the success of a patient. Evidence for the benefit of training factors can then be applied in order to reduce injury risk or prevent future injuries.

The purpose of this Barrett Thesis Project is to review the existing literature on ACL injuries specifically regarding their risk factors, prevention, and recovery options. The content of the review has been placed into four sections: physiological factors, biomechanical factors, surgery and recovery factors, as well as training factors. Physiological factors look at static structures and their impact on ACL injuries, more specifically, the role that variations on physical structure values can have on injury incidence. Biomechanical factors focus on the ways that movement can contribute to injury and the ways that incorrect movement or unanticipated movement can have on the structures of the knee. Surgery and recovery factors look at surgical techniques that have been used to correct ACL injuries and the details of their function as well as certain surgical techniques that have differing rates of success and how they can impact re-injury and rehabilitation rates. Finally, training factors analyze techniques that can be used in both pre-injury or post-injury situations therefore, this section looks at the ways that training can minimize re-injury as well as work towards preventing the initial injury. Overall, this research review looks at how these factors come together to contribute to an ACL injury and the ways that injury incidence can be minimized. Risk factors come together in order to create an undesirable situation in which the ACL ligament ruptures. These risk factors are either physiological or biomechanical in nature. As a result of injury, certain surgical techniques can be used that impact the success of a patient. Evidence for the benefit of training factors can then be applied in order to reduce injury risk or prevent future injuries.