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Articles 151 - 173 of 173
Full-Text Articles in Medicine and Health Sciences
Effect Of Acute L-Alanyl-L-Glutamine (Sustamine) And Electrolyte Ingestion On Cognitive Function, Multiple Object Tracking And Reaction Time Following Prolonged Exercise, Gabriel Pruna
Electronic Theses and Dissertations
Changes in physiological function occurring during a body water deficit may result in significant decrements in performance, cognitive function and fine motor control during exercise. This may be due to the magnitude of the body water deficit. Rehydration strategies are important to prevent these deleterious effects in performance. The purpose of this study was to examine the changes before and after prolonged exercise of an alanine-glutamine dipeptide (AG) on cognitive function and reaction time. Twelve male endurance-trained runners (age: 23.5 [plus or minus] 3.7 y; height: 175.5 [plus or minus] 5.4 cm; weight: 70.7 [plus or minus] 7.6 kg) participated …
The Cross Education Of Neuromuscular Economy, Kyle Beyer
The Cross Education Of Neuromuscular Economy, Kyle Beyer
Electronic Theses and Dissertations
Cross education is the phenomenon by which the untrained limb will experience a gain in strength following a unilateral resistance training program. However, little is known as to the underlying adaptation occurring in the untrained limb. Purpose: To examine the effect of dynamic unilateral resistance training on the strength and neuromuscular adaptations of both the trained and untrained legs. Methods: Eight previously untrained males (22.38±2.92 y, 1.73±0.08 m, 75.26±14.53 kg) completed a four-week unilateral resistance training program, while another eight untrained males (24.00±4.57 y, 1.84±0.05 m, 94.21±16.14 kg) served as controls. Isometric leg extension strength, leg press 1 repetition maximum …
The Effect Of Moderate Altitude On High Intensity Running Performance During A Game With Collegiate Female Soccer Players, Jonathan Bohner
The Effect Of Moderate Altitude On High Intensity Running Performance During A Game With Collegiate Female Soccer Players, Jonathan Bohner
Electronic Theses and Dissertations
Competition often requires teams that reside at sea level to compete against opponents whose residence is at a moderate altitude. This may pose a potential competitive disadvantage considering that moderate altitude may cause decrements in VO2max, distance covered, and time to exhaustion in endurance athletes. The purpose of this study was to examine the effect of altitude on game performance measures. Six NCAA Division I female soccer players (20.33 ± 1.21 y; 168 ± 6.45 cm; 62.5 ± 6.03 kg) were retrospectively examined. Comparisons were made between two competitions that were played at sea level (SL) within two weeks of …
Endocrine And Contralateral Muscle Responses To Short-Term Unilateral Resistance Training, Carleigh Boone
Endocrine And Contralateral Muscle Responses To Short-Term Unilateral Resistance Training, Carleigh Boone
Electronic Theses and Dissertations
PURPOSE: The purpose of this study was to examine the effects of short-term lower body unilateral resistance training on hormonal, muscle morphological, and performance measures in young men. METHODS: Seventeen healthy, untrained young men (Age: 22.8 ± 3.7 y; BMI: 26.5 ± 4.9 kg/m2) were randomly assigned to one of two groups (UT: 22.9 ± 4.6 y, 25.3 ± 4.2 kg/m2; CON: 24.0 ± 4.6 y, 27.7 ± 5.1 kg/m2). Resistance training consisted of 4 weeks of unilateral lower body and bilateral upper body exercises on 3 days per week. Each training session entailed unilateral countermovement jumps (3 × 8), …
The Effects Of High-Intensity Interval Training And 28 Days Of [Beta]-Hydroxy-[Beta]-Methybutyrate Supplementation On Measures Of Aerobic Power And Metabolic Thresholds, Edward Robinson
Electronic Theses and Dissertations
Purpose: To examine the effects of 28 days of β-hydroxy-β-methylbutyrate free acid (HMB) and high-intensity interval training (HIIT) on maximal oxygen consumption (VO2peak), ventilatory threshold (VT), respiratory compensation point (RCP) and time to exhaustion (Tmax) in collegeaged men and women. Methods: Healthy men and women (n=34, age and VO2peak= 22.7+3.1yr and 39.3+5.0 mL. kg-1.min-1, respectively) participated in this study. All participants completed a series of tests prior and subsequent to treatment. A maximal oxygen consumption test was performed on a cycle ergometer to assess VO2peak, Tmax, VT, and RCP. The peak power output (Ppeak), power at VT (PVT) and power …
Landing Technique Assessment Utilizing Laboratory-Based Landing And Simulated Basketball Landing Tasks, Hiromi Kowata
Landing Technique Assessment Utilizing Laboratory-Based Landing And Simulated Basketball Landing Tasks, Hiromi Kowata
Electronic Theses and Dissertations
Context: The Landing Error Scoring System (LESS) is a two-dimensional landing technique assessment tool that is readily available to clinicians. However, the LESS merely assesses a contrived landing, rather than dynamic, complex movements that may occur during actual athletic performance. Objective: To compare the LESS scores and knee joint kinematics between the LESS vertical-drop jump (DVJ), and two simulated basketball landing performances, jump-stop jump shot (JS) and rebounding (RB). Design: Prospective, cross-sectional study. Setting: An intramural basketball court. Participants: Twenty-five female recreational basketball players (Age: 20.96±1.70, Height (cm): 166.07 ± 9.10, Weight (kg): 68.54 ±12.17). Intervention(s) …
Investigating The Effects Of Endurance Training On Heart Rate Variability In Female Swimmer Athletes, Joshua G. Beck
Investigating The Effects Of Endurance Training On Heart Rate Variability In Female Swimmer Athletes, Joshua G. Beck
Electronic Theses and Dissertations
It is important for elite endurance athletes to have practical and reliable means of measuring fatigue throughout their training. Variations in Autonomic Nervous System activity (ANS) may provide an effective marker of fatigue and of recovery. ANS control of heart rate is well known to be affected by exercise training, and those adaptations can be determined using measures of heart rate variability (HRV). Previous research has examined the effect of training on HRV and ANS control of heart rate in males, there is a lack of any comprehensive studies that address adaptations in female athletes. Therefore, the purpose of this …
Concussion Reporting Rates At The Conclusion Of A Collegiate Athletic Career, Frances C. Gilbert
Concussion Reporting Rates At The Conclusion Of A Collegiate Athletic Career, Frances C. Gilbert
Electronic Theses and Dissertations
Context: Concussions are common sports-related head injuries, with an estimated 1.6-3.8 million sport-related traumatic brain injuries occurring each year. Proper diagnosis of a concussion often lies in self-reporting symptoms, however, an estimated 50-80% of concussions remain unreported. More than half of college athletes indicate they have no head injury knowledge including potential consequences, however, more than 80% would have reported a head injury if they had understood the potential risks. This lack of knowledge may create the potential for unrecognized concussive injury, therefore causing vast underreporting. Objective: The purpose of this study is to evaluate the current reported …
An Examination Of Behavioral And Temporal Consistency Of Pre-Performance Routines In Ncaa Division I Basketball Free Throw Shooting – A Naturalist Observational Investigation, Jacob Blumberg
Electronic Theses and Dissertations
Research has shown that pre-performance routines positively influence performance of closed and self-paced skills (Boutcher & Crews, 1987; Cohn, 1990; Otto et al., 2011). Boutcher and Crews (1987) suggested that pre-performance routines improve performance by helping reduce anxiety along with helping athletes’ retain mental sharpness and focus. Furthermore, several quantitative studies have examined the influence of both behavioral and temporal consistency of pre-performance routines on the success of a skill, yielding inconsistent results (Boutcher & Crews, 1987; Lobmeyer & Wasserman, 1986; Lonsdale & Tam, 2008; Jackson, 2003). However, research examining this phenomenon from a qualitative and naturalistic observational perspective is …
An Interval Training Bout On Cognitive Performance In Healthy Adults, David Young
An Interval Training Bout On Cognitive Performance In Healthy Adults, David Young
Electronic Theses and Dissertations
Cognitive performance has been shown to improve with regular aerobic exercise training. Despite this, most Americans do not adhere to current exercise prescription guidelines. High intensity interval training (HIIT) has been suggested as a lower time commitment, more enjoyable alternative to regular aerobic exercise. Twenty nine apparently healthy college-aged adults were recruited and administered a high intensity interval training session with a pre- and 24 hours-post-exercise cognitive performance test. No changes were found in performance following the bout of high intensity interval training. No significant interactions were observed when comparing performance to gender, training age, training goal, or intra-exercise rating …
Exercise Participation During Weight Loss On A High Protein – Low Carbohydrate Diet Plan In Females Aged 15-25 Years, Margaret Mobley-Meulman
Exercise Participation During Weight Loss On A High Protein – Low Carbohydrate Diet Plan In Females Aged 15-25 Years, Margaret Mobley-Meulman
Electronic Theses and Dissertations
Weight gain due to poor diet and lack of exercise is responsible for over 300,000 deaths each year (U.S. Department of Health and Human Services, 2010). Obese adults have an increased risk for serious health conditions including high blood pressure and cholesterol, type 2 diabetes, coronary heart disease, stroke, gallbladder disease, osteoarthritis, sleep apnea, respiratory problems, and certain cancers (National Cancer Institute, 2012). Participation in exercise can help control weight, strengthen muscles and bones, and reduce the incidence of cardiac events, stroke, hypertension, type 2 diabetes, colon and breast cancers, osteoporotic fractures, gallbladder disease, obesity, depression, anxiety, and delay mortality …
Efficacy Of Partial Rom Squat In Maximal Strength Training, Caleb Bazyler
Efficacy Of Partial Rom Squat In Maximal Strength Training, Caleb Bazyler
Electronic Theses and Dissertations
Eighteen well trained males (1RM Squat: 150.57 ± 26.79 kg) were assigned to two groups: full ROM training (control) and full ROM with partial ROM training (CP) for the seven-week training intervention. There was a significant time effect (p
Do Changes In Muscle Architecture Effect Post- Activation Potentiation, Danielle Reardon
Do Changes In Muscle Architecture Effect Post- Activation Potentiation, Danielle Reardon
Electronic Theses and Dissertations
Purpose: To examine the effect of three muscle potentiation protocols on changes in muscle architecture and the subsequent effect on jump power performance. Methods: Maximal (1RM) squat strength (Mean SD=178.3 ± 36.6kg), vertical jump power, and muscle architecture were obtained in 12 resistance trained men (25.2±3.6y; 90.67±12.7kg). Participants randomly completed three squatting protocols at 75% (3 x 10 reps), 90% (3 x 3 reps) or 100% (1 x 1) of their 1RM, or no workout (CON), with each protocol being separated by one week. During each testing session ultrasound and vertical jump testing were assessed at baseline (BL), 8min post …
The Effects Of 6-Weeks Of Resistance Training On The Neuromuscular Fatigue Threshold In Older Adults, Nadia Emerson
The Effects Of 6-Weeks Of Resistance Training On The Neuromuscular Fatigue Threshold In Older Adults, Nadia Emerson
Electronic Theses and Dissertations
Age-related deficits in muscle mass, strength, and function place an increased burden of work on existing skeletal muscle and may lead to early onset of neuromuscular fatigue (NMF) during activities of daily living. Resistance exercise (RE) is the proven method for improving neuromuscular function in healthy older adults. PURPOSE: To investigate the effects of 6 weeks of RE on the NMF threshold as well as strength and functional performance in older adults. METHODS: Twenty-four older adults were randomly assigned to 6 weeks of RE (EXE; n = 12; age 72 ± 6.3 y; BMI 28.4 kg/m2 ) or control (CONT; …
Physiological Muscle Qualitative Changes In Response To Resistance Training In Older Adults, Tyler Scanlon
Physiological Muscle Qualitative Changes In Response To Resistance Training In Older Adults, Tyler Scanlon
Electronic Theses and Dissertations
Muscle function is determined by structure and morphology at the architectural level. In response to resistance training, older adults have demonstrated that the neuromuscular system has a substantial adaptability, which may compensate for muscle size and quality and lead to improved functional capacities and higher quality of life. PURPOSE: The purpose of this study was to examine the effect of six weeks of progressive resistance exercise on muscle morphology and architecture in healthy older adults. METHODS: Twenty- five healthy men and women were randomly assigned to either six weeks of progressive resistance training (RT) (n=13; age = 71.08 ± 6.75, …
Choice Response Time Differences Between Recently Recovered Concussed And Healthy Student-Athletes, Tiffen Tapia-Lovler
Choice Response Time Differences Between Recently Recovered Concussed And Healthy Student-Athletes, Tiffen Tapia-Lovler
Electronic Theses and Dissertations
Some 1.6 to 3.8 million sports-related concussions occur annually in the United States. Utilization of test batteries and exercise protocols are recommended to ensure athletes recover completely. Many batteries involve response time (RT) tests, which show response time increases post concussion. A major limitation of RT tests is that all are done in static position. Additionally, many studies show a lingering effect on RT. The addition of RT tests to check for lingering symptoms could be beneficial. The purpose of this study was to see if significant differences could be found in RT tests involving dynamic movement between healthy studentathletes …
The Effects Of Phosphatidylserine On Reaction Time And Cognitive Function Following An Exercise Stress, Adam John Wells
The Effects Of Phosphatidylserine On Reaction Time And Cognitive Function Following An Exercise Stress, Adam John Wells
Electronic Theses and Dissertations
Phosphatidylserine (PS) is an endogenously occurring phospholipid that has been shown to have cognition and mood enhancing properties in humans, possibly through its role as an enzyme co-factor in cellular signal transduction. Specifically, PS has been identified as activator of classical isoforms of protein kinase C, an enzyme known to be involved in the growth and differentiation of neural cells, and is therefore thought to play a role in the protection of neurons. The purpose of this study was to examine the effects of supplementation with PS and caffeine on measures of cognition, reaction time and mood prior to and …
Phosphatidic Acid Increases Lean Body Tissue And Strength In Resistance Trained Men, David Williams
Phosphatidic Acid Increases Lean Body Tissue And Strength In Resistance Trained Men, David Williams
Electronic Theses and Dissertations
Phosphatidic Acid (PA) is a natural phospholipid compound derived from lecithin which is commonly found in egg yolk, grains, fish, soybeans, peanuts and yeast. It has been suggested that PA is involved in several intracellular processes associated with muscle hypertrophy. Specifically, PA has been reported to activate protein synthesis through the mammalian target of rapamycin (mTOR) signaling pathway and thereby may enhance the anabolic effects of resistance training. To our knowledge, no one has examined the effect of PA supplementation in humans while undergoing a progressive resistance training program. To examine the effect of PA supplementation on lean soft tissue …
Motivation, Need Support And Need Satisfaction In Youth Soccer Players, Erica Lippitt
Motivation, Need Support And Need Satisfaction In Youth Soccer Players, Erica Lippitt
Electronic Theses and Dissertations
Author's abstract: Physical activity levels and obesity rates vary greatly across ethnic groups in the United States (CDC, 2011). One popular way to increase physical activity levels in youth is through youth sport participation, which may be influenced by athlete motivation. Numerous studies have determined motivation levels in youth sport participants, but very little done in comparing levels across different ethnic groups. Identifying differences in motivation levels based on ethnicity can allow coaches and sport administrators to adjust practices and program setups to increase participation and meet needs of player competence. The purpose of the study was to determine if …
Effect Of Honey On Anaerobic Performance In Male Collegiate Soccer Players, Katelyn G. Woolfolk
Effect Of Honey On Anaerobic Performance In Male Collegiate Soccer Players, Katelyn G. Woolfolk
Electronic Theses and Dissertations
Author's abstract: Carbohydrate supplementation has been associated with increased performance in aerobic and anaerobic activity. Honey, specifically, has shown to increase performance in aerobic exercise as well as provide other health benefits. The purpose of this study was to see if honey, a natural substance, has a positive effect on anaerobic performance, rates of perceived exertion, and gastrointestinal distress. Subjects consisted of 18 healthy, Division 1 collegiate male soccer players (19.39 ± 0.85 yr, 75.39 ± 7.97 kg). All had no allergies and were cleared for participation by a certified athletic trainer. Subjects were randomly assigned to one of three …
The Effect Of A Commercially Available Caffeine Based Dietary Supplement On 40-Kilometer Time Trial Performance, Lee A. Weidauer
The Effect Of A Commercially Available Caffeine Based Dietary Supplement On 40-Kilometer Time Trial Performance, Lee A. Weidauer
Electronic Theses and Dissertations
Purpose: To determine wheather ot not the nutritional supplement PreRace containing L-Taurine, Citrulline Malate, Quercetin, DiMethyl Amino Ethanol, Caffeine, Metabromine, Catechin, and Malic acid will improve performance in an indoor 40 Kilometer cycling time trial.
Methods: Seven male cyclists ages 21-58 participated in a placebo-controlled investigation which consisted of two trials in which they consumed either the supplement PreRace or aloe vera juice. In each of the trials the placebo or supplement was mixed with a sports beverage. Subjects performed a 40 kilometer time trial and measurements of oxygen consumption and lactate were taken every 15 minutes as well as …
Fear Of Failure, Experience, And Division As Predictors Of State Anxiety In Usfa Epee Fencers, Elizabeth Helen Athanas
Fear Of Failure, Experience, And Division As Predictors Of State Anxiety In Usfa Epee Fencers, Elizabeth Helen Athanas
Electronic Theses and Dissertations
Research looks for the sources of state anxiety for individual athletes prior to competition, which can be debilitating (Gould, 1993; Gould, Horn & Spreeman, 1983). Non-elite athletes who are high trait anxious (possibly fear of failure) have higher state anxiety than elite athletes (Conroy, 2002; Gould, Horn & Spreeman, 1983). Fencers may be prone to elevated state anxiety. No research links these variables together in fencing. The purpose of the study is to examine fear of failure, experience, and division as predictors of state anxiety for epee fencers prior to competition. Epee fencers (N = 145) who competed in the …
An Investigation Of The Validity Of Selected Submaximal Field Tests To Estimate Aerobic Capacity In Untrained Females, Barbara A. Moran
An Investigation Of The Validity Of Selected Submaximal Field Tests To Estimate Aerobic Capacity In Untrained Females, Barbara A. Moran
Electronic Theses and Dissertations
The purpose of this investigation was twofolds (1) to determine the validity of selected submaximal field tests used to estimate aerobic capacity, and (2) to determine the association of maximal oxygen consumption with the performance of selected submaximal field test. Eighteen females (X = l.9.4 yrs) volunteered to be Ss. Prior to the first two field tests, anthropometric data of ht and wt were collected and %BF, FW, and FFW were computed from skinfold measurements. The field tests investigated were the 12 min run, the 600 yd run, and the QCST. All measurements were analyzed for reliability and reproducibility by …