Motor Unit Firing In The Human Anconeus During High Intensity Eccentric Contractions Of Elbow Extensors,
2017
The University of Western Ontario
Motor Unit Firing In The Human Anconeus During High Intensity Eccentric Contractions Of Elbow Extensors, Christopher W. Stolworthy
Electronic Thesis and Dissertation Repository
PURPOSE: To track single motor units through both isometric and eccentric elbow extensor contractions, at near maximal contraction intensity, and compare firing rates between contraction modes at an absolute torque. METHODS: Bipolar fine-wire electrodes were inserted into the anconeus in order to record motor unit firing behaviour during sets of high torque isometric and eccentric contractions. Contractions were performed on an isokinetic dynamometer at a pre-determined speed of 10°/s, through 60° total range of elbow joint motion, and at 50, 75 or 100% MVC. RESULTS: Mean motor unit firing rates were lower during eccentric contractions across all intensities (p < 0.05), however surface EMG of the triceps brachii did not comprehensively follow the same pattern. CONCLUSION: …
Cross-Cultural Adaptation And Validation Of An Ankle Instability Questionnaire For Use In Chinese-Speaking Population,
2017
California State University Chico
Cross-Cultural Adaptation And Validation Of An Ankle Instability Questionnaire For Use In Chinese-Speaking Population, Yumeng Li, Li Guan, Jupil Ko, Shuqi Zhang, Cathleen N. Brown, Kathy J. Simpson
Shuqi Zhang
Promoting Benefits Of Physical Activity Through Persuasive Communication,
2017
The University of Western Ontario
Promoting Benefits Of Physical Activity Through Persuasive Communication, Priynka Patil
Electronic Thesis and Dissertation Repository
Inactivity early in life can lead to inactively later in life, which can result in negative outcomes. The primary purpose was to determine if gain- or loss-framed messages about physical activity would change the attitudes, intentions, and behaviours of students in the contemplation or preparation stage of the Transtheoretical model. The secondary purpose was to determine if framing the message in terms of the physical health benefits, appearance/social benefits, or mental health benefits (benefit condition) would change attitude, intention and behaviour. Undergraduate female students (N=60) between the ages of 18 and 36 were recruited from the university. The results found …
Casein Protein Supplementation In Trained Men And Women: Morning Versus Evening,
2017
Nova Southeastern University
Casein Protein Supplementation In Trained Men And Women: Morning Versus Evening, Jose Antonio
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 479-486, 2017. The purpose of this investigation was to determine the effects of casein supplementation (54 grams) in the morning (Casein-MOR) or evening (Casein-EVE) (90 minutes or less prior to sleep) on measures of body composition and exercise performance in trained men and women. Twenty-six healthy men and women who had been training regularly for greater than 12 months completed this 8-week study (mean±SD; Casein-MOR group [n=14, seven male, seven female]: 30.0±8.2 yr; 170.7±9.5 cm; 70.9±13.9 kg. Casein-EVE group [n=12, nine male, three female]: 28.9±9.5 yr; 172.9±7.3 cm; 72.6±10.9 kg). Subjects in each group …
Assessment Of Differences In The Anthropometric, Physiological And Training Characteristics Of Finishers And Non-Finishers In A Tropical 161-Km Ultra-Marathon,
2017
Division of Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, South Africa
Assessment Of Differences In The Anthropometric, Physiological And Training Characteristics Of Finishers And Non-Finishers In A Tropical 161-Km Ultra-Marathon, Philip Ls Tan, Frankie Hy Tan, Andrew N. Bosch
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 465-478, 2017. This study aimed to compare and determine the differences in the physiological, anthropometric and training characteristics of the finishers (FIN) and non-finishers (N-FIN) in a 161-km race. Two groups of runners (FIN; N=12 and N-FIN; N=14) completed a series of anthropometric and physiological measurements over two separate sessions at least three weeks prior to the race. Training sessions starting from six weeks prior to the race were recorded. Sum of 7 skinfolds, arm and calf girths, VO2max and peak treadmill speed (PTS) were taken during session 1 while the lactate threshold (LT) …
Demands Of Simulated Commuting Using An Electrically Assisted Bicycle,
2017
University of Nebraska at Omaha
Demands Of Simulated Commuting Using An Electrically Assisted Bicycle, D. Taylor La Salle, Robert Shute, Matthew Heesch, Dustin Slivka
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 454-464, 2017. The American College of Sports Medicine (ACSM) recommends adults participate in weekly aerobic activity for a minimum of 30 minutes moderate intensity exercise 5 days per week or 20 minutes of vigorous activity 3 days per week. The electrically assisted bicycle may help individuals achieve the ACSM’s aerobic recommendations and introduce inactive individuals to physical activity. To compare the physiological requirements of riding a bicycle with electric pedal assist versus non-assist among healthy active young adults. 6 males and 6 females completed two randomized cycling trials using electric pedal assist (PAB) and …
Self-Optimization Of Stride Length Among Experienced And Inexperienced Runners,
2017
Brigham Young University
Self-Optimization Of Stride Length Among Experienced And Inexperienced Runners, Iain Hunter, James B. Tracy, Jared Ward
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 446-453, 2017. Experienced runners appear to naturally select a stride length which is optimal for minimizing oxygen uptake. However, whether this ability is naturally built into the human body or whether it is learned through experience has not been previously tested. This study investigated whether inexperienced runners are as capable as experienced runners of self-optimizing stride length to minimize oxygen uptake. Thirty-three subjects (nineteen experienced and fourteen inexperienced) ran for twenty-minutes while preferred and economical stride lengths were measured. A t-test checked for differences between the experienced and inexperienced groups in the percent increase …
A Correlational Study Of Religiosity And Total Body Fat Composition In Collegiate Populations,
2017
Bethel University
A Correlational Study Of Religiosity And Total Body Fat Composition In Collegiate Populations, Courtney Bostrum, Ryan Radtke, Seth A. Paradis
Human Kinetics & Applied Health Sciences Student Works
Previous research indicates rising levels of body fat composition in Americans. One contributing factor may be an individual’s degree of religiosity. Although not all, most studies have found religiosity to negatively impact body mass index (BMI) and obesity levels. Minimal research has been conducted regarding the relations between religiosity and body fat percentage. Not only do the overall increasing trends in body fat composition cost the American people between $48 and $68 billion per year in medical care, but excess body fat increases the risk for diabetes, cardiovascular diseases and cancer. Religious factors have been shown to play a role …
The Effect Of Loaded Backpack Usage On Balance After A Functional Daily Stair Task,
2017
Bethel University
The Effect Of Loaded Backpack Usage On Balance After A Functional Daily Stair Task, Shanni Moorse, Alyssa Haus, Seth A. Paradis
Human Kinetics & Applied Health Sciences Student Works
Backpack usage is common among many age groups, including college students. As students go about their daily routines, they may reach cardiorespiratory fatigue (CRF). CRF achieved via a treadmill workout has been shown to significantly increase body sway during balance tasks compared to pre- fatigue values. Additionally, it has been shown that increasing backpack loads decreases balance ability. PURPOSE: The purpose of this study is to combine these two ideas to assess the effect of loaded backpack usage on balance by quantitatively measuring balance after a functional daily stair task (FDST) designed to resemble CRF. METHODS: 7 male and 13 …
Hypotensive Responses Of Reciprocal Supersets Versus Traditional Resistance Training In Apparently Healthy Men,
2017
Federal University of Rio de Janeiro
Hypotensive Responses Of Reciprocal Supersets Versus Traditional Resistance Training In Apparently Healthy Men, Claudio Melibeu Bentes, Pablo B. Costa Corresponding Author, Victor Gonçalves Corrêa Neto, Roberto Simão, Gabriel Andrade Paz, Marianna Maia, Tiago Figueiredo, Gabriel Rodrigues Neto, Jefferson S. Novaes, Humberto Miranda
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 434-445, 2017. The purpose of this study was to compare the hypotensive responses of reciprocal supersets (SS) versus traditional training (TRAD) methods. Thirteen men with at least five years of recreational experience in resistance training (RT) volunteered for the study. When completing the TRAD protocol, participants performed the following exercises separately in sequence: chest press (CP), low row (LR), leg extension (LE), leg curl (LC), pull down (PD), and shoulder press (SP). The SS method required participants to complete the same exercises as in the TRAD protocol, but exercises were coupled such that muscles …
Passion For Academics And Problematic Health Behaviors,
2017
West Chester University
Passion For Academics And Problematic Health Behaviors, Alex T. Bureau, Selen Razon Ph.D, Umit Tokac, Bryan K. Saville, Lawrence W. Judge
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 417-433, 2017. According to the Dualistic Model of Passion (39), passion entails valuing, liking, and spending time on an activity. The Dualistic Model also posits two types of passion for activities: harmonious passion (individual voluntarily engages in the activity) and obsessive passion (individual is compelled to engage in the activity). The purpose of the present study was to examine the possible links between college students’ passion for academic activities and problematic health behaviors including smoking, excessive drinking, exercise addiction, disordered eating, and sleepiness, which is a possible indicator of sleep deprivation. Participants (n = …
Resistance Training Contribute To The Aerobic Components Of An Exercise Session In Adults But Not As Much In Older Adults,
2017
University of New Brunswick
Resistance Training Contribute To The Aerobic Components Of An Exercise Session In Adults But Not As Much In Older Adults, Neha Bharti, Travis Hrubeniuk, Andrea Mayo, Martin Senechal, Danielle R. Bouchard
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 406-416, 2017. Previous research has indicated that active adults are able to achieve moderate intensity as measured via heart rate during a typical resistance training (RT) session. The main objective was to identify if overweight adults and older adults can reach aerobic moderate intensity at a rate comparable to adults displaying a recommended body mass index. Twenty participants in each group were asked to visit a fitness facility twice if they self-reported doing RT for a minimum two days per week. At the first session baseline characteristics and maximal lifting capacity for each RT …
College Students’ Knowledge Of Recovery Beverage Serving Sizes,
2017
Kean University
College Students’ Knowledge Of Recovery Beverage Serving Sizes, Stephanie Lewis, Victoria Baxter, Kim Spaccarotella, Walter Andzel
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 397-405, 2017. Previous research suggests that chocolate milk may be a beneficial recovery beverage, yet little is known about how athletes and students training for careers in sports science or health-related fields interpret recommended recovery beverage serving sizes. This study examined college students’ ability to correctly apply serving size recommendations for chocolate milk and protein powder used during post-exercise recovery and assessed usual consumption of milk as a recovery beverage. College students (34 women, 39 men) poured the amount of chocolate milk they would consume within 90 minutes after exercise unaided and with the …
The Effect Of Acute Hyperglycemia On Muscular Strength, Power And Endurance,
2017
Linfield College
The Effect Of Acute Hyperglycemia On Muscular Strength, Power And Endurance, Franklin Lime-Ma, Joshua A. Cotter, Evan E. Schick
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 390-396, 2017. The purpose of this study was to elucidate the impact of acute hyperglycemia on skeletal muscle strength, power, and endurance. Ten male collegiate athletes (age 21.5 ± 1.5 years, height 186 ± 2.03 cm, body mass 108.8 ± 7.6 kg) participated in 2 testing sessions, separated by 7 days and randomized for either high glucose (HG) or control (C) treatment conditions. HG consumed a high glucose drink (2 g glucose/kg body weight) while controls consumed an isocaloric nutrition bar (40% protein, 30% fat, and 30% carbohydrate). Blood glucose (BC) levels for HG …
Better Health-Related Fitness In Youth: Implications For Public Health Guidelines,
2017
Dallas Independent School District
Better Health-Related Fitness In Youth: Implications For Public Health Guidelines, Mitch Barton, Allen W. Jackson, Scott B. Martin, James R. Morrow Jr., Trent A. Petrie, Christy A. Greenleaf
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 379-389, 2017. Public health guidelines for physical activity (PA) behaviors are being updated with 2018 as a proposed release date. Currently, ≥60 minutes of daily PA are recommended for youth. Thus, the purpose of this study was to investigate the association between reported days of aerobic PA and health-related fitness (HRF). Participants included 4448 students in grades 6-8. Self-reported days of ≥60 minutes of aerobic PA was obtained. HRF was assessed with FitnessGram. Discriminant analysis indicated that weekly days of aerobic PA related to HRF. Adolescents who participated in ≥5 days of weekly aerobic …
Time Course Of Changes In Neuromuscular Responses At 30% Versus 70% 1 Repetition Maximum During Dynamic Constant External Resistance Leg Extensions To Failure,
2017
University of Nebraska - Lincoln
Time Course Of Changes In Neuromuscular Responses At 30% Versus 70% 1 Repetition Maximum During Dynamic Constant External Resistance Leg Extensions To Failure, Cory M. Smith, Terry J. Housh, Ethan C. Hill, Richard J. Schmidt, Glen O. Johnson
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 365-378, 2017. The purpose of the current study was to examine the time course of changes in neuromuscular responses from the vastus medialis (VM) during low versus high intensity dynamic constant external resistance (DCER) leg extension muscle actions to failure. Thirteen men performed DCER leg extensions to failure at 30% and 70% 1-repetition maximum (1-RM) as well as 1-RM measurements pretest and posttest. Electromyogaphy and mechanomyographic signals were measured from the VM. There were no differences in neuromuscular responses pretest versus posttest 1-RM. There were time-dependent differences between the 30% and 70% 1-RM protocols. …
Effects Of Different Number Of Sets Of Resistance Training On Flexibility,
2017
Federal University of Rio de Janeiro, Brazil
Effects Of Different Number Of Sets Of Resistance Training On Flexibility, Thalita B. Leite, Pablo B. Costa, Richard D. Leite, Jefferson S. Novaes, Steven J. Fleck, Roberto Simão
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 354-364, 2017. The aim of this study was to investigate the effects of six months of training with three different number of sets of resistance training on flexibility in young men. Forty-seven men (mean ± SD age = 24 ± 1yrs; body mass = 79.39 ± 9.12 kg; height = 174.5 ± 5.6 cm) were randomly divided into three training groups performing either one set (G1S), three sets (G3S), or five sets (G5S) of all exercises in a resistance training session or a control group (CG). All groups were assessed pre- and post-training for …
A Low Dose Caffeine And Carbohydrate Supplement Does Not Improve Athletic Performance During Volleyball Competition,
2017
Taylor University - Upland
A Low Dose Caffeine And Carbohydrate Supplement Does Not Improve Athletic Performance During Volleyball Competition, David Pfeifer, Kelsey Arvin, Nicholas Haynes, Courtney Herschberger, Matthew S. Renfrow
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 340-353, 2017. Dietary supplements are widely used to enhance sport performance and the combination of carbohydrate and caffeine (CHO+CAF) has yielded particularly high performance gains. Though the effects of a CHO+CAF supplement have been studied in a laboratory environment, little research exists on the effects of supplementation during competition. Therefore, the purpose of this study was to determine the effects of a CHO+CAF supplement on athletic performance in competition. Eight female collegiate volleyball players completed three testing sessions under three different conditions separated by approximately one week each: CHO+CAF supplement, placebo (PBO), and control …
The Relationship Of Living Environment With Behavioral And Fitness Outcomes By Sex: An Exploratory Study In College-Aged Students,
2017
Pennsylvania State University
The Relationship Of Living Environment With Behavioral And Fitness Outcomes By Sex: An Exploratory Study In College-Aged Students, Kaelah Shaffer, Melissa Bopp, Zack Papalia, Dangaia Sims, Christopher M. Bopp
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 330-339, 2017. Although physical activity (PA) is associated with several health benefits, there is a marked decline during college years, which is an influential period for the development of health behaviors. This study examined the relationship of neighborhood and living environment with behavioral (PA and sedentary behavior) and fitness outcomes by sex. Participants were college students that participated in a fitness assessment, followed by a survey that measured self-reported exercise and perception of one’s environment (sidewalks, crime, traffic, access to PA resources in their neighborhood and/or apartment complex). Pearson correlations examined the relationship between …
How Different Respiratory Rate Patterns Affect Cardiorespiratory Variables And Performance,
2017
Doshisha University
How Different Respiratory Rate Patterns Affect Cardiorespiratory Variables And Performance, Harutiun Minas Nalbandian, Zsolt Radak, Jun Taniguchi, Masaki Takeda
International Journal of Exercise Science
International Journal of Exercise Science 10(3): 322-329, 2017. This study aims to elucidate how respiratory rate (RR) patterns may affect respiratory gas exchange variables and performance during incremental intensity- exercise. 10 healthy young men (mean ± SD, age: 20.7 ± 0.5 years, height: 174.3 ± 5.7 cm, and body mass: 72.6 ± 10.4 kg) performed three incremental tests on a cycle ergometer at three different RR (60, 45 and 30 breaths per min) in each trial. During the tests, tidal volume (TV), minute ventilation (VE), fractional content of oxygen (FeO2), fractional content of carbon dioxide (FeCO2), …
