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Articles 961 - 990 of 2299

Full-Text Articles in Physiology

Determinants Of Attendance At A Physical Activity Focused Afterschool Program In Elementary School Children, Anthony E. Crimarco, Carlene Mayfield, Nathanael G. Mitchell, Michael W. Beets, Zenong Yin, Justin B. Moore Jan 2018

Determinants Of Attendance At A Physical Activity Focused Afterschool Program In Elementary School Children, Anthony E. Crimarco, Carlene Mayfield, Nathanael G. Mitchell, Michael W. Beets, Zenong Yin, Justin B. Moore

International Journal of Exercise Science

International Journal of Exercise Science 11(5): 137-151, 2018. Afterschool youth physical activity (PA) programs provide opportunities for increasing children’s time engaged in moderate-to-vigorous physical activity (MVPA). However, low program attendance reduces the benefits of participating in these programs. The purpose of this study was to determine if enjoyment, athletic competence and motivation for PA predict youth attendance at a free afterschool PA program from 3rd to 5th grade. Data were collected from a larger randomized community trial examining the effectiveness of an afterschool program for increasing opportunities to engage in MVPA. Data were collected twice annually (fall/spring) over 3 school …

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Discrimination Against Obese Exercise Clients: An Experimental Study Of Personal Trainers, Fabio Fontana, Jonathan Bopes, Seth Bendixen, Tyler Speed, Megan George, Mickey Mack Jan 2018

Discrimination Against Obese Exercise Clients: An Experimental Study Of Personal Trainers, Fabio Fontana, Jonathan Bopes, Seth Bendixen, Tyler Speed, Megan George, Mickey Mack

International Journal of Exercise Science

International Journal of Exercise Science 11(5): 116-128, 2018. The aim of the study was to compare exercise recommendations, attitudes, and behaviors of personal trainers toward clients of different weight statuses. Fifty-two personal trainers participated in the study. The data collection was organized into two phases. In phase one, trainers read a profile and watched the video displaying an interview of either an obese or an average-weight client. Profiles and video interviews were identical except for weight status. Then, trainers provided exercise recommendations and rated their attitude toward the client. In phase two, trainers personally met an obese or an average-weight …

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Are Children And Their Parents More Active When Children Engage In More Structured Activities?, Nathan A. Chiarlitti, Angela M. Kolen Jan 2018

Are Children And Their Parents More Active When Children Engage In More Structured Activities?, Nathan A. Chiarlitti, Angela M. Kolen

International Journal of Exercise Science

International Journal of Exercise Science 11(5): 106-115, 2018. Children’s participation in sport/physical activity programs (structured activity) may play a critical role in promoting (or hindering) activity in children and their parents. The purpose of this pilot study was to determine if the amount of time children spend participating in structured activity correlates with physical activity levels (moderate to vigorous physical activity (MVPA)/day and steps/day) in children and their parents. Convenience sampling was used to collect data from 14 parent-child pairs with children ranging from ages 7-10 years. Parental and children’s daily physical activity levels (MVPA/day and steps/day) were determined from …

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An External Focus Of Attention Is Effective For Balance Control When Sleep-Deprived, Jed A. Diekfuss, James A. Janssen, Alexis B. Slutsky, Nathaniel T. Berry, Jennifer L. Etnier, Laurie Wideman, Louisa D. Raisbeck Jan 2018

An External Focus Of Attention Is Effective For Balance Control When Sleep-Deprived, Jed A. Diekfuss, James A. Janssen, Alexis B. Slutsky, Nathaniel T. Berry, Jennifer L. Etnier, Laurie Wideman, Louisa D. Raisbeck

International Journal of Exercise Science

International Journal of Exercise Science 11(5): 84-94, 2018. The purpose of our study was to examine if the beneficial effects of an external focus are effective for balance control when sleep-deprived. Sleep-deprived participants (27 hours awake) completed three blocks of five separate 30 second trials on a dynamic balance board. All participants were given internal, external, and control instruction. For the internal focus trials, participants focused on their feet; whereas, for the external focus trials, participants focused on the balance board. Participants’ time in balance was significantly greater during the external focus compared to the internal focus and control. These …

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The Effects Of Medicine Ball Training On Bat Swing Velocity In Prepubescent Softball Players, Mallory S. Kobak, Michael J. Rebold, Stacey L. Buser, Rachele M. Kappler, Ronald Otterstetter Jan 2018

The Effects Of Medicine Ball Training On Bat Swing Velocity In Prepubescent Softball Players, Mallory S. Kobak, Michael J. Rebold, Stacey L. Buser, Rachele M. Kappler, Ronald Otterstetter

International Journal of Exercise Science

International Journal of Exercise Science 11(4): 75-83, 2018. The purpose of this study was to assess the effects of an 8-week medicine ball training program on bat swing velocity in prepubescent softball players. Twenty-seven female prepubescent softball players (age = 10.2 ± 1.2) participated in this study. Participants were randomly assigned to either a medicine ball training (MB = 13) or control (CON = 14) group. Pre- and post-testing consisted of 10 dry swings using the bat that the participants would normally use during competition, which was then followed by 10 hits off of a pitching machine with …

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No Effect Of Assisted Hip Rotation On Bat Velocity, Michelle Rivera, Whitney D. Leyva, David C. Archer, Cameron N. Munger, Casey M. Watkins, Megan A. Wong, Ian J. Dobbs, Andrew J. Galpin, Jared W. Coburn, Lee E. Brown Jan 2018

No Effect Of Assisted Hip Rotation On Bat Velocity, Michelle Rivera, Whitney D. Leyva, David C. Archer, Cameron N. Munger, Casey M. Watkins, Megan A. Wong, Ian J. Dobbs, Andrew J. Galpin, Jared W. Coburn, Lee E. Brown

International Journal of Exercise Science

International Journal of Exercise Science 11(4): 68-74, 2018. Softball and baseball are games that require multiple skill sets such as throwing, hitting and fielding. Players spend a copious amount of time in batting practice in order to be successful hitters. Variables commonly associated with successful hitting include bat velocity and torso rotation. The concept of overspeed bodyweight assistance (BWA) has shown increases in vertical jump and sprint times, but not hip rotation and batting. The purpose of this study was to examine the effects of assisted hip rotation on bat velocity. Twenty-one male and female recreational softball and baseball players …

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The Effect Of A Single Bout Of High Intensity Intermittent Exercise On Glucose Tolerance In Non-Diabetic Older Adults, Hannah M. Lithgow, Melanie Leggate Jan 2018

The Effect Of A Single Bout Of High Intensity Intermittent Exercise On Glucose Tolerance In Non-Diabetic Older Adults, Hannah M. Lithgow, Melanie Leggate

International Journal of Exercise Science

International Journal of Exercise Science 11(3): 95-105, 2018. Our aim was to investigate the acute effects of a single bout of high intensity intermittent training (HIIT) on glucose tolerance and other physiological and metabolic markers in non-diabetic older adults. Fourteen healthy older adults (age, 64 ± 2 y; BMI, 25.7 ± 2.8 kg·m-2) performed two acute exercise trials: continuous moderate intensity exercise (MOD) and HIIT, with the response to an oral glucose tolerance test (OGTT) determined <24 hours after. Inflammatory, haematological, and lipid parameters were also assessed the day after each trial. There was an effect of the trials on the insulin response to an OGTT (P=0.047), but not the glucose response. Following an acute bout of HIIT, insulin concentration during an OGTT was elevated at 60 min compared to the control trial (P=0.045), indicating more insulin was secreted, but glucose concentration was unchanged in all trials. The study findings demonstrate that a single bout of HIIT affects the insulin response but not the glycaemic response to a glucose load, proffering a potential benefit for metabolic health in older adults.

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The Short-Term Effects Of Lying, Sitting And Standing On Energy Expenditure In Women, Collin Popp, William C. Bridges, Elliot D. Jesch Jan 2018

The Short-Term Effects Of Lying, Sitting And Standing On Energy Expenditure In Women, Collin Popp, William C. Bridges, Elliot D. Jesch

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 129-136, 2018. The deleterious health effects of too much sitting have been associated with an increased risk for overweight and obesity. Replacing sitting with standing is the proposed intervention to increase daily energy expenditure (EE). The purpose of this study was to determine the short-term effects of lying, sitting, and standing postures on EE, and determine the magnitude of the effect each posture has on EE using indirect calorimetry (IC). Twenty-eight healthy females performed three separate positions (lying, sitting, standing) in random order. Inspired and expired gases were collected for 45-minutes (15 minutes for …

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Effects Of Strength Training Sessions Performed With Different Exercise Orders And Intervals On Blood Pressure And Heart Rate Variability, Sandro Lemos, Tiago Figueiredo, Silvio Marques, Thalita Leite, Diogo Cardozo, Jeffrey Willardson, Roberto Simão Jan 2018

Effects Of Strength Training Sessions Performed With Different Exercise Orders And Intervals On Blood Pressure And Heart Rate Variability, Sandro Lemos, Tiago Figueiredo, Silvio Marques, Thalita Leite, Diogo Cardozo, Jeffrey Willardson, Roberto Simão

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 55-67, 2018. This study compared the effect of a strength training session performed at different exercise orders and rest intervals on blood pressure and heart rate variability (HRV). Fifteen trained men performed different upper body exercise sequences [large to small muscle mass (SEQA) and small to large muscle mass (SEQB)] in randomized order with rest intervals between sets and exercises of 40 or 90 seconds. Fifteen repetition maximum loads were tested to control the training intensity and the total volume load. The results showed, significant reductions for systolic blood pressure (SBP) for all sequences …

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Serum Tumor Necrosis Factor-Alpha Associates With Myocardial Oxygen Demand And Exercise Tolerance In Postmenopausal Women, Stephen J. Carter, David R. Bryan, William H. Neumeier, Stephen P. Glasser, Gary R. Hunter Jan 2018

Serum Tumor Necrosis Factor-Alpha Associates With Myocardial Oxygen Demand And Exercise Tolerance In Postmenopausal Women, Stephen J. Carter, David R. Bryan, William H. Neumeier, Stephen P. Glasser, Gary R. Hunter

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 42-54, 2018. The functional implications of serum tumor necrosis factor-alpha (TNF-a), a marker of oxidative stress, on hemodynamic parameters at rest and during physical exertion are unclear. The aims of this investigation were to examine the independent associations of TNF-a on myocardial oxygen demand at rest and during submaximal exercise, while also evaluating the association of TNF-a on exercise tolerance. Forty, postmenopausal women, provided blood samples and completed a modified-Balke protocol to measure maximal oxygen uptake (VO2max). Large artery compliance was measured by pulse contour analyses while rate-pressure product (RPP), an index …

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Six Weeks Of Moderate Functional Resistance Training Increases Basal Metabolic Rate In Sedentary Adult Women, Jon Stavres, Mcauley P. Zeigler, M. Pasternostro Bayles Jan 2018

Six Weeks Of Moderate Functional Resistance Training Increases Basal Metabolic Rate In Sedentary Adult Women, Jon Stavres, Mcauley P. Zeigler, M. Pasternostro Bayles

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 32-41, 2018. Basal metabolic rate (BMR) is a significant contributor to total daily energy expenditure. Traditional resistance exercise has been shown to elicit fat free mass (FFM) related increases in BMR. The purpose of this study was to examine the effect of a functional resistance exercise program on the BMR of a group of previously sedentary adult women in a free-living condition. 19 sedentary, apparently healthy women underwent body composition analysis and had BMR assessed before and after a 6-week functional resistance training program. The resistance training program was designed to be progressive in …

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Acute Cardiovascular Responses After A Single Bout Blood Flow Restriction Training, Moisés Picón Martínez, Iván Chulvi Medrano, Juan Manuel Cortell Tormo, Juan Tortosa, Yasser Alkhadar, José Sanchís, Gilberto Laurentino Jan 2018

Acute Cardiovascular Responses After A Single Bout Blood Flow Restriction Training, Moisés Picón Martínez, Iván Chulvi Medrano, Juan Manuel Cortell Tormo, Juan Tortosa, Yasser Alkhadar, José Sanchís, Gilberto Laurentino

International Journal of Exercise Science

International Journal of Exercise Science 11(2): 20-31, 2018. Different types of exercise might produce reductions in blood pressure (BP). One physiological mechanism that could explain the lowering adaptation effect on BP after an exercise program is an improved in baroreflex control of muscle sympathetic nerve activity. Consequently, exploring the different methods of training and their post-exercise hypotension (PEH) becomes of interest for healthcare providers. Recently, it has been suggested that blood flow restriction training (BFR) can generate PEH. The aim of this study was to determine the acute response on cardiovascular variables after low intensity resistance training with BFR in …

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Comparison Of Varying Heel To Toe Differences And Cushion To Barefoot Running In Novice Minimalist Runners, Daniel C. Moody, Iain Hunter, William J. Myrer Jan 2018

Comparison Of Varying Heel To Toe Differences And Cushion To Barefoot Running In Novice Minimalist Runners, Daniel C. Moody, Iain Hunter, William J. Myrer

International Journal of Exercise Science

International Journal of Exercise Science 11(1): 13-19, 2018. There are many different types of footwear available for runners in today’s market. Many of these shoes claim to help runners run more efficiently by altering an individual’s stride mechanics. Minimalist footwear claims to aid runners run more on their forefeet whereas more traditional footwear provides more cushioning specifically for a heel first landing. The purpose of this paper was to determine if runners, who were accustomed to running in traditional footwear would alter their running mechanics while running acutely in various types of minimalist footwear. Twelve subjects, accustomed to running in …

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Dynamic Stability In Gymnasts, Non-Balance Athletes, And Active Controls, Hope Sloanhoffer, Kathryn Harrison, Jean L. Mccrory Phd Jan 2018

Dynamic Stability In Gymnasts, Non-Balance Athletes, And Active Controls, Hope Sloanhoffer, Kathryn Harrison, Jean L. Mccrory Phd

International Journal of Exercise Science

International Journal of Exercise Science 11(1): 1-12, 2018. Gymnastics by nature is a balance sport requiring both static and dynamic stability. To our knowledge, the center of pressure (COP) movement of collegiate gymnasts has not been compared to other collegiate athletes and healthy controls during static and dynamic postural stability tasks. Our purpose was to investigate static and dynamic stability in collegiate gymnasts, non-gymnast athletes and non-athlete controls. Data were collected on female university gymnasts (n=10), university athletes in other sports (n=10), and active non-athlete controls (n=10). Static balance was measured using a commercially available six-condition static test and dynamic …

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The Effects Of Overfeeding On Body Composition: The Role Of Macronutrient Composition - A Narrative Review, Alex Leaf, Jose Antonio Nov 2017

The Effects Of Overfeeding On Body Composition: The Role Of Macronutrient Composition - A Narrative Review, Alex Leaf, Jose Antonio

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1275-1296, 2017. Compared to investigations on hypocaloric diets, the effects of chronic overfeeding have been less studied. It has been posited that consuming calories in excess of daily caloric requirements will result in a gain in body weight and in particular fat mass regardless of which macronutrient(s) are consumed. However, recent evidence suggests that there is a quantitative difference in protein versus carbohydrate and/or fat overfeeding as it relates to body composition. Protein overfeeding or the consumption of a high protein diet may not result in a gain in body weight or fat mass …

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Effects Of Environmental Context On Physiological Response During Team Handball Small Sided Games, Jan Bělka, Karel Hulka, Iva Machová, Michal Šafář, Radim Weisser, David M. Bellar, Donald L. Hoover, Lawrence W. Judge Nov 2017

Effects Of Environmental Context On Physiological Response During Team Handball Small Sided Games, Jan Bělka, Karel Hulka, Iva Machová, Michal Šafář, Radim Weisser, David M. Bellar, Donald L. Hoover, Lawrence W. Judge

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1263-1274, 2017. This study examined the distance covered and physiological effects of altering the number of players during small-sided games (SSG) in team handball. Twelve professional female handball players [24.6±3.7 years, 172±6.2 cm, 68.2 ± 9.9kg, 22.7 ± 2 kg/m2] participated in this study. The SSG were played, first with five on each side (SSG 5), then four (SSG 4), then three (SSG 3). Each game was four minutes long, followed by three minutes of rest. The distance covered and time spent in four speed zones (based on player movement speed) were …

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The Body Mass Index Of San Francisco Cold Water Swimmers - Comparisons To U.S. National And Local Populations, And Pool Swimmers, Brendan T. Crow, Ellicott C. Matthay, Stephen P. Schatz, Mark D. Debeliso, Thomas J. Nuckton Nov 2017

The Body Mass Index Of San Francisco Cold Water Swimmers - Comparisons To U.S. National And Local Populations, And Pool Swimmers, Brendan T. Crow, Ellicott C. Matthay, Stephen P. Schatz, Mark D. Debeliso, Thomas J. Nuckton

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1250-1262, 2017. To determine if cold-water swimmers have substantial differences in BMI, which might have a protective effect against heat loss during swims in cold water without wetsuits, and to determine if obesity is more or less prevalent in cold-water swimmers, we compared the body mass index (BMI) values of 103 recreational open-water swimmers (mean age 54.3 ±10.8 years) to data from various population groups. Swimmers swam consistently throughout the winter months, in the San Francisco Bay (water temperature range: 9.6° C [49.3 ° F] to 12.6° C [54.7 ° F]), without wetsuits. After …

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A Comparison Of Body Composition Across Two Phases Of The Menstrual Cycle Utilizing Dual-Energy X-Ray Absorptiometry, Air Displacement Plethysmography, And Bioelectrical Impedance Analysis, Courtenay S. Hicks, Cherilyn N. Mclester, Tiffany A. Esmat, John R. Mclester Nov 2017

A Comparison Of Body Composition Across Two Phases Of The Menstrual Cycle Utilizing Dual-Energy X-Ray Absorptiometry, Air Displacement Plethysmography, And Bioelectrical Impedance Analysis, Courtenay S. Hicks, Cherilyn N. Mclester, Tiffany A. Esmat, John R. Mclester

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1235-1249, 2017. The purpose of this investigation was to utilize several different technologies to compare body composition results across two phases of the menstrual cycle, and to investigate whether being on hormonal birth control or not has any effect on results. The secondary purpose was to determine if body satisfaction or perception of fluid retention differed across phases or between groups. A total of 39 females with a mean age of 26 ± 7 yrs were included in the study, 15 were on hormonal birth control (BC) and 24 were not (non-BC). Participants came …

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Achilles Tendon Cross Sectional Area Changes Over A Division 1 Ncaa Cross Country Season, Joshua Sponbeck, Candace Perkins, Matthew Berg, Justin Rigby Nov 2017

Achilles Tendon Cross Sectional Area Changes Over A Division 1 Ncaa Cross Country Season, Joshua Sponbeck, Candace Perkins, Matthew Berg, Justin Rigby

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1226-1234, 2017. Tracking Achilles tendon cross sectional area (CSA) changes may help clinicians understand exercise adaptations and Achilles tendon injury mechanisms. To track adaptations in the Achilles tendon in response to a cross country season. Design: Longitudinal study. Musculoskeletal (MSK) ultrasound images were obtained in a research laboratory. Cross country athletes ran with no restrictions outdoors and indoors. Participants were Division I NCAA cross country athletes (N = 24, age = 19.9 ± 2.1 years, mass = 61.32 ± 20.16 kg, height = 168.92 ± 17.16 cm, sex = 8 males and 16 females). …

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The Efficacy Of Handheld Resistive Exercise Device (Hred) Training On Wellness Outcomes In Older Adults, Brian D. Clocksin, Ryan Harrison, Andrew Douglas Nov 2017

The Efficacy Of Handheld Resistive Exercise Device (Hred) Training On Wellness Outcomes In Older Adults, Brian D. Clocksin, Ryan Harrison, Andrew Douglas

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1208-1225, 2017. The primary purpose of this study was to examine the efficacy of Handheld Resistive Exercise Device (HRED) training on wellness outcomes in older adults. A secondary purpose was to assess the utilization of an HRED in older adult fitness program. A group of healthy, active older adults (N=28, 76.6 ± 6.7 years old) volunteered to complete a 10-week HRED training program. Pre- and post-intervention changes were evaluated for muscular strength, static balance, mobility, fall-efficacy, and self-efficacy for activities of daily living. Significant improvement was seen in muscular strength (grip strength, p < 0.01), mobility (TUG time, p …

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Comparison Of Isokinetic Knee Flexion And Extension Strength Between Trained Dancers And Traditional Sport Female Collegiate Athletes, Rachele E. Vogelpohl, Lynn Wolz, Tyler Neltner, Zachariah Burkhardt, Tracey L. Bonner, Hayley M. Ericksen Nov 2017

Comparison Of Isokinetic Knee Flexion And Extension Strength Between Trained Dancers And Traditional Sport Female Collegiate Athletes, Rachele E. Vogelpohl, Lynn Wolz, Tyler Neltner, Zachariah Burkhardt, Tracey L. Bonner, Hayley M. Ericksen

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1196-1207, 2017. Traditional sport athletes and dancers experience various injuries while participating in their respective sport. Injury rates, especially to the anterior cruciate ligament (ACL), differ between these populations. Isometric and isokinetic strength and hamstring:quadriceps (H:Q) ratios may help to explain the difference in ACL injury rates between these populations. The purpose of this investigation was to determine the difference in isometric and concentric knee flexion and extension peak torque, and H:Q strength ratios between female dancers and division I collegiate soccer and track and field athletes. Seventeen dancers (20.53±1.51yrs, 65.60±2.06in, 62.29±8.63kg) and 24 …

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Resistance Exercise Training On Disease Impact, Pain Catastrophizing And Autonomic Modulation In Women With Fibromyalgia, Alaina Glasgow, Tori M. Stone, J. Derek Kingsley Nov 2017

Resistance Exercise Training On Disease Impact, Pain Catastrophizing And Autonomic Modulation In Women With Fibromyalgia, Alaina Glasgow, Tori M. Stone, J. Derek Kingsley

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1184-1195, 2017. Women with fibromyalgia (FM) often complain of whole-body pain, and muscle fatigue, which may be related to autonomic dysfunction. Therefore, the purpose of the present study was to investigate the effects of resistance exercise training (RET) on disease impact, pain catastrophizing, and autonomic modulation in women with FM. Women with FM (n=26) and healthy control women (HC: n=9), aged 19-65 yrs, were compared at rest. Women with FM were randomly assigned to a resistance-training group (FM-RT: n=14) or a non-exercising control group (FM-CON: n=12). Women in the FM-RT group underwent 8-weeks of …

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The Effect Of Task Complexity Influencing Bilateral Transfer., Dawson J. Kidgell, Ashlyn K. Frazer, Alan J. Pearce Nov 2017

The Effect Of Task Complexity Influencing Bilateral Transfer., Dawson J. Kidgell, Ashlyn K. Frazer, Alan J. Pearce

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1174-1183, 2017. Bilateral transfer is a well-known phenomenon whereby training one limb results in improvement in the untrained homologous limb. However, despite evidence across a range of motor skill paradigms, the influence of motor skill complexity on the magnitude of bilateral transfer has not yet been fully explored. The aim of this preliminary study was to compare bilateral transfer effects between three dexterity tasks with the hypothesis that the complexity of the task, the volume of time training, and the amount of improvement in the trained hand would positively influence bilateral transfer. Using a …

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Extreme Conditioning Program Induced Acute Hypotensive Effects Are Independent Of The Exercise Session Intensity, Ramires Alsamir Tibana, Leonardo Mesquita Almeida, Ivo Vieira De Sousa Neto, Nuno Manoel Frade De Sousa, Jeeser Alves De Almeida, Belmiro Freitas De Salles, Claudio Melibeu Bentes, Fabricio Azevedo Voltarelli, Scott Collier, Jonato Prestes Nov 2017

Extreme Conditioning Program Induced Acute Hypotensive Effects Are Independent Of The Exercise Session Intensity, Ramires Alsamir Tibana, Leonardo Mesquita Almeida, Ivo Vieira De Sousa Neto, Nuno Manoel Frade De Sousa, Jeeser Alves De Almeida, Belmiro Freitas De Salles, Claudio Melibeu Bentes, Fabricio Azevedo Voltarelli, Scott Collier, Jonato Prestes

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1165-1173, 2017. The aim of the study was to determine the acute systolic (SBP) and diastolic (DBP) blood pressure, rating of perceived exertion (RPE) and heart rate (HR) responses following two intense training sessions (24 hours apart). Nine male extreme conditioning program (ECP) practitioners with more than 6 months of experience (age 26.7 ± 6.6 years; body mass 78.8 ± 13.2 kg; body fat 13.5 ± 6.2 %) completed two experimental ECP sessions. Cardiovascular variables were measured before, immediately after and every 15 min during a 45 min recovery following each experimental session. Compared …

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The Relative Age Effect In Soccer: An Analysis Of The U20 Libertadores Cup, Fabio A D Campos, Leandra C B Campos, Idico L. Pellegrinotti, Miguel A. Gómez Nov 2017

The Relative Age Effect In Soccer: An Analysis Of The U20 Libertadores Cup, Fabio A D Campos, Leandra C B Campos, Idico L. Pellegrinotti, Miguel A. Gómez

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1157-1164, 2017. The year of birth is used as a criterion for grouping the competitive categories in various sports. Young players that were born in the early months of the calendar can have a benefit during their formative process, since they have higher chronological age and, consequently, are more likely to be in more advanced stages of biological maturation. The aim of this study was to evaluate the Relative Age Effect (RAE) in the U-20 Libertadores Cup. The sample consisted of 228 young players belonging to 12 clubs (ten different countries) who vied for …

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Effect Of Seat Tube Angle And Exercise Intensity On Muscle Activity Patterns In Cyclists, Will Duggan, Bernard Donne, Neil Fleming Nov 2017

Effect Of Seat Tube Angle And Exercise Intensity On Muscle Activity Patterns In Cyclists, Will Duggan, Bernard Donne, Neil Fleming

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1145-1156, 2017. Previous studies have reported improved efficiency at steeper seat tube angle (STA) during ergometer cycling; however, neuromuscular mechanisms have yet to be fully determined. The current study investigated effects of STA on lower limb EMG activity at varying exercise intensities. Cyclists (n=11) were tested at 2 workloads; 160W and an individualised workload (IWL) equivalent to lactate threshold (TLac) minus 10%δ (derived from maximal incremental data), using 3 STA (70, 75 and 80°). Electromyographic data from Vastus Medialis (VM), Rectus Femoris (RF), Vastus Lateralis (VL) and Biceps Femoris (BF) were assessed. …

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Exertional Observation In Adults Performing Intermittent Treadmill Walking And Running, Michael Gallagher Jr., Robert J. Robertson, Fredric L. Goss, Irene Kane, Elizabeth F. Nagle, Kathryn A. Tessmer Nov 2017

Exertional Observation In Adults Performing Intermittent Treadmill Walking And Running, Michael Gallagher Jr., Robert J. Robertson, Fredric L. Goss, Irene Kane, Elizabeth F. Nagle, Kathryn A. Tessmer

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1130-1144, 2017. The present investigation examined the Adult OMNI Walk-Run Scale for use by an independent observer to rate an individual’s perception of exertion during intermittent treadmill walking and running. Forty (22.4 ± 2.9 yrs) recreationally active males (n = 18) and females (n = 22) completed three 5-min intermittent bouts of treadmill exercise. The exercise bouts were a level walk (LW; 4.0 km∙hr-1, 0% grade), hill walk (HW; 5.6 km∙hr-1, 5% grade), and run (R; 8 km∙hr-1, 2.5% grade). Each bout was separated by a 5-min recovery …

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An Assessment Of Sedentary Time Among Undergraduate Students At A Canadian University, Marc S. Moulin, Jennifer D. Irwin Nov 2017

An Assessment Of Sedentary Time Among Undergraduate Students At A Canadian University, Marc S. Moulin, Jennifer D. Irwin

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1116-1129, 2017. The purpose of this study was to calculate a total daily sedentary time for the undergraduate population at a large urban Canadian University and investigate student perceptions of the facilitators and barriers to engaging in a less sedentary lifestyle. A sample of 335 participants responded to an online questionnaire that included the SIT-Q and open-ended questions, with 102 providing sufficient data to be included in the quantitative analysis and 145 in the qualitative analysis. Students spent an average of 11.88 ± 3.46 hrs/day engaged in sedentary behaviors. Three themes were identified as …

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The Effect Of Biofeedback Training On One Repetition Maximum Chest Press Performance, Joann C. Wakefield, Amber M. Shipherd Nov 2017

The Effect Of Biofeedback Training On One Repetition Maximum Chest Press Performance, Joann C. Wakefield, Amber M. Shipherd

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1105-1115, 2017. Biofeedback is a method of controlling normally automatic bodily functions by monitoring and training to acquire voluntary control over them (13). The purpose of this study was to determine if a heart-rate variability training program utilizing the emWave biofeedback device could increase performance on a simple strength task. Participants (n = 18) were randomly assigned to one of three groups and data were collected for a period of seven weeks. Data collection consisted of participants receiving training (experimental and alternate groups) or no training (control group), followed by a chest press one …

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The Role Of Social Physique Anxiety, Social Support, And Perceived Benefits And Barriers To Exercise In An All-Female Fitness Camp Intervention, Lauren Easton, Brandonn Harris, Daniel Czech, Ashley D. Walker Nov 2017

The Role Of Social Physique Anxiety, Social Support, And Perceived Benefits And Barriers To Exercise In An All-Female Fitness Camp Intervention, Lauren Easton, Brandonn Harris, Daniel Czech, Ashley D. Walker

International Journal of Exercise Science

International Journal of Exercise Science 10(8): 1094-1104, 2017. Only 20.3% of American adults meet the Center for Disease Control’s minimum recommended volume of exercise for anaerobic and aerobic physical activities (11). This small proportion representing those who reach the suggested physical activity levels is an issue of concern for researchers and practitioners in health-related disciplines; further, the Centers for Disease Control report that physical inactivity levels are even higher for women than those of males. In 2008, only 42% of women 18 years and older met the minimal federal levels of aerobic activity through leisure-time aerobic activity (2). This statistic …

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