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Articles 541 - 570 of 2299
Full-Text Articles in Physiology
Effect Of Test Sequence On Maximal Anaerobic And Aerobic Power Achievement In Adults, Luke E. Stong, Luke Haile, Kyle S. Beyer, Joseph L. Andreacci
Effect Of Test Sequence On Maximal Anaerobic And Aerobic Power Achievement In Adults, Luke E. Stong, Luke Haile, Kyle S. Beyer, Joseph L. Andreacci
International Journal of Exercise Science
International Journal of Exercise Science 14(4): 657-665, 2021. The purpose of this study was to examine the effect of test sequence on adults’ ability to achieve maximal aerobic and anaerobic power during a single assessment visit. Forty-one adults (24 men, 17 women; 22.0 ± 1.8 years) completed two baseline visits in randomized order consisting of either a maximal oxygen consumption (V̇O2max) or Wingate anaerobic test (WAnT). The subsequent experimental visit consisted of both V̇O2max and WAnT in randomized order separated by 20 minutes of rest. Mixed-model ANOVAs compared baseline and experimental performance between and within groups. Chi …
Order Of Resistance Training Cycles To Develop Strength And Muscle Thickness In Resistance-Trained Men: A Pilot Study, Julio Benvenutti Bueno De Camargo, Felipe Brigatto, Tiago Volpi Braz, Moisés Diego Germano, Gabriela Silva Nascimento, Raphael Machado Da Conceição, Ivan Teixeira, Tulio Sanches, Marcelo Saldanha Aoki, Charles Ricardo Lopes
Order Of Resistance Training Cycles To Develop Strength And Muscle Thickness In Resistance-Trained Men: A Pilot Study, Julio Benvenutti Bueno De Camargo, Felipe Brigatto, Tiago Volpi Braz, Moisés Diego Germano, Gabriela Silva Nascimento, Raphael Machado Da Conceição, Ivan Teixeira, Tulio Sanches, Marcelo Saldanha Aoki, Charles Ricardo Lopes
International Journal of Exercise Science
International Journal of Exercise Science 14(4): 644-656, 2021. The aim of the present study was to assess the chronic effects of different order of resistance training cycles on strength and muscle thickness of recreationally resistance-trained men. The study sample was composed of 16 healthy men (age: 25.0 ± 3.8 years, height: 1.77 ± 7.6 cm, total body mass: 81.7 ± 10.4 kg, RT experience: 4.6 ± 0.7 years, relative bench press one repetition maximum: 1.2 ± 0.1, relative squat one-repetition maximum: 1.5 ± 0.2). According to baseline maximal strength, participants were allocated in one of the following groups: Maximal Strength-Strength …
Battery Fitness Testing In Law Enforcement: A Critical Review Of The Literature, Mohammad M. Zulfiqar, Jennifer Wooland, Ben Schram, J. Jay Dawes, Robert G. Lockie, Robin Marc Orr
Battery Fitness Testing In Law Enforcement: A Critical Review Of The Literature, Mohammad M. Zulfiqar, Jennifer Wooland, Ben Schram, J. Jay Dawes, Robert G. Lockie, Robin Marc Orr
International Journal of Exercise Science
International Journal of Exercise Science 14(4): 613-632, 2021. Police trainees undergoing training to prepare them for the occupational demands of policing are often subjected to fitness testing. The aim of this review was to critically appraise research studies employing police fitness tests. Method: A comprehensive search of four databases (PubMed, EMBASE, and Ebscohost [CINAHL and SportDiscus]) was conducted by two authors independently. After duplicate articles were removed, articles that did not meet the pre-determined inclusion criteria and met the exclusion criteria were removed. The remaining studies were critically appraised by two authors independently using a Downs and Black Checklist. Cohen’s …
Effects Of Sex And Load Carried Per Kilogram Of Body Mass On Landing Technique, Jacob M. Thomas, Roger O. Kollock, William D. Hale, Alex Long, August Bont, Jay Dawes, Gabe Sanders
Effects Of Sex And Load Carried Per Kilogram Of Body Mass On Landing Technique, Jacob M. Thomas, Roger O. Kollock, William D. Hale, Alex Long, August Bont, Jay Dawes, Gabe Sanders
International Journal of Exercise Science
International Journal of Exercise Science 14(1): 633-643, 2021. Sex differences and heavy load carriage may contribute to the high rate of musculoskeletal injury in military recruits, particularly within the female population. Thus, the purposes of this study were to determine if load influenced landing quality differently in females compared to males and if load carried per kg body mass was associated to quality of landing. Twenty-eight participants were recruited for this study (males: n = 14; females: n = 14). Participants were grouped by sex. All twenty-eight participants performed three drop-jumps (DJ) under unloaded and loaded conditions. The loaded condition …
Growing The Youth Olympic Games: Comparing Millennial Generation Sport Festival Engagement, Lawrence W. Judge, Jeffrey C. Petersen, David M. Bellar, Leeann M. Lower, Makenzie A. Schoeff, Amy S. Blake, Dagny Zupin, Nick Nordmann
Growing The Youth Olympic Games: Comparing Millennial Generation Sport Festival Engagement, Lawrence W. Judge, Jeffrey C. Petersen, David M. Bellar, Leeann M. Lower, Makenzie A. Schoeff, Amy S. Blake, Dagny Zupin, Nick Nordmann
International Journal of Exercise Science
International Journal of Exercise Science 14(6): 578-593, 2021. Despite the continued growth of the Olympic Games (OG), the Youth Olympic Games (YOG) has received minimal attention from mainstream media since its introduction in 2010. The purpose of this study was to examine and compare event awareness and consumption intention for the 2012 Winter YOG to two international sport events occurring in the same year. A survey instrument was utilized to examine and compare event awareness, consumption intention, and logo identification for three international sport events within a millennial generation sample. The study showed significant differences in personal and public awareness …
Interlimb Asymmetry Thresholds That Negatively Affect Change Of Direction Performance In Collegiate American Football Players, Nicolas M. Philipp, Derek A. Crawford, Matthew J. Garver, Dustin W. Davis, Josie Hair
Interlimb Asymmetry Thresholds That Negatively Affect Change Of Direction Performance In Collegiate American Football Players, Nicolas M. Philipp, Derek A. Crawford, Matthew J. Garver, Dustin W. Davis, Josie Hair
International Journal of Exercise Science
International Journal of Exercise Science 14(4): 606-612, 2021. Researchers and strength and conditioning practitioners have had an increased interest in the effects of interlimb asymmetries on different aspects of sport performance over the past couple of years. Interlimb asymmetries have been found to negatively affect performance in key performance indicators (KPI) such as jumping, sprinting, and changing directions, within various sports populations. However, there is no consensus about a meaningful threshold at which asymmetries start to negatively affect KPIs or performance. The aim of this study was to investigate a potentially meaningful threshold for three asymmetry metrics (mean peak velocity …
Lack Of Correlation Between Natural Pelvic Tilt Angle With Hip Range Of Motion, And Hip Muscle Torque Ratio, Maria Cristina Herrera, Tal Amasay, Claire Egret
Lack Of Correlation Between Natural Pelvic Tilt Angle With Hip Range Of Motion, And Hip Muscle Torque Ratio, Maria Cristina Herrera, Tal Amasay, Claire Egret
International Journal of Exercise Science
International Journal of Exercise Science 14(1): 594-605, 2021. Excessive anterior and posterior pelvic tilts (PT) angles are associated with overuse injuries of the lower limbs and of the lumbo-pelvic-hip complex. There is a lack of evidence that correlates anterior and posterior PT angles with limited hip internal rotation (IR) and external rotation (ER), and hip muscles torque ratios. The purpose of this study was to examine the correlation between averaged anterior/posterior PT angle in standing position and hip IR and ER range of motion (ROM), hip adductors and abductors (Add/Abd) torque ratio, and hip flexors and extensors (Flexor/Extensor) torque ratio. …
Evaluating The Intra-Rater And Inter-Rater Reliability Of Fixed Tension Scale Instrumentation For Determining Isometric Neck Strength, Alexander T. Mcdaniel, Lindsey Schroeder, Jessica Freedman, Yishi Wang, Michel J.H. Heijnen
Evaluating The Intra-Rater And Inter-Rater Reliability Of Fixed Tension Scale Instrumentation For Determining Isometric Neck Strength, Alexander T. Mcdaniel, Lindsey Schroeder, Jessica Freedman, Yishi Wang, Michel J.H. Heijnen
International Journal of Exercise Science
International Journal of Exercise Science 14(3): 563-577, 2021. PURPOSE: The purpose of this study was to evaluate the reliability of a fixed tension scale instrumentation, comparing the intra-rater and inter-rater reliability between seating and standing measurement techniques. Instrumentation developed from this study will be utilized to assess isometric neck strength in future studies comparing neck strengthening protocols. METHODS: Isometric neck strength for eight movements (cervical/capital flexion, cervical/capital extension, left/right lateral flexion, left/right cervical rotation) as well as anthropometric measurements were evaluated for thirty-one participants through the use of a novel neck strength assessment protocol. RESULTS: The fixed tension scale instrumentation …
The Effect Of Shin-Torso Alignment On Muscle Activity And Joint Angles Of The Lower Extremity In Collegiate Ice Hockey Players, Noah A. Pring, Stacy L. Solomon, Andy Obrien, Ryan T. Conners, Paul N. Whitehead
The Effect Of Shin-Torso Alignment On Muscle Activity And Joint Angles Of The Lower Extremity In Collegiate Ice Hockey Players, Noah A. Pring, Stacy L. Solomon, Andy Obrien, Ryan T. Conners, Paul N. Whitehead
International Journal of Exercise Science
International Journal of Exercise Science 14(1): 552-562, 2021. Ice hockey is prevalent with injuries due to fatigue-related degradation of mechanics occurring throughout a season. The player’s skating position is vital because it can impact muscle activation patterns of the lower extremity. If too much stress is placed on a muscle, it could lead to muscle fatigue and increased likelihood of injury. The purpose of this study was to measure muscle activation patterns and joint angle changes of the lower extremity in ice hockey players during three different simulated skating positions. Electromyography sensors were placed on muscles of the quadriceps, hamstrings, …
Lower Limb Force Asymmetries During Landing And Jumping Exercises: A Pilot Study, Simon M. Cone, Sangwoo Lee
Lower Limb Force Asymmetries During Landing And Jumping Exercises: A Pilot Study, Simon M. Cone, Sangwoo Lee
International Journal of Exercise Science
International Journal of Exercise Science 14(1): 544-551, 2021. Significant asymmetries can exist between the lower limbs’ force production during the take-off phase of bilateral jumping exercises. Some studies have indicated that similar asymmetries can also exist during the landing phase. It has not been demonstrated if the magnitude of lower body asymmetry was similar between the landing (L) and take-off (TO) phases of bilateral jumping movements. The main purpose of this study was to compare the asymmetry measured during the L and TO phases of bilateral jumping exercises to determine if there was a difference in asymmetry between the phases. …
Physiological Responses To Active Video Games Compared To Treadmill Walking And Tv Watching In Obese Children And Adolescents, Ramzi Majaj, Trent Scott, Ryan Moran, Dana Kimberly, Tamekia Jones, Webb Smith
Physiological Responses To Active Video Games Compared To Treadmill Walking And Tv Watching In Obese Children And Adolescents, Ramzi Majaj, Trent Scott, Ryan Moran, Dana Kimberly, Tamekia Jones, Webb Smith
International Journal of Exercise Science
International Journal of Exercise Science 14(7): 519-532, 2021. The purpose of this study was to examine the physiological responses to playing different active video games (AVG), as well as document the activity level exerted during AVG in relation to treadmill walking (TM) and watching television (TV). 20 youth (age 11-17 yr) with obesity were recruited from the Healthy Lifestyle Clinic and underwent testing under six randomized conditions: 1) TM, 2) TV, 3) Fitnexx, 4) river rush (RRH), 5) reflex ridge (RFR), and 6) space pop (SP). RRH, RFR, and SP are active video games for the Xbox 360. Fitnexx is …
Biomechanical Differences Between The Bulgarian Split-Squat And Back Squat, Ethan R. Mackey, Bryan L. Riemann
Biomechanical Differences Between The Bulgarian Split-Squat And Back Squat, Ethan R. Mackey, Bryan L. Riemann
International Journal of Exercise Science
International Journal of Exercise Science 14(1): 533-543, 2021. The Bulgarian split squat (BSS) is a unilateral lower extremity strength exercise; however, the mechanical demands have not been fully elucidated. The purpose of this study was to compare ankle, knee, and hip joint net joint moment impulse (NJMI), work (NJW), peak net joint moment (NJM) and peak displacement between the BSS and traditional bilateral back squat (BS). Following a practice and 1-repetition maximum (1-RM) session, 2x3 BS (70% 1-RM) and BSS (35% 1-RM) were completed by twenty resistance trained males (24.20 ± 2.50 yrs, 1.76 ± 0.06m, 85.3 ± 13.90 kg). …
Becoming One With Nature: A Nature Intervention For Individuals Living With Cancer Participating In A Ten-Week Group Exercise And Wellness Program, Samantha L. Morris, Ian Newhouse, Tracey Larocque, Kelly-Jo Gillis, Leanne Smith, Elizabeth K. Nisbet
Becoming One With Nature: A Nature Intervention For Individuals Living With Cancer Participating In A Ten-Week Group Exercise And Wellness Program, Samantha L. Morris, Ian Newhouse, Tracey Larocque, Kelly-Jo Gillis, Leanne Smith, Elizabeth K. Nisbet
International Journal of Exercise Science
International Journal of Exercise Science 14(3): 498-518, 2021. Positive outcomes for psychological and physiological health have resulted from a nature experience. However, evidence is limited for nature-based interventions and their effect on a cancer population. The purpose of this mixed-methods study was to determine if incorporating the One Nature Challenge (ONC) into a ten-week group exercise program (WE-Can) for individuals living with cancer could offer additional psychological and/or physiological benefits to those previously observed in WE-Can. For this study, two separate ONCs were implemented throughout two seasons (summer and winter) to formulate a ONC group (n = 18; 60 ± …
Leucine Supplementation Does Not Improve Muscle Recovery From Resistance Exercise In Young Adults: A Randomized, Double-Blinded, Crossover Study, Jeferson L. Jacinto, João Pedro Nunes, Alex S. Ribeiro, Juliano Casonato, Mirela C. Roveratti, Bruna N. S. Sena, Edilson S. Cyrino, Rubens A. Da Silva, Andreo F. Aguiar
Leucine Supplementation Does Not Improve Muscle Recovery From Resistance Exercise In Young Adults: A Randomized, Double-Blinded, Crossover Study, Jeferson L. Jacinto, João Pedro Nunes, Alex S. Ribeiro, Juliano Casonato, Mirela C. Roveratti, Bruna N. S. Sena, Edilson S. Cyrino, Rubens A. Da Silva, Andreo F. Aguiar
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 486-497, 2021. This study aimed to investigate the effects of free leucine supplementation on muscle recovery from resistance exercise (RE) in young adults. Fourteen untrained subjects (23.9 ± 3.6 years old) underwent RE sessions (leg press and hack squat: three sets of 8-12 reps at 70% 1RM) supplemented with leucine (LEU: two daily doses of 3g) or a placebo (PLA), separated by a seven-day washout period. Following each occasion, participants were evaluated in three subsequent days (24h, 48h, and 72h) for muscle recovery via a repetition-to-failure test. The following markers were assessed: repetition performance, …
Transversus Abdominis And Lumbar Multifidus Thickness Among Three Dance Positions In Argentine Tango Dancers, Eleni Gouridou, Eleftherios Kellis, Ermioni Katartzi, Nikolaos Kofotolis
Transversus Abdominis And Lumbar Multifidus Thickness Among Three Dance Positions In Argentine Tango Dancers, Eleni Gouridou, Eleftherios Kellis, Ermioni Katartzi, Nikolaos Kofotolis
International Journal of Exercise Science
International Journal of Exercise Science 14(1): 473-485, 2021. Core muscle function is considered a risk factor for low back pain appearance in dancers. The purpose of this study was to examine the transversus abdominis and lumbar multifidus thickness among Argentine Tango dancers in different functional dance positions. A secondary purpose was to compare muscle thickness at rest and contraction between dancers and untrained participants. Ten trained dancers and ten untrained women aged 33.8 ± 6.09 years participated in this study. Using ultrasonography, the transversus abdominis and lumbar multifidus muscle thickness were measured at rest and during contraction in three different …
Comparison Of Countermovement And Squat Jumps Performance In Recreationally Trained Males, Paul Donahue, Samuel Wilson, Charles Williams, Christopher Hill, John Garner
Comparison Of Countermovement And Squat Jumps Performance In Recreationally Trained Males, Paul Donahue, Samuel Wilson, Charles Williams, Christopher Hill, John Garner
International Journal of Exercise Science
International Journal of Exercise Science 14(1): 462-472, 2021. The vertical jump has been shown to be an effective tool in assessing neuromuscular fatigue. The two most common iterations of the vertical jump are the countermovement and squat jumps. This investigation sought to identify if differences exist between the two jumping strategies with regard to electromyography (EMG) and kinetics in a group of recreationally trained males. Twenty-two participants completed one experimental session, where three countermovement (CMJ) and three squat jumps (SJ) were performed using a counterbalanced within-subject design. Jump performance was evaluated with data obtained using a force platform. Additionally, EMG …
Effect Of Neck Strength On Simulated Head Impacts During Falls In Female Ice Hockey Players, Brittany Pennock, Derek Kivi, Carlos Zerpa
Effect Of Neck Strength On Simulated Head Impacts During Falls In Female Ice Hockey Players, Brittany Pennock, Derek Kivi, Carlos Zerpa
International Journal of Exercise Science
International Journal of Exercise Science 14(1): 446-461, 2021. This study examined the effect of isometric cervical strength and impact location of the hockey helmet in mitigating the risk of concussions for two different mechanisms of injury from a fall during head impact simulation testing. Isometric cervical strength was measured on 25 female hockey players to compute and model neck strength on a mechanical neckform. A dual-rail vertical drop system with a helmet mounted on a surrogate headform simulated the mechanisms of injury causing concussions on female ice hockey players. Measures of peak linear acceleration and risk of injury due to …
An Assessment Of Mobile Applications Designed To Address Physical Activity During Pregnancy And Postpartum, Rachel A. Tinius, Mackenzie Polston, Hannah Bradshaw, Paula Ashley, Ashley Greene, Angel Parker
An Assessment Of Mobile Applications Designed To Address Physical Activity During Pregnancy And Postpartum, Rachel A. Tinius, Mackenzie Polston, Hannah Bradshaw, Paula Ashley, Ashley Greene, Angel Parker
International Journal of Exercise Science
International Journal of Exercise Science 14(7): 382-399, 2021. Only 15% of women meet physical activity guidelines during and after pregnancy despite the well-established positive impacts on both the mother and the neonate. There is a clear lack of guidance on this topic, and mobile health interventions are a promising direction for future interventions to facilitate a necessary increase in physical activity during pregnancy and postpartum. The purpose of the study was to objectively assess the quality and perceived impact of existing free mobile apps that are designed to cover physical activity during and after pregnancy. The Mobile Application Rating Scale …
Fluid Loss In Recreational Surfers, Jessica Atencio, Richard Armenta, Jeff A. Nessler, Matt Schubert, James Furness, Michael Climstein, Leon Mach, Sean Newcomer
Fluid Loss In Recreational Surfers, Jessica Atencio, Richard Armenta, Jeff A. Nessler, Matt Schubert, James Furness, Michael Climstein, Leon Mach, Sean Newcomer
International Journal of Exercise Science
International Journal of Exercise Science 14(6): 423-434, 2021. Surfing offers unique challenges to thermoregulation and hydration. The purpose of this study was to quantify fluid loss in recreational surfers, and to analyze the effects of water temperature, air temperature, exercise intensity, duration, and garment thickness on the total amount of fluid lost during a surf session. A total of 254 male and 52 female recreational surfers were recruited from San Diego, Costa Rica, and Australia to participate in the study. Participants’ hydration status was assessed by comparing nude body mass pre- and post-surf session. Heart rate (HR), used as an …
Does Resistance Training With Blood Flow Restriction Affect Blood Pressure And Cardiac Autonomic Modulation In Older Adults?, Karynne Grutter Lopes, Paulo Farinatti, Daniel Alexandre Bottino, Maria Das Graças Souza, Priscila Alves Maranhão, Eliete Bouskela, Roberto Alves Lourenço, Ricardo Brandão Oliveira
Does Resistance Training With Blood Flow Restriction Affect Blood Pressure And Cardiac Autonomic Modulation In Older Adults?, Karynne Grutter Lopes, Paulo Farinatti, Daniel Alexandre Bottino, Maria Das Graças Souza, Priscila Alves Maranhão, Eliete Bouskela, Roberto Alves Lourenço, Ricardo Brandão Oliveira
International Journal of Exercise Science
International Journal of Exercise Science 14(3): 410-422, 2021. Resistance training (RT) with blood flow restriction (BFR) appears to accelerate muscle hypertrophy and strength gains in older populations. However, the training-related effects of RT with BFR upon blood pressure (BP) and cardiac autonomic modulation in the elderly remains unclear. The objective of this study is to compare the chronic effects of low-intensity RT performed with soft BFR (BFR) vs. high-intensity (HI) and low-intensity RT (CON) without BFR on BP and heart rate variability (HRV) indices in older adults. Thirty-two physically inactive participants (72 ± 7 yrs) performed RT for upper and …
Postpartum Exercise Intervention Targeting Diastasis Recti Abdominis, Faith C. Laframboise, Rebecca A. Schlaff, Meghan Baruth
Postpartum Exercise Intervention Targeting Diastasis Recti Abdominis, Faith C. Laframboise, Rebecca A. Schlaff, Meghan Baruth
International Journal of Exercise Science
International Journal of Exercise Science 14(3): 400-409, 2021. To examine the effectiveness of an online, 12-week exercise intervention on diastasis recti abdominis (DRA) width and negatively associated health outcomes (i.e. weight and core function). Non-pregnant women who were 6-24 months postpartum and ≥ 18 years of age completed the study. Participants (n = 8) were randomized to intervention (exercise) or control groups; with the intervention group completing three exercise sessions per week virtually. Both groups completed three surveys at baseline, 6-weeks, and 12-weeks. DRA width was measured with nylon calipers at baseline and 12-weeks. Repeated measures analysis of covariance …
Effects Of Caffeine On Exercise Duration, Critical Velocity, And Ratings Of Perceived Exertion During Repeated-Sprint Exercise In Physically Active Men, Jesse A. Stein, Heath Gasier, Blake Goodman, Melitza Ramirez, Blanca Delatorre, Cassandra Beattie, Thomas J. Barstow, Katie Heinrich
Effects Of Caffeine On Exercise Duration, Critical Velocity, And Ratings Of Perceived Exertion During Repeated-Sprint Exercise In Physically Active Men, Jesse A. Stein, Heath Gasier, Blake Goodman, Melitza Ramirez, Blanca Delatorre, Cassandra Beattie, Thomas J. Barstow, Katie Heinrich
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 435-445, 2021. Caffeine improves short-to-moderate distance running performance, but the effect of caffeine on repeated sprints are equivocal. This research determined if caffeine improved exercise tolerance during repeated-sprint exercise. iCV is a running velocity that distinguishes intermittent running velocities (velocities ≤ iCV) that are sustainable from those resulting in a predictable time to exhaustion (velocities > iCV). Seven physically active men (age = 21.6 ± 1.5 years, body mass = 72.8 ± 5.1 kg, VO2max = 56.9 ± 9.8 mL/kg/min) ingested caffeine (5 mg/kg) or placebo (crossover design) 60 min prior to an intermittent …
The 6-Week Effects Of Hiit On Biomarkers Of Tissue And Oxidative Damage In Wistar Rats Previously Supplemented With Pyridoxine, Jéssica Danielle Matos, Felipe J. Aidar, Dihogo Gama De Matos, José Uilien De Oliveira, Ailton Santos Sena Júnior, Jymmys Lopes Dos Santos, Anderson Carlos Marçal, Silvan Silva De Araújo
The 6-Week Effects Of Hiit On Biomarkers Of Tissue And Oxidative Damage In Wistar Rats Previously Supplemented With Pyridoxine, Jéssica Danielle Matos, Felipe J. Aidar, Dihogo Gama De Matos, José Uilien De Oliveira, Ailton Santos Sena Júnior, Jymmys Lopes Dos Santos, Anderson Carlos Marçal, Silvan Silva De Araújo
International Journal of Exercise Science
International Journal of Exercise Science 14(7): 369-381, 2021. We aimed to analyze the effects of long high-intensity interval training (HIIT) associated with pyridoxin supplementation on tissue and oxidative injury markers in animals. Male Wistar rats were divided into three groups (n = 8): sedentary (GS), HIIT (GH), and HIIT + pyridoxine (GHP). The HIIT comprised 18 sessions of 7 repetitions of 2min × 2min rest, 3 times per week. Pyridoxine was administered to the GHP group 1h before the exercise. The Thiobarbituric acid reactive substances (TBARS) and sulfhydryl group (SH) were analyzed as markers of oxidative stress and CK, LDH, …
Ordinal Statistical Models Of Physical Activity Levels From Accelerometer Data, Shafayet S. Hossain, Drew M. Lazar, Munni Begum
Ordinal Statistical Models Of Physical Activity Levels From Accelerometer Data, Shafayet S. Hossain, Drew M. Lazar, Munni Begum
International Journal of Exercise Science
International Journal of Exercise Science 14(7): 338-357, 2021. Improvements in accelerometer technology has led to new types of data on which more powerful predictive models can be built to assess physical activity. This paper explains and implements ordinal random forest and partial proportional odds models which both take into account the ordinality of responses given explanatory accelerometer data. The data analyzed comes from 28 adults performing activities of daily living in two visits while wearing accelerometers on the ankle, hip, right and left wrist. The first visit provided training data and the second testing data so that an independent sample, …
Skilled Throwing Performance: A Test Of The Optimal Theory, Jacquelyn V.L. Sertic, Jason M. Avedesian, James W. Navalta
Skilled Throwing Performance: A Test Of The Optimal Theory, Jacquelyn V.L. Sertic, Jason M. Avedesian, James W. Navalta
International Journal of Exercise Science
International Journal of Exercise Science 14(5): 358-368, 2021. The OPTIMAL theory of motor learning postulates that autonomy support (AS), enhanced expectancies (EE), and an external focus of attention (EF) facilitate improved motor learning and performance. However, its applicability to elite-level throwing athletes has not been investigated by previous literature. The primary purpose of this study was to investigate the successive implementation of AS, EE, and EF factors on overhand throwing performance in elite collegiate softball athletes (14.44 ± 2.75 years of softball experience). The secondary purpose was to determine whether self-efficacy beliefs would be augmented by factor manipulation. Twenty-four participants …
Physical And Lifestyle Factors Influencing Bone Density In Jockeys: A Comprehensive Update Of The Bone Density Status Of Irish Jockeys, Arthur Dunne, Giles Warrington, Adrian Mcgoldrick, Jennifer Pugh, Michael Harrison, Siobhan O'Connor, Gillian O'Loughlin, Sarahjane Cullen
Physical And Lifestyle Factors Influencing Bone Density In Jockeys: A Comprehensive Update Of The Bone Density Status Of Irish Jockeys, Arthur Dunne, Giles Warrington, Adrian Mcgoldrick, Jennifer Pugh, Michael Harrison, Siobhan O'Connor, Gillian O'Loughlin, Sarahjane Cullen
International Journal of Exercise Science
International Journal of Exercise Science 14(6): 324-337, 2021. Compromised bone density in jockeys has previously been identified as an important health and safety concern in horseracing. Despite this, no update on the bone density status in Irish jockeys has been provided in the past decade. The study aimed to conduct a comprehensive update of the current bone density status in professional Irish jockeys and identify possible contributory physical and lifestyle factors. Eighty-five professional male jockeys (flat n = 39; national hunt (NH) n = 46) completed a dual-energy X-ray absorptiometry (DXA) scan for the assessment of body composition and bone …
Effects Of A Vibrating Foam Roller On Ipsilateral And Contralateral Neuromuscular Function And The Hamstring-To-Quadriceps Ratios, Rachel M. Ruggieri, Jared W. Coburn, Andrew J. Galpin, Pablo B. Costa
Effects Of A Vibrating Foam Roller On Ipsilateral And Contralateral Neuromuscular Function And The Hamstring-To-Quadriceps Ratios, Rachel M. Ruggieri, Jared W. Coburn, Andrew J. Galpin, Pablo B. Costa
International Journal of Exercise Science
International Journal of Exercise Science 14(1): 304-323, 2021. The effects of vibrating foam rolling the hamstrings on range of motion (ROM), hamstrings-to-quadriceps (H:Q) ratios, muscle activation, and peak torque (PT) of the quadriceps and hamstrings have yet to be extensively studied. The aim of this study was to investigate the effects of a vibrating foam roller on the hamstrings. Fifteen resistance trained women (mean age ± SD = 22.9 ± 2.0 years, height = 162.7 ± 4.8 cm, body mass = 66.0 ± 9.7 kgs, BMI = 24.9 ± 3.3 kg·m2) participated in five separate testing sessions to …
Estimating The Lactate Threshold Using Wireless Near-Infrared Spectroscopy And Threshold Detection Analyses, Trent E. Cayot, Shara G. Robinson, Lindsay E. Davis, Paul A. Bender, John R. Thistlethwaite, Craig E. Broeder, Jakob D. Lauver
Estimating The Lactate Threshold Using Wireless Near-Infrared Spectroscopy And Threshold Detection Analyses, Trent E. Cayot, Shara G. Robinson, Lindsay E. Davis, Paul A. Bender, John R. Thistlethwaite, Craig E. Broeder, Jakob D. Lauver
International Journal of Exercise Science
International Journal of Exercise Science 14(4): 284-294, 2021. The present investigation examined the ability of two threshold detection analyses (maximum distance, Dmax; modified maximum distance, mDmax) in identifying the near-infrared spectroscopy (NIRS) threshold, a lactate threshold (LT) estimate, from exercising tissue oxygen saturation (StO2) responses. Additionally, the test-retest reliability of exercising StO2 and total hemoglobin concentration (THC) responses were examined at moderate and peak cycling intensities. Fourteen healthy, recreationally active participants performed maximal incremental step cycling tests (+25 W / 3 minutes) to volitional fatigue on two separate occasions while StO2 and THC of the vastus …
Different Cooling Strategies Applied During Inter-Set Rest Intervals In High-Intensity Resistance Training, Gilmar J. Esteves, Renato A. Garcia, Paulo H. S. M. Azevedo
Different Cooling Strategies Applied During Inter-Set Rest Intervals In High-Intensity Resistance Training, Gilmar J. Esteves, Renato A. Garcia, Paulo H. S. M. Azevedo
International Journal of Exercise Science
International Journal of Exercise Science 14(2): 295-303, 2021. The purpose of this study was to verify whether cooling between sets during high-intensity resistance exercise improves physical performance and to compare performance among different sites of cooling. It is important because delaying the muscular fatigue could improve total volume at a training session which could lead to greater hypertrophy. Nine healthy and recreational resistance training experienced men, performed six tests of a biceps curl exercise on different days. The first test was the one-repetition maximum test (1RM). Following, we applied five sessions, in crossover and randomized (counter-balanced) design. The subjects received …
Acute Effects Of Foam Rolling On Cycling Performance: A Randomized Cross-Over Study, Julio Benvenutti Bueno De Camargo, Paulo Henrique Barbosa, Matheus Moraes, Tiago Volpi Braz, Felipe Alves Brigatto, Danillo Rodrigues Batista, Guilherme Businari, Charlini Hartz, Ricardo Simoes, Marcelo Saldanha Aoki, Charles Ricardo Lopes
Acute Effects Of Foam Rolling On Cycling Performance: A Randomized Cross-Over Study, Julio Benvenutti Bueno De Camargo, Paulo Henrique Barbosa, Matheus Moraes, Tiago Volpi Braz, Felipe Alves Brigatto, Danillo Rodrigues Batista, Guilherme Businari, Charlini Hartz, Ricardo Simoes, Marcelo Saldanha Aoki, Charles Ricardo Lopes
International Journal of Exercise Science
International Journal of Exercise Science 14(6): 274-283, 2021. Acute foam rolling protocols may increase range of motion without a negative impact on muscle performance. The main purpose of the present study was to investigate the acute effects of foam rolling on cycling performance (mean power and maximal power), affect and perceived exertion. A secondary aim was to assess the effect of foam rolling on post-exercise muscle soreness. In a random order, ten recreationally trained cyclists (age: 26 ± 5 years; height 1.76 ± 0.06 m; total body mass 78.3 ± 19.8 kg; cycling experience: 5.6 ± 5.3 years; 4.1 ± …