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Full-Text Articles in Physiology

The Effects Of Lower Leg Compression Garments On Lower Extremity Sports Injuries, Subjective Fatigue And Biomechanical Variables: A Systematic Review With Meta-Analysis, Thierry P.C. Franke, Hetty Hofstede, Anke Van Den Broek, Bionka M.A. Huisstede Dr. Apr 2024

The Effects Of Lower Leg Compression Garments On Lower Extremity Sports Injuries, Subjective Fatigue And Biomechanical Variables: A Systematic Review With Meta-Analysis, Thierry P.C. Franke, Hetty Hofstede, Anke Van Den Broek, Bionka M.A. Huisstede Dr.

International Journal of Exercise Science

International Journal of Exercise Science 17(6): 445-467, 2024. The objective of this study was to systematically review the literature on the effect of CGs versus non-CGs (such as regular socks) or versus placebo garments on 1) the incidence of lower extremity sports injuries and 2) subjective ratings of fatigue and biomechanical variables in athletes at participating in any sport that required any level of running performance, given that fatigue-related biomechanical alterations may increase the risk of sports injuries. This study was a systematic review with meta-analyses. PubMed, Embase, CINAHL, Cochrane, PEDro, and Scopus were searched for eligible studies until 7 …


Stance Time And Impact Loading Rates Are Significant Predictors Of Critical Speed During A 3-Minute All-Out Running Test, Trevor Short, Cris Stickley, Bret Freemyer, Andrew Takata, Paulette Yamada Jan 2024

Stance Time And Impact Loading Rates Are Significant Predictors Of Critical Speed During A 3-Minute All-Out Running Test, Trevor Short, Cris Stickley, Bret Freemyer, Andrew Takata, Paulette Yamada

International Journal of Exercise Science

International Journal of Exercise Science 17(4): 115-128, 2024. The addition of wearable technology during a 3-minute all-out overground running test (3MAOT) could provide additional insights to guide training and coaching strategies. The purpose of this study was to explore the relationships between critical speed (CS) and biomechanical parameters (cadence, stride length, vertical oscillation, stance time, form power, leg spring stiffness, and impact loading rate), and changes in biomechanical parameters throughout the 3MAOT. Sixty-three (male, n=37, female, n=26) recreationally active college-aged (23.4±3.9 years) subjects completed a 3MAOT while wearing a Stryd foot-pod. The correlations between CS and biomechanical parameters were evaluated …


Effect Of Substitution Time On Physical, Technical And Cognitive Performance In Sub-Elite Male Field Hockey Players, Thomas W. Spooner, Andrew T. West, Mark Et Willems Apr 2023

Effect Of Substitution Time On Physical, Technical And Cognitive Performance In Sub-Elite Male Field Hockey Players, Thomas W. Spooner, Andrew T. West, Mark Et Willems

International Journal of Exercise Science

International Journal of Exercise Science 16(6): 497-512, 2023. We examined the effects of substitution time (i.e., recovery time) in a simulated field hockey test on physical, technical and perceptual/cognitive performance. Nine sub-elite male field hockey players (age: 20 ± 2 yrs, height: 1.81 ± 0.06 m, body mass: 71 ± 10 kg, body fat: 10.3 ± 3.7%, O2max: 67 ± 3 completed four 8-min 40-s bouts of high-intensity intermittent exercise with 2-min and 5.5-min substitution time replicating the demands of a 4-quarter field hockey match. After each bout, a 15-m maximal sprint, agility/dribbling test, passing accuracy test, and …


Neuromuscular Responses To Failure Vs Non-Failure During Blood Flow Restriction Training In Untrained Females, Christopher E. Proppe, Taylor M. Aldeghi, Paola Rivera, David H. Gonzalez-Rojas, Ethan C. Hill Phd Feb 2023

Neuromuscular Responses To Failure Vs Non-Failure During Blood Flow Restriction Training In Untrained Females, Christopher E. Proppe, Taylor M. Aldeghi, Paola Rivera, David H. Gonzalez-Rojas, Ethan C. Hill Phd

International Journal of Exercise Science

International Journal of Exercise Science 16(1): 293-303, 2023. Applying blood flow restriction (BFR) during resistance exercise is a potent stimulus of muscular adaption, but there is little direct comparison of its effect on neuromuscular function. The purpose of this investigation was to compare surface electromyography amplitude and frequency responses during a 75 (1 × 30, 3 × 15) repetition bout (BFR-75) of BFR to 4 sets to failure (BFR-F). Twelve women (mean ± SD age = 22 ± 4 years; body mass = 72 ± 14.4 kg; height = 162.1 ± 4.0 cm) volunteered for the investigation. One leg was …


Factors Influencing Motivation To Perform Mental And Physical Tasks During The Initial Lockdown Period Of The Covid-19 Pandemic, Niklas Mckone, Joel R. Martin, Italia Milani, Shantanu Sur, Sumona Mondal, Nelson Cortes, Shane V. Caswell, Ali Boolani Dec 2022

Factors Influencing Motivation To Perform Mental And Physical Tasks During The Initial Lockdown Period Of The Covid-19 Pandemic, Niklas Mckone, Joel R. Martin, Italia Milani, Shantanu Sur, Sumona Mondal, Nelson Cortes, Shane V. Caswell, Ali Boolani

International Journal of Exercise Science

International Journal of Exercise Science 15(5): 1600-1615, 2022. Drastic changes to lifestyles have occurred during the COVID-19 pandemic. An unintended consequence of stay at home orders is increased isolation and less social interaction for many people. For overall wellbeing it is important to stay both physically and mentally active; however, for many individual’s motivation may be a barrier. There are non-modifiable (e.g. sex, age, personality, infection rates in the area) and modifiable factors (e.g. physical activity, diet, sleep) that may be associated with motivation to perform physical and mental tasks. We collected data from 794 subjects using an online survey …


Unilateral Handgrip Holds To Failure Result In Sex-Dependent Contralateral Facilitation, Caleb C. Voskuil, Taylor K. Dinyer-Mcneely, Pasquale J. Succi, Marilyn S. Campbell, Mark G. Abel, Haley C. Bergstrom Jun 2022

Unilateral Handgrip Holds To Failure Result In Sex-Dependent Contralateral Facilitation, Caleb C. Voskuil, Taylor K. Dinyer-Mcneely, Pasquale J. Succi, Marilyn S. Campbell, Mark G. Abel, Haley C. Bergstrom

International Journal of Exercise Science

International Journal of Exercise Science 15(4): 782-796, 2022. This study examined changes in maximal voluntary isometric contraction (MVIC) force following dominant (Dm) and nondominant (NDm) unilateral, handgrip isometric holds to failure (HTF) for the exercised ipsilateral (IPS) and non-exercised contralateral (CON) limbs and determined if there are sex- and hand- (Dm vs NDm) dependent responses in the HTF time, performance fatigability (PF) for the exercised IPS limb, and changes in MVIC force for the CON limb after unilateral fatigue. Ten men and 10 women (Age = 22.2 years) completed an isometric HTF at 50% MVIC for the Dm and NDm …


The Effect Of Set Configuration And Load On Post-Activation Potentiation On Vertical Jump In Athletes, Paolo Sirieiro, Igor Nasser, Ward C. Dobbs, Jeff Willardson, Humberto Miranda Jun 2021

The Effect Of Set Configuration And Load On Post-Activation Potentiation On Vertical Jump In Athletes, Paolo Sirieiro, Igor Nasser, Ward C. Dobbs, Jeff Willardson, Humberto Miranda

International Journal of Exercise Science

International Journal of Exercise Science 14(4): 902-911, 2021. The aim of this study was to compare the effect of post-activation potentiation (PAP) on countermovement jump (CMJ) using different set configurations and loads on conditioning activity (CA) in highly trained athletes. Sixteen national level swimmers participated in this study and performed a total of six visits to the laboratory. The first session was used for familiarization, the second session was utilized to determine five repetitions maximum (RM) in the half squat (HS), and the following four visits consisted of four CA protocols performed in a counterbalanced order. Two CAs were performed …


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 Feb 2021

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 …


Effects Of Power-Endurance And Controlled Heavy Squat Protocols On Vertical Jump Performance In Females, Cameron S. Mackey, Ryan M. Thiele, Jessica Schnaiter-Brasche, Doug B. Smith, Eric C. Conchola Jul 2020

Effects Of Power-Endurance And Controlled Heavy Squat Protocols On Vertical Jump Performance In Females, Cameron S. Mackey, Ryan M. Thiele, Jessica Schnaiter-Brasche, Doug B. Smith, Eric C. Conchola

International Journal of Exercise Science

International Journal of Exercise Science 13(4): 1072-1085, 2020. The purpose of this investigation was to examine the immediate and acute vertical jump performance responses throughout and following two different free-weight back squat exercise protocols. Fifteen resistance-trained women (mean ± SD: age = 21.8 ± 0.9 years; height = 164.6 ± 8.4 cm; mass = 68.5 ± 9.2 kg) performed vertical jumps before (Pre), immediately after each set (S1-S5), and up to 20 minutes post squat exercise (Post0-Post20) of either a power-endurance (PE; 5×16 at 40% 1-RM) or controlled heavy (CHP; 5×8 at 80%) protocol. Participants’ jump height (JH), mean (MP), …


Comparison Of High-Volume And High-Intensity Upper Body Resistance Training On Acute Neuromuscular Performance And Ratings Of Perceived Exertion, Bruno Victor Correia Da Silva, Daniella Bertulucci Terra Branco, Bernardo Neme Ide, Moacir Marocolo, Hiago Leandro R De Souza, Rhaí André Arriel E Oliveira, Dustin Jay Oranchuk, Gustavo R. Mota Apr 2020

Comparison Of High-Volume And High-Intensity Upper Body Resistance Training On Acute Neuromuscular Performance And Ratings Of Perceived Exertion, Bruno Victor Correia Da Silva, Daniella Bertulucci Terra Branco, Bernardo Neme Ide, Moacir Marocolo, Hiago Leandro R De Souza, Rhaí André Arriel E Oliveira, Dustin Jay Oranchuk, Gustavo R. Mota

International Journal of Exercise Science

International Journal of Exercise Science 13(1): 723-733, 2020. The assessment of neuromuscular fatigue is important for minimizing the risks of nonfunctional overreaching, and monitoring training loads has rapidly grown in recent years. The objective of the study was to compare the acute upper body performance and rating of perceived exertion (RPE) responses to high-volume (HV) and high-intensity (HI) resistance-training loads. Sixteen young resistance-trained men (4 repetition maximum [RM] bench press = 105.8 ± 15.9 kg) were divided into two groups of eight subjects each that performed a HI (3 sets of 4RM with 180 s of rest), and a HV …


Effects Of A 60 Minute On Ice Game Simulation On The Balance Error Scoring System, Philip Cameron, Noelle C. Soltero, Justin Byers Feb 2018

Effects Of A 60 Minute On Ice Game Simulation On The Balance Error Scoring System, Philip Cameron, Noelle C. Soltero, Justin Byers

International Journal of Exercise Science

International Journal of Exercise Science 11(6): 462-467, 2018. Mild traumatic brain injuries (mTBIs) are common in contact sports. There is an association between mTBIs and altered motor function. BioSway technology measures individuals’ balance using the Balance Error Scoring System (BESS). Prior to incorporating BESS testing in concussion protocol, other variables that influence the BESS test require review. The objective of this study is to determine if game fatigue in hockey players also influences the BESS score. 23 male (21.08 ± 1.09) National Collegiate Athletic Association (NCAA) athletes were tested using the BioSway™ (Biodex, USA). The BESS test measures the Sway …


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 Apr 2017

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. …


The Effects Of Adaptogens On The Physical And Psychological Symptoms Of Chronic Stress, Tosin O. Ajala Jan 2017

The Effects Of Adaptogens On The Physical And Psychological Symptoms Of Chronic Stress, Tosin O. Ajala

DISCOVERY: Georgia State Honors College Undergraduate Research Journal

Stress is a state of disharmony or threatened homeostasis. The maintenance of homeostasis in stages of internal or external challenges, called stressors, requires constant adjustments of hormonal, behavioral, and autonomic functions. The nuances of life may bring about unwanted stress to the human body. Some of the top causes of stress in America include work, finances, relationships, and health. There are numerous physical and psychological symptoms associated with long-term “chronic” stress, which include chronic fatigue, frustration, irritability, insomnia, frequent headaches, chest and back pain, weakness, and weight gain or weight loss. These symptoms of chronic stress are associated with depression, …


Implementing A 4 Week Balance Protocol To Impact Quality Of Life In Cancer Patients, Alyssa Bender, Lauren Braun, Kayla Franklin, Megan Kidd, Nicole Rendler Apr 2015

Implementing A 4 Week Balance Protocol To Impact Quality Of Life In Cancer Patients, Alyssa Bender, Lauren Braun, Kayla Franklin, Megan Kidd, Nicole Rendler

International Journal of Exercise Science

International Journal of Exercise Science 8(2): 145-153, 2015. As a result of various cancer treatments, balance, fall risk, and quality of life (QOL) of cancer survivors are often negatively compromised. There has been no prior research conducted examining balance ability and its association with QOL in cancer patients. The purpose of this study was to investigate whether improved balance will positively influence QOL. Eight female cancer patients (age 55.8 ± 11.8 yrs.) volunteered for an experimental group, and five sex-matched cancer patients (age 64.5 ± 4.6 yrs.) volunteered for a control group. A 4-week balance program, employed twice per week …


Elevated Psa Is Associated With Decreased Physical Function In Men With Prostate Cancer, Clayton S. Robinson, Darpan I. Patel Feb 2015

Elevated Psa Is Associated With Decreased Physical Function In Men With Prostate Cancer, Clayton S. Robinson, Darpan I. Patel

International Journal of Exercise Science: Conference Proceedings

Studies have reported an association between cortisol and fatigue in multiple clinical populations, including prostate cancer (PCa). Treatment options for men with PCa, such as androgen deprivation therapy (ADT), come with a wide variety of adverse effects, including cancer-related fatigue, which greatly impacts quality of life (QoL). PURPOSE: Conduct a preliminary analysis on the association between cortisol, fatigue and QoL in men with PCa. METHODS: This study is part of an ongoing study to determine the impact of PCa and PCa treatment on fatigue and QoL approved by the University of Texas Health Science Center at San Antonio …


The Critical Power Concept And Bench Press: Modeling 1rm And Repetitions To Failure, R Hugh Morton, Matthew D. Redstone, Daniel J. Laing Apr 2014

The Critical Power Concept And Bench Press: Modeling 1rm And Repetitions To Failure, R Hugh Morton, Matthew D. Redstone, Daniel J. Laing

International Journal of Exercise Science

International Journal of Exercise Science 7(2) : 152-160, 2014. Introduction: We demonstrate application of the 3-parameter critical power (CP) model derived for cycling and running, to performance at bench press exercise. We apply the model to both performance of a single repetition maximum (1RM) and multiple repetitions (reps) to failure at different sub-maximal weights. Methods: Sixteen weight-trained young adult male participants each performed a modified YMCA 1RM test and four sets of fixed cadence reps to failure at different sub-maximal weights. The CP model equation takes the form: n = ALC/(m – CL) + ALC/(CL – Lmax,), where n is …


A Description Of Variability Of Pacing In Marathon Distance Running, Tom Haney Jr., John Mercer Dr. Apr 2011

A Description Of Variability Of Pacing In Marathon Distance Running, Tom Haney Jr., John Mercer Dr.

International Journal of Exercise Science

The purpose of this study was twofold: 1) to describe variability of pacing during a marathon and 2) to determine if there is a relationship between variability of pacing and marathon performance. Publically available personal global positioning system profiles from two marathons (Race 1 n = 116, Race 2 n = 169) were downloaded (http://connect.garmin.com) for analysis. The coefficient of variation of velocity (Velcov) was calculated for each profile. Each profile was categorized as finishing in under 3.9 hours, between 3.9 and 4.6 hours, or longer than 4.6 hours. Linear and quadratic lines of best fit were computed to describe …


Acute Exercise In Vietnam Veterans Is Associated With Positive Subjective Experiences, Rebecca M. Sealey† Jan 2010

Acute Exercise In Vietnam Veterans Is Associated With Positive Subjective Experiences, Rebecca M. Sealey†

International Journal of Exercise Science

Int J Exerc Sci 3(1): 36-42, 2010. A person’s subjective experience to their first exercise session is likely to influence their long-term adherence to regular exercise. The aim of the current pilot study therefore is to quantify the subjective exercise experience of previously sedentary Vietnam War Veterans undertaking an initial bout of one of three different exercise interventions. Thirty-two Vietnam Veterans presenting with one or more chronic diseases/conditions participated in one of three acute exercise bouts: 1) lower-body vibration, upper-body resistance and stretching (WBVT); 2) lower-body vibration, upper-body resistance, aerobic exercise and stretching (WBVT+CV); and 3) full-body resistance, aerobic exercise …


Changes In Emg And Finger Force With Repeated Hangs From The Hands In Rock Climbers, Phillip B. Watts‡, Randall L. Jensen‡, Sara M. Agena†, John A. Majchrzak†, Rebecca A. Schellinger†, Cory S. Wubbels† Apr 2008

Changes In Emg And Finger Force With Repeated Hangs From The Hands In Rock Climbers, Phillip B. Watts‡, Randall L. Jensen‡, Sara M. Agena†, John A. Majchrzak†, Rebecca A. Schellinger†, Cory S. Wubbels†

International Journal of Exercise Science

The nature and degree of fatigue in muscles that control finger position during repeated sustained efforts in rock climbing have not been described. The purpose of this study was to identify changes in maximum hang time and forearm electromyogram (EMG) during repeated maximum duration hangs from a simulated rock feature. A second objective was to determine the effect of different recovery times between hangs upon changes in finger force. Five experienced rock climbers performed 2 test sessions on different days in a randomized order. Each session involved 8 repetitions of a maximum duration hang with either 1 min (R1) or …


Fatique In Caged Layers, P Smetana Jan 1965

Fatique In Caged Layers, P Smetana

Journal of the Department of Agriculture, Western Australia, Series 4

Pullets found immobilised on the floors of their laying cages may only be suffering from the easily-treated "cage layer fatigue" and should be checked for this before being disposed of as affected with the incurable fowl paralysis.