Sports Sciences Commons^™

Acute Effects Of Match Play Induced Fatigue On Jump Performance In Collegiate Women's Volleyball, Grayson Flora

Electronic Theses and Dissertations

This study investigated changes in maximal jump performance in response to match play induced fatigue. During six sets of tournament match play, seven National Association of Intercollegiate Athletics women’s volleyball athletes accumulated a mean Player Load of 758.6±216.89 au (measured via microsensor accelerometry), and mean session rate of perceived exertion of 1184.1±363.2. Repeated measures ANOVAs were used to identify change with Hedge’s g effect sizes used to assess magnitude of change. Short recovery stress scale results indicated elevated stress (ES=1.401 to 1.588) and decreased recovery (ES = -1.358 to -1.848) 24 hours post-match, trending towards baseline 48 hours post-match. Countermovement …

Effects Of Acute Exercise Intensity On Memory: Considerations Of Timing And Aerobic Endurance, William Meyers, Caroline Loeb, Mary Collins West, Bailey Bass

Honors Theses

The primary objective of this study was to find the optimal acute exercise intensity and post-exercise recovery time to enhance memory retention. A secondary objective of study was to evaluate the influence of aerobic endurance on memory and whether endurance capacity interacts with exercise intensity and post-exercise recovery period to influence memory performance. Participants were 54 undergraduate and graduate students at the University of Mississippi, with an age range of 18-23 years. Participants completed 13 visits in total. The first visit evaluated their aerobic endurance, with the remaining 12 visits including a 3 (Intensity: Control, Moderate, Vigorous) by 4 (Post-Exercise …

An Interaction Between Exercise Order And Rest Interval During Lower-Body Resistance Exercise, Hamid Arazi, Bahman Mirzaei, Morteza Sangdevini, Mohammad Reza Hossein Abadi

Baltic Journal of Health and Physical Activity

Background: The purpose of the present study was to compare the influence of two- and five-minute rest intervals on the number of repetitions per set and total repetitions per exercise for a lower-body workout performed in 2 different sequences. Material/Methods: 12 resistance trained men completed 4 experimental resistance exercise sessions. All sessions consisted of 3 sets with a 10-repetition maximum load for 4 lower-body exercises. Two different exercise sequences (i.e., A or B) were performed with either 2- or 5- minute rest between the sets and the exercises, respectively. The order of exercises for sequence A2 (SEQA2) and sequence A5 …

Digital Burnout And Perceptive Failure: The Example Of Physical Education Teachers During The Covid-19 Pandemic, Tayfun Şi̇ri̇n, Yeliz Eratli Şi̇ri̇n, Berna Can, Oğuzkaan Uruç

Baltic Journal of Health and Physical Activity

This research was conducted to examine physical education teachers’ levels of digital burnout and perceptual fatigue during the COVID-19 pandemic. Material and methods: This study was designed according to the quantitative research model and conducted within the framework of the relational screening model. The research group consists of 504 physical education teachers, including 240 women and 264 men, who work in high schools and secondary schools in Adana and Mersin provinces. Results: The results showed that the teachers working in high schools were in the digital environment too much. At the same time, teachers stated that they did not feel …

Changes Related To Fatigue In Cardiorespiratory Response Sensitivity To Hypoxic And Hypercapnic Stimulation During Strenuous Physical Load, Viktor Mishchenko, Andrzej Suchanowski, Olena Lysenko

Baltic Journal of Health and Physical Activity

Background: The aim was to study changes in the sensitivity of CRS responses of skilled athletes caused by fatigue during a strenuous physical load. Material/Methods: Response sensitivity to hypoxic and hypercapnic stimuli was analyzed in a group of high performance rowers (n=12) aged 18-22 years during exercising on “Concept-II” rowing ergometer. Two types of loads were used: sustained intensive load at high oxygen consumption (78-83% of VO2max) and relatively easier load (49-62% of VO2max) performed within 5 minutes. The method of rebreathing was used to determine responses sensitivity to СО2. Results: The results showed an increase in respiratory response sensitivity …

Monitoring Firing Behaviors Of Motor Unit Action Potentials During Low-Intensity Fatiguing Contractions, Dakota Harris, Lyric Richardson, Amy Riera, Emma Bozarth, Micheal Luera

International Journal of Exercise Science: Conference Proceedings

Motor Units (MU) are systematically activated from increasing size in accordance to the size principle. As muscle fatigue sets in, MU firing rate increases in response to sustaining whole-body force production during a low-loaded sustained contraction with respect to MU size and MU interspike intervals (ISI). PURPOSE: The purpose of this study is to compare the motor unit firing behaviors during low-force isometric fatiguing contractions. Methods: Following 3 MVCs, eight lower-body resistance trained males (23.38 ± 2.88 yrs.; 178.38 ± 7.85 cm; 86.10 ± 11.88 kg) performed 60 second submaximal (30% MVC) isometric ramp contraction of the knee extension …

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: Conference Proceedings

There can be differences in fatigue characteristics between men and women. In some cases, these differences may be manifested in unique strength responses in the fatigued and non-fatigued limbs following a unilateral fatiguing task. PURPOSE: This study examined changes in maximal voluntary isometric contraction (MVIC) force following dominant (Dm) and nondominant (NDm) unilateral, isometric handgrip holds to failure (HTF) for the exercised ipsilateral (IPS) and non-exercised contralateral (CT) limbs. Sex- and hand- (Dm vs NDm) dependent responses in HTF time, performance fatiguability (PF, %D in MVIC) for the exercised IPS limb, as well as changes in MVIC force for the …

Cortical Activity Measured With Low-Intensity Fatiguing Contractions Of The Quadriceps Muscle Group, Emma D. Bozarth, Lyric D. Richardson, Amy E. Riera, Micheal J. Luera, Amber H. Bozer

International Journal of Exercise Science: Conference Proceedings

Modulation of force production required during exercise is regulated from various mechanisms in the central and peripheral nervous system. Fatigue is influenced by various mechanics that may hinder the ability to continuously sustain force production. The neural activation patterns of these systems can be recorded as electrical impulses using several non-invasive techniques. The ability to examine these during fatiguing exercise has provided further insight into activation patterns in the central nervous system (i.e., motor and pre-motor cortex) during sustained muscle contractions. Electroencephalography (EEG) has been recently utilized to examine changes associated with central fatigue, but limited advancements in technology for …

Effects Of Low-Intensity Fatigue On Motor Unit Firing Properties During Maximal Voluntary Isometric Contractions, Lyric Richardson, Amy Riera, Emma Bozarth, Micheal Luera

International Journal of Exercise Science: Conference Proceedings

Rehabilitation from injuries impairing the neuromuscular system is often difficult to quantify due to task specificity of the affected or immobilized limb or limbs. Often, exercise regimens with clinical practitioners are designed to progress motor performance to a capacity that reflects muscle force production to pre-injury capacity. Modulation of force production from these tasks are regulated from various mechanism in the central and peripheral nervous system. The neural activation of these systems can be recorded as electrical impulses using several non-invasive techniques. Recently, the ability to examine these during fatiguing exercise has provided further insight into activation patterns and firing …

Voluntary Activation Of Muscle In Humans: Does Serotonergic Neuromodulation Matter?, Justin J. Kavanagh, Janet L. Taylor

Research outputs 2022 to 2026

Ionotropic inputs to motoneurones have the capacity to depolarise and hyperpolarise the motoneurone, whereas neuromodulatory inputs control the state of excitability of the motoneurone. Intracellular recordings of motoneurones from in vitro and in situ animal preparations have provided extraordinary insight into the mechanisms that underpin how neuromodulators regulate neuronal excitability. However, far fewer studies have attempted to translate the findings from cellular and molecular studies into a human model. In this review, we focus on the role that serotonin (5-HT) plays in muscle activation in humans. 5-HT is a potent regulator of neuronal firing rates, which can influence the force …

Perceptual Fatigability And Neuromuscular Responses During A Sustained, Isometric Forearm Flexion Muscle Action Anchored To A Constant Level Of Perceived Exertion, Robert W. Smith, John Paul V. Anders, Tyler J. Neltner, Jocelyn E. Arnett, Joshua L. Keller, Terry J. Housh, Richard J. Schmidt, Glen O. Johnson

Journal for Sports Neuroscience

Objective: The purpose of the present study was to examine the fatigue-induced changes in torque, and the electromyographic (EMG) and mechanomyographic (MMG) responses during a sustained submaximal, isometric forearm flexion muscle action anchored to a constant rating of perceived exertion (RPE). Methods: Eleven women (mean ± SD: age = 20.5 ± 1.9 yrs.; height = 169.9 ± 6.6 cm; body mass = 73.2 ± 15.9 kg) performed 2, 3s forearm flexion maximal voluntary isometric contractions (MVIC) before a sustained isometric muscle action anchored to RPE = 7 until task failure (defined as torque that would require RPE > 7, or the …

Obstacle Negotiation Gaze Strategies Of The Physically Fatigued, Belle P. Ponce De Leon, Makena Savola, Sedona Boren, Andrew Fishman, Sarika Varma, Jacob W. Hinkel-Lipsker

International Journal of Exercise Science: Conference Proceedings

INTRODUCTION: Proper obstacle negotiation while in a fatigued state is a safety concern for first responders, firefighters and other primary relief personnel in their high-risk line of work. During locomotion the central gaze is focused beyond the obstacle to plan future steps while the peripheral vision spatially tracks the obstacle. Previous work indicates that following intense exercise people experience a narrowed peripheral visual field, making them more reliant on central gaze. Thus, it is possible that when physically-fatigued people become more reliant on central gaze to perceive obstacles, leaving them unable to plan future steps as effectively.

PURPOSE: This study …

Crossing Over To The Other Side; Studying Effect Of Fatigue When Walking In A Randomized & New Space, Joshua A. Vicente, Alex X. Krause, Yesenia Acosta-Marin, Ephraim Flores, Jaesung Joo, Jacob W. Hinkel-Lipsker

International Journal of Exercise Science: Conference Proceedings

Slips, trips, and falls (STFs) that lead to a substantial amount of workplace injuries. In any career that requires physical effort, it is crucial to maintain a strong reaction and response time to these unpredictable environments to maintain worker safety. In dynamic, ever-changing workplaces, it is important to know how to best mitigate trip and fall risk. However, there is little literature describing how physical fatigue affects young, healthy individuals’ ability to negotiate obstacles, as well as whether there are worker characteristics that may put them at greater risk of STFs.

PURPOSE: Therefore, our purpose is to identify the …

Win, Draw, Or Lose? Global Positioning System-Based Variables’ Effect On The Match Outcome: A Full-Season Study On An Iranian Professional Soccer Team, Hadi Nobari, Norbert Keshish Banoocy, Rafael Oliveira, Jorge Pérez-Gómez

Research outputs 2014 to 2021

The aim of the study was to determine the between-match and between-halves match variability of various Global Positioning System (GPS) variables and metabolic power average (MPA) in competitions, based on the match results obtained by professional soccer players over a full season. Observations on individual match performance measures were undertaken on thirteen outfield players competing in the Iranian Premier League. The measures selected for analysis included total duration, accelerations in zones (AccZ1, 2, and 3), decelerations in zones (DecZ1, 2, and 3), and MPA collected by the Wearable Inertial Measurement Unit (WIMU). The GPS manufacturer set the thresholds for the …

Paraspinal Muscle Fatigue Influences Trunk Kinematics During Single-Leg Drop Jump Landings, Natalie A. Delgadillo, Michael W. Olson

International Journal of Exercise Science: Conference Proceedings

Neuromuscular fatigue of the paraspinal muscles modifies kinematics responses to perturbations in controlled settings. PURPOSE: The purpose of this study was to assess trunk kinematics response during single-leg drop landings before and after induced neuromuscular fatigue of the low back muscles. METHODS: 13 male and female volunteers (22.3 ± 2.6 years, 1.66 ± 0.09m, 68.0 ± 14.0 kg) performed single-leg drop landings with their preferred leg from a 30 cm height before and after induced neuromuscular fatigue of the trunk. 3-D analysis of the trunk kinematics was performed using reflective spheres of 14 mm diameter. Maximum voluntary isometric contractions (MVIC) …

Shooting Accuracy And Precision After Tactical Exercises Among Special Weapons And Tactic (Swat) Team Members, Kristina M. Woodford, Monica V. Kock, Jacob D. Fanno, Heather E. Webb

International Journal of Exercise Science: Conference Proceedings

Law enforcement is one of the most stressful occupations and investigations have demonstrated law enforcement officers (LEOs) have greater CVD-related morbidity and mortality than the general population. LEOs are chronically exposed to events including physical dangers and psychological stress. Every day, LEOs utilize their training to save lives and keep themselves and their communities safe, however, Special Weapons and Tactics (SWAT) teams have duties that are beyond the scope of normal law enforcement personnel. Part of this training includes the use of firearms to prepare officers to protect themselves and others in highly dangerous situations. Engaging in these dangerous situations …

Applications Of The Critical Power Model To Dynamic Constant External Resistance Exercise: A Brief Review Of The Critical Load Test, Haley C. Bergstrom, Taylor K. Dinyer, Pasquale J. Succi, Caleb C. Voskuil, Terry J. Housh

Kinesiology and Health Promotion Faculty Publications

The study and application of the critical power (CP) concept has spanned many decades. The CP test provides estimates of two distinct parameters, CP and W′, that describe aerobic and anaerobic metabolic capacities, respectively. Various mathematical models have been used to estimate the CP and W′ parameters across exercise modalities. Recently, the CP model has been applied to dynamic constant external resistance (DCER) exercises. The same hyperbolic relationship that has been established across various continuous, whole-body, dynamic movements has also been demonstrated for upper-, lower-, and whole-body DCER exercises. The asymptote of the load versus repetition relationship is defined as …

Long-Term Disability Following A Hamstring Injury, Savannah Mclain

College of Graduate Studies: Theses & Dissertations

PURPOSE: Injuries to the hamstring complex are one of the most commonly seen lower extremity injuries in athletic populations. It is currently unknown how psychological or sociological factors affect an athlete after the recovery process has ended and if these factors play a role in re-injury rates relating to the hamstring. It is also unknown if athlete confidence level changes while in a fatigued state after an athlete returns to play from a hamstring injury. METHODS: Twenty-six physically active adults with and without a previous hamstring injury were recruited for this study. Participants completed a Qualtrics survey that …

Comparison Of The Times To Exhaustion, Physiological, Perceptual, And Neuromusuclar Responses During Constant Heart Rate, Constant Vo2, And Constant Power Exercise, Pasquale Jiovanni Succi

Theses and Dissertations--Kinesiology and Health Promotion

The purposes of this study were to: 1) Determine if there are differences in the sustainability of exercise when anchored at critical heart rate (CHR), the VO₂ associated with CHR (VO₂CHR), or the power output associated with CHR (PCHR); 2) examine the patterns of responses in power output, metabolic (heart rate [HR], VO₂, respiration rate [RR]), neuromuscular (electromyographic [EMG] amplitude [AMP], mean power frequency [MPF], mechanomyographic [MMG] AMP and MPF, perceptual (rating of perceived exertion [RPE]), and muscle oxygenation responses (%SmO₂) during exercise anchored by HR, VO₂, and power output; and …

Examination Of Sex- And Limb-Specific Fatigue During Unilateral, Isometric Forearm Exercise, Caleb Christian Voskuil

Theses and Dissertations--Kinesiology and Health Promotion

The purpose of this study was to examine the effects of unilateral, isometric handgrip holds to failure for the dominant (Dm) and non-dominant (NDm) limb on ipsilateral ([IPS] exercised side) and contralateral ([CON] non-exercised side) performance fatigability. Twenty individuals participated in this study (Men [n =10]; Women [n = 10; Composite Demographics: Age: 22.2 years; Height: 174.4 cm; Body Mass: 75.0 kg) and completed three visits. Two, 6 s maximal voluntary isometric contractions (MVICs) for the Dm and NDm limb were performed during visit 1, followed by a familiarization of the fatigue test. Visits 2 and 3 included an isometric, …

The Bench Press Grip Width Does Not Affect The Number Of Repetitions Performed At Different Velocity Loss Thresholds, Alejandro Pérez-Castilla, Ivan Jukic, G. Gergory Haff, Amador García-Ramos

Research outputs 2014 to 2021

© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This study aimed (I) to compare the number of repetitions that can be completed to failure (XRM) and before reaching a 15%, 30%, or 45% velocity loss threshold (XVLT) in the bench press exercise performed using different grip widths, and (II) to examine the inter-individual variability in the percentage of completed repetitions with respect to the XRM when the set volume is prescribed based on a fixed number of repetitions (FNR) and several velocity loss thresholds (VLT). Nineteen men performed four separate sessions in a random order where there was a …

Countermovement Jump Assessment For Monitoring Prolonged Fatigue In Collegiate Female Soccer Players, Jeffrey A. Wilkins

Boise State University Theses and Dissertations

Introduction: Females are 4 to 6 times more likely to sustain an anterior cruciate ligament (ACL) injury than their male counterparts during running and cutting sports, such as soccer. This sex disparity is thought to result from altered lower limb neuromuscular control that females present when fatigued at the end of practice or games. Yet, current fatigue monitoring techniques typically vary in their reliability, applicability and efficiency. Purpose: The purpose of this study is to test the feasibility of the countermovement jump (CMJ) to quickly and reliably monitor fatigue in female soccer athletes. Methods: Twenty-two (age: 19.3 ± 1.1 yrs, …

Correlation Between Playertek Performance Data And Fatigue As Measured By The Restq-76 Sport Over The Course Of A Collegiate Soccer Season, Miranda Haas, Hailey Bauer, Victoria Nye, Danielle Kilboy, Shelley Payne

Journal of Sports Medicine and Allied Health Sciences: Official Journal of the Ohio Athletic Trainers Association

Please enjoy Volume 6, Issue 1 of the JSMAHS. In this issue, you will find Professional, Graduate, and Undergraduate research abstracts, and case reports.

Thank you for viewing this 6^th Annual OATA Special Edition.

The Effects Of Fatigue On Lower Extremity Neuromuscular Control, Matthew Thomas Marcen

Theses and Dissertations

Lower extremity injuries and pathologies are amongst the most common issues recreational athletes face. Fatigue is a factor that may impact how the lower extremity performs on a neuromuscular level. Neuromuscular control is a vital aspect of athletic performance and everyday life, that when hindered, may produce pathological results. The research is contradictory on whether or not fatigue produces a significant impact during neuromuscular performance. The purpose of this study is to assess neuromuscular control following a lower extremity fatigue protocol.

This study was a randomized a controlled trial. Twenty-one recreationally active subjects, 10 males and 11 females, between the …

Internal Training Load In Collegiate Basketball Players: Effort Ratings Vs. Heart Rate Measurements In Ncaa Dii Players, Amber Stephens

Honors College Theses

BACKGROUND: College basketball is an intense team sport that utilizes both the aerobic and anaerobic energy systems to play a 40-minute-long game and cover around 2-3 miles on average per game (Narazaki et al 2009). The high workloads can lead to fatigue, which increases injury risk (Garbenytė-Apolinskienė et al 2019). The purpose of this study is to compare subject ratings of perceived exertion (RPE) with objective measures of heart rate during pre-season training.

METHODS: Male and female basketball players from a National Collegiate Athletic Association (NCAA) Division II school wore a heart rate monitor (Firstbeat™) during the first …

The Metabolic Cost Of Pushing Versus Carrying A Golfbag, Leilani Mcdaniel, Edward Merritt, Scott P. Mclean

International Journal of Exercise Science: Conference Proceedings

The two most common non-motorized methods for transporting golf clubs in recreational and amateur golf are carrying a double strap bag or pushing a wheeled cart. The transportation method of golf clubs can have a direct impact on the necessary metabolic, musculoskeletal and cardiorespiratory requirements of golf performance. PURPOSE: To compare the metabolic cost of pushing versus carrying a golf bag. METHODS: Twenty two participants (18 Male, 3 Female, 24.2±8.9 yrs, 176.6±14.5 cm, and 76.2±14.5 kg) were recruited for one session in which they walked one mile while carrying and one mile while pushing a 25lb golf bag (determined as …

Sleep And Stress In The Acute Phase Of Concussion In Youth, Arthur C. Maerlender, Caitlin Masterson, Jessica L. Calvi, Todd Caze, Ross Mathiasen, Dennis Molfese

Center for Brain, Biology, and Behavior: Faculty Publications

This study sought to address the complex interplay between both biological and psychological perceptions of stress and sleep in the acute stages following a mild traumatic brain injury. A secondary goal was to identify potential targets for intervention. Eleven acutely injured youth (mean age 12 years) were studied at home with overnight actigraphy, salivary cortisol and melatonin assays, and subjective ratings of stress and fatigue (injured group). Nine matched control youth also were assessed (control group). Results suggested longer sleep latencies (time to fall asleep) and higher levels of fatigue in the injured group exist (p ¼ 0.025 and p …

Identifying Metabolites As Markers Of Fatigue In Athletes, Christopher D. George

Honors Theses

Fatigue in athletes caused by inadequate rest and other stressors can be severely detrimental to their health, and yet there is no reliable way to measure and track fatigue. Many classical measures of fatigue like body mass and resting heart rate are not reliable ways to track the physical fatigue of an athlete because they can change with many factors. In addition, it is not known how academic stress on top of physical stress affects fatigue. Metabolomics is a relatively new area of study and tracking metabolites offers the possibility to produce biomarkers to assess fatigue. This study collected saliva …

Large Reductions In Match Play Physical Performance Variables Across A Professional Football Season With Control For Situational And Contextual Variables, Matthew Springham, Sean Williams, Mark Waldron, Darren Burgess, Robert Usher Newton

Research outputs 2014 to 2021

This investigation examined match play physical performance across a professional football season using a multicamera computerized tracking system. A linear mixed-effects model, controlling for situational and contextual variables, identified decreases in team average total distance (TD): season quarter 1 (Q1) (11,047 m) > season quarter 2 (Q2) (10,473 m) ( = ; ES = ), season quarter 3 (Q3) (10,449 m) ( < 0.001; ES = ), and season quarter 4 (Q4) (10,385 m) ( < 0.001; ES = ); work rate (WR): Q1 (115 m/min) > Q3 (108 m/min) ( < 0.001; ES = ), Q4 (107 m/min) ( < 0.001; ES = ); Q2 (109 m/min) > Q4 (107 m/min) ( = 0.003; ES = ); high-speed running distance (HSR): Q1 (1,051 m) > Q2 (813 m) ( = 0.006; ES = ); number of high-speed runs (NHSR): Q1 (87) > Q2 (65) ( …

Plyometric Training For Young Male Field Hockey Players, Vijaya Krishnan, Twincy Rajawadha

Internet Journal of Allied Health Sciences and Practice

Background: Field hockey is a team sport requiring a combination of skill set to enhance a player’s performance. Power, Fitness and Agility are few such basic parameters. Newer training protocols are constantly explored to achieve the desired effect and plyometrics is one such method. It is also important to know how long lasting the effects of training are. Methodology: Fifty (50) male field hockey players at interschool and zonal level participated in the study. These sports specific parameters - lower limb power, fitness level and agility - were tested using the vertical jump test, 40-metre sprint test, and shuttle cross …