Medicine and Health Sciences Commons^™

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 …

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 …

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, …

Long-Term Disability Following A Hamstring Injury, Savannah Mclain

Electronic Theses and 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 …

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 …

Power Output, Cadence, And Torque Are Similar Between The Forward Standing And Traditional Sprint Cycling Positions, Paul F. J. Merkes, Paolo Menaspà, Chris R. Abbiss

Research outputs 2014 to 2021

Purpose:

Compare power output, cadence, and torque in the seated, standing, and forward standing cycling sprint positions.

Methods:

On three separated occasions (ie, one for each position), 11 recreational male road cyclists performed a 14 seconds sprint before and directly after a high-intensity lead-up. Power output, cadence, and torque were measured during each sprint. Results: No significant differences in peak and mean power output were observed between the forward standing (1125.5 ± 48.5 W and 896.0 ± 32.7 W, respectively) and either the seated or standing positions (1042.5 ± 46.8 W and 856.5 ± 29.4 W; 1175.4 ± 44.9 W …

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) ( …

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 and Staff 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 …

Will Pitch Velocity Remain Consistent Throughout A Competitive Baseball Season Following Blood Flow Restriction: An Observational Study, Mackenzie Marie Evans

Graduate Theses, Dissertations, and Problem Reports

Context: Blood flow restriction (BFR) has previously been used in a rehabilitation setting to decrease the external load applied to post-surgical patients and those with chronic debilitating conditions. BFR in a performance context has been explored minimally, particularly as it applies to baseball pitching over time. Objective: The purpose of this study was to retrospectively investigate the trend in throwing velocity of fastballs with BFR implementation over one competitive season. Design: This study was a retrospective longitudinal design on pitching velocity of fastballs throughout a competitive season. Setting: The data collection and analysis was completed at …

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 …

Mechanisms Underpinning An Improvement In Dynamic Muscle Force Production Following A High-Intensity Warm-Up, Cody J. Wilson

Theses: Doctorates and Masters

The present research explored the mechanisms underpinning the enhancement of voluntary knee extensor torque after (1) extensive task-specific practice, and then (2) brief, intense warm-up exercise (conditioning activity; CA) as part of a complete warm-up routine. The same warm-up was completed in two Experiments (detailed below). In Experiment 1, voluntary (180⁰·s-1; T180) and electrically-evoked (isometric) knee extensor torques and electromyogram (EMG) and muscle temperature (Tm) data were recorded before and after (1) extensive task-specific practice where peak voluntary knee extensor performance was achieved, and (2) two isokinetic CAs matched for total concentric contraction time (CA60: 5 repetitions at 60⁰·s-1 vs. …

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 …

Effects Of Neuromuscular Fatigue Resulting From Repeat Sprint Exercise Among Trained Cyclists On Measures Of Strength And Power Performance, Robert B. Blaisdell

Electronic Theses and Dissertations

The purpose of this dissertation is to better understand the role of repeated-sprint ability (RSA) and resulting fatigue in cyclists; how it relates to measures of aerobic power and strength and power performance indices- due to the nature of cycling competitions and the necessity of RSA for success.

The first part of this dissertation attempted to elucidate the relationship between RSA and aerobic power and strength/ power measures in competitive cyclists. The purpose was to potentially illustrate the importance of the inclusion of strength and power training in the training regimen of cyclists. The findings showed several statistically significant relationships …

The Effects Of Submaximal Fatigue On The Y-Balance Test Scores, Caleb Bissette, Kayla Curatolo, Jacob Wall, Megan Wortman

EXSI 432/532: Research Methods in Exercise Science: Research Proposal Posters

The purpose of this study was to assess how scores on the Y -balance test differed before and after submaximal fatigue. It was hypothesized that submaximal fatigue would cause Y-Balance Test scores to decrease in the anterior, posteromedial, and posterolateral directions.

The Effects Of An Eight Over Cricket Bowling Spell Upon Pace Bowling Biomechanics And Performance Within Different Delivery Lengths, Samuel J. Callaghan, Robert G. Lockie, Warren A. Andrews, Walter Yu, Robert F. Chipchase, Sophia Nimphius

Research outputs 2014 to 2021

Pace bowlers must often perform extended bowling spells with maximal ball release speed (BRS) while targeting different delivery lengths when playing a multi-day match. This study investigated the effect of an eight over spell upon pace bowling biomechanics and performance at different delivery lengths. Nine male bowlers (age = 18.8 ± 1.7 years) completed an eight over spell, while targeting different lengths (short: 7–10 m, good: 4–7 m, full: 0–4 m from the batter’s stumps, respectively) in a randomized order. Trunk, knee and shoulder kinematics and ground reaction forces at front foot contact (FFC), as well as run-up velocity and …

The Influence Of Fatiguing Exercise On Power Output, Lena Kate Perry

University of the Pacific Theses and Dissertations

Physical fatigue impairs performance during high power, short duration activities. As technological developments permit new methods of measuring this effect, it is important to validate existing paradigms. The purpose was to determine if kinetic measurements from vertical jump (VJ) tests are influenced by fatigue based on explosive power outputs. A sample of athletes (9 men, 26 women) from a Division I NCAA sports program completed testing. To establish baseline VJ kinetics, athletes performed a controlled warm-up and then completed six jumps using Sparta Science technology, each separated by 15s rest. Sparta software computed three force outputs: Load, Explode and Drive. …

Change In Knee Flexor Torque After Fatiguing Exercise Identifies Previous Hamstring Injury In Football Players, Cameron Lord, Fadi Ma'ayah, Anthony J. Blazevich

Research outputs 2014 to 2021

Muscular fatigue and interlimb strength asymmetry are factors known to influence hamstring injury risk; however, limb‐specific exacerbation of knee flexor (hamstrings) torque production after fatiguing exercise has previously been ignored. To investigate changes in muscular force production before and after sport‐specific (repeated‐sprint) and non‐specific (knee extension‐flexion) fatiguing exercise, and explore the sensitivity and specificity of isokinetic endurance (ie, muscle‐specific) and single‐leg vertical jump (ie, whole limb) tests to identify previous hamstring injury. Twenty Western Australia State League footballers with previous unilateral hamstring injury and 20 players without participated. Peak concentric knee extensor and flexor (180°∙s⁻¹) torques were …

Neuromuscular Factors Contributing To Reductions In Muscle Force After Repeated, High-Intensity Muscular Efforts, Benjamin J. C. Kirk

Theses: Doctorates and Masters

Fatigue can accumulate sufficiently to limit muscular force production during repeated, forceful muscle contractions, including those that occur in the occupational, clinical and athletic settings. Fatigue during such efforts is likely to result from disturbances to multiple processes in the nervous system and muscle. However, previous research examining the mechanisms underpinning fatigue have typically required subjects to perform low-level constant-force contractions or to repeat maximal efforts in a single set format. Such tasks do not translate well to occupational, daily living or athletic situations where high-intensity, yet submaximal, repeated efforts may be performed in work bouts (or sets) with brief …

Effect Of Physical Fatigue On The King-Devick Concussion Assessment, Audrey Bauer

Health, Human Performance and Recreation Undergraduate Honors Theses

The Abstract for this thesis is not available at this time.

The Effects Combining Cryocompression Therapy Following An Acute Bout Of Resistance Exercise On Performance And Recovery, William H. Dupont, Brek J. Meuris, Vincent H. Hardesty, Emily C. Barnhart, Landon H. Tompkins, Morricia J. P. Golden, Clayton J. Usher, Paul A. Spence, Lydia K. Caldwell, Emily M. Post, Matthew K. Beeler, William J. Kraemer

Health and Sport Sciences Faculty Scholarship

Compression and cold therapy used separately have shown to reduce negative effects of tissue damage. The combining compression and cold therapy (cryocompression) as a single recovery modality has yet to be fully examined. To examine the effects of cryocompression on recovery following a bout of heavy resistance exercise, recreationally resistance trained men (n =16) were recruited, matched, and randomly assigned to either a cryocompression group (CRC) or control group (CON). Testing was performed before and then immediately after exercise, 60 minutes, 24 hours, and 48 hours after a heavy resistance exercise workout (barbell back squats for 4 sets of 6 …

The Effect Of Loaded Backpack Usage On Balance After A Functional Daily Stair Task, Shanni Moorse, Alyssa Haus, Seth A. Paradis

Human Kinetics & Applied Health Sciences Student Works

Backpack usage is common among many age groups, including college students. As students go about their daily routines, they may reach cardiorespiratory fatigue (CRF). CRF achieved via a treadmill workout has been shown to significantly increase body sway during balance tasks compared to pre- fatigue values. Additionally, it has been shown that increasing backpack loads decreases balance ability. PURPOSE: The purpose of this study is to combine these two ideas to assess the effect of loaded backpack usage on balance by quantitatively measuring balance after a functional daily stair task (FDST) designed to resemble CRF. METHODS: 7 male and 13 …

The Manipulation Of Pace Within Endurance Sport, Sabrina Skorski, Chris Abbiss

Research outputs 2014 to 2021

In any athletic event, the ability to appropriately distribute energy is essential to prevent premature fatigue prior to the completion of the event. In sport science literature this is termed “pacing.” Within the past decade, research aiming to better understand the underlying mechanisms influencing the selection of an athlete’s pacing during exercise has dramatically increased. It is suggested that pacing is a combination of anticipation, knowledge of the end-point, prior experience and sensory feedback. In order to better understand the role each of these factors have in the regulation of pace, studies have often manipulated various conditions known to influence …

The Effects Of Flexor Pronator Mass Fatigue On Medial Elbow Stability, Nathaniel Harvey Millard

Theses, Dissertations and Capstones

Introduction: The medial elbow is supported from valgus loading with the ulnar collateral ligament (UCL), the flexor pronator mass (FPM), and the radial head. Fatigue of muscle can lead to a decrease in force production. The decrease in force production can lead to a decrease in joint stability. This study tested the effect of fatigue of the FPM muscles on the width of the medial joint space.

Methods: Thirty-one participants volunteered for this study (18 female and 12 male, 1 excluded; mean height 170.2±10.1 cm, mean weight 71.2±15.6 kg, mean age 21.53±1.87 years old). Ultrasound images of the width of …

Effects Of Different Exercise Modalities On Fatigue In Prostate Cancer Patients Undergoing Androgen Deprivation Therapy: A Year-Long Randomised Controlled Trial, Dennis Taaffe, Robert Newton, Nigel Spry, David Joseph, Suzanne K. Chambers, Robert Gardiner, Brad Wall, Prue Cormie, Kate Bolam, Daniel A. Galvao

Research outputs 2014 to 2021

Background

Physical exercise mitigates fatigue during androgen deprivation therapy (ADT); however, the effects of different exercise prescriptions are unknown.

Objectives

To determine the long-term effects of different exercise modes on fatigue in prostate cancer patients undergoing ADT.

Design, setting, and participants

Between 2009 and 2012, 163 prostate cancer patients aged 43–90 y on ADT were randomised to exercise targeting the musculoskeletal system (impact loading + resistance training; ILRT; n = 58), the cardiovascular and muscular systems (aerobic + resistance training; ART; n = 54), or to usual care/delayed exercise (DEL; n = 51) for 12 mo across university-affiliated exercise clinics …

The Acute Effect Of Exposure To Barefoot Running On Vo2 Peak, Fatigue, And Time To Exhaustion In Recreational Runners, A. Pecha, R. Dowden, M. Miltenber, T. Keshel, S. Munford, E. Sauers

International Journal of Exercise Science: Conference Proceedings

Please refer to the pdf version of the abstract located adjacent to the title.