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Developing An Evidence-Based Model For Healthy Stride Length Prediction, Jungyu Lee, Ho Han, Heontae Kim, Diego Diaz-Vega

International Journal of Exercise Science: Conference Proceedings

Stride length is a vital health indicator, reflecting physical fitness and mobility status. Although several existing formulas aim to estimate stride length, many are limited by a lack of scientific validation, especially among healthy, active adults. This study addresses these limitations by developing a validated model based on healthy adults without known mobility impairments, aiming to establish a more accurate, clinically useful standard for stride length estimation. The model provides a reference range for healthy stride length, usable as a tool to identify individuals at risk of mobility issues. PURPOSE: To develop an evidence-based model for predicting stride length …

Pre- To Post-Season Changes In Body Composition And Movement Quality And Quantity In D1 Football Players, Brian Jones, Ouays Bakcha, Chaehyun Byun, Veronika Kramarenko, Cheyenne Martinez, Joseph Mcclain, Marshall Tousant, Vipa Bernhardt, Michael D. Oldham

International Journal of Exercise Science: Conference Proceedings

INTRODUCTION: Body composition may influence an individual's movement efficiency and performance outcomes. Lower body fat percentage may enable individuals, either sedentary or athletic, to perform movements more efficiently, while greater total lean mass may enhance performance in strength and power-related activities. PURPOSE: The purpose of this study was to analyze the changes in collegiate football players’ total lean mass and body fat percentage, as well as movement quantity and quality measures from preseason to postseason. METHODS: Data from a larger study were analyzed for this project. Division 1 male football players (n= 72, 19.6 ± 1.4 yrs) …

The Relationship Between Drop Vertical Jump Performance Variables And Knee Injury Risk Factors, Cheyenne Martinez, Chaehyun Byun, Marshall Tousant, Brian Jones, Ouays Bakcha, Veronika Kramarenko, Joseph Mcclain, Vipa Bernhardt, Michael D. Oldham

International Journal of Exercise Science: Conference Proceedings

The knee is a common area where injuries occur in athletic populations. Leppänen et al. (2016) reports most common occurrence of knee injuries occur during non-contact events. PURPOSE: The purpose of this study was to explore the relationship between drop vertical jump performance variables and knee injury risk factors. METHODS: Participants were from Division I collegiate sports; football (n = 522), soccer (n = 93), volleyball (n = 35), softball (n = 44), track and field (n = 77), cross country (n = 11), golf (n = 20), and basketball ( …

Reliability And Relationships Between Knee Extension Strength Measurements And Sit-To-Stand Performance In Older Women, Alfonzo G. Salvador, Ty B. Palmer

International Journal of Exercise Science: Conference Proceedings

Knee extension strength measurements, such as peak torque and rate of torque development (RTD), are important characteristics relevant to muscle function. Research has shown that knee extension peak torque and RTD measurements are reliable parameters in young, college-aged adults. It is unclear if these measurements are reliable parameters in older adults. It is also unclear if these measurements are related to sit-to-stand performance. PURPOSE: The purpose of this study was to determine the reliability of knee extension peak torque and RTD measurements and their relationship with sit-to-stand performance in older women. METHODS: Twenty healthy older women (age = …

Sex Differences In Perceptual Adaptations During Heat Acclimation In Endurance Runners, Mario I. Hernandez, Marcos S. Keefe, Ryan A. Dunn, Ruben M. Moya, Kelly B. Elliott, Yasuki Sekiguchi

International Journal of Exercise Science: Conference Proceedings

Exercising in the heat negatively impacts performance. To combat this, heat acclimation (HA) is used to mitigate performance decrements through various physiological and perceptual adaptations. However, perceptual adaptations may differ during HA due to physiological differences between females and males. PURPOSE: To investigate perceptual adaptations between sexes during 7-day HA in endurance runners. METHODS: Seven female and four male endurance runners (age: 22 ± 5 years, body mass: 64.30 ± 7.97 kg, height: 168.00 ± 6.43 cm, maximal oxygen uptake [VO_2max]: 58.30 ± 4.28 mL/kg/min; age: 21 ± 4 years, body mass: 78.63 ± 9.01 kg, …

Evaluating Rotc Cadets’ Knowledge Of General And Sports Nutrition, Sheyla Leon, Adriana Gil, Ryan Sowinski, Lisa C. Colvin, Steven E. Martin, Stella Volpe, Drew E. Gonzalez

International Journal of Exercise Science: Conference Proceedings

Reserve Officer Training Corps (ROTC) cadets regularly undergo highly stressful and physically demanding training, making adequate nutrition knowledge and eating habits essential for optimal health and physical performance. However, there is a paucity of data on ROTC cadets’ general and sports nutrition knowledge. PURPOSE: We evaluated ROTC cadets' general and sports nutrition knowledge. METHODS: Cross-sectional data were obtained from 206 ROTC cadets regarding sports performance and nutrition supplementation knowledge via the validated paper-based questionnaire, Nutrition Knowledge Questionnaire for Athletes (NKQA). The questionnaire data were analyzed using SPSS version 29 software. Shapiro-Wilk Test was used to assess normality. The correct responses …

Effects Of Nmes On Emg-Emg Coherence Across Glenohumeral Muscles During Fatigue In Rotator Cuff Disease, Xinyu Li, Huiying Zhu, Zhihao Fan, Lisa Griffin

International Journal of Exercise Science: Conference Proceedings

Rotator cuff disease (RCD), a common pathology of shoulder pain, can be attributed to muscle weakness and altered humeral head stability, particularly during neuromuscular fatigue. Electromyographic (EMG)-EMG coherence quantifies shared oscillatory input between motoneuron pools, providing insight into motor control deficiencies in RCD. PURPOSE: To investigate the effects of neuromuscular electrical stimulation (NMES) on EMG-EMG coherence across glenohumeral muscles during fatigue in RCD. METHODS: Eight participants with RCD (39 ± 19 yrs) underwent two sessions separated by 72 hrs. Intramuscular EMG was recorded from the supraspinatus (SS), and surface EMG was recorded from the infraspinatus (IS) and middle …

Sex-Specific Responses Of Heat Acclimation On Running Performance In Cool Environmental Conditions, Marcos S. Keefe, Ryan A. Dunn, Kelly B. Elliott, Ruben E. Moya, Yasuki Sekiguchi

International Journal of Exercise Science: Conference Proceedings

Training and competing in the heat negatively impact athlete performance and health. Heat acclimation (HA) involves repeated heat exposures that many endurance athletes use to optimize performance and safety when competing in the heat. Although HA has been shown to improve endurance performance in the heat, contention remains whether it may confer these adaptations to a cool environment. PURPOSE: To Investigate physiological and performance adaptations in a cool environment following HA in endurance athletes. METHODS: Eleven high-level endurance runners (4 males [age: 21 ± 4 years; body mass: 78.63 ± 9.01 kg; height: 182.55 ± 3.97 cm; maximal …

Various Measures Of Arterial Stiffness In Overweight And Obesity: A Systematic Review And Meta-Analysis, Yanbing Zhou, Kazumasa Manabe, Takanobu Okamoto, Hirofumi Tanaka

International Journal of Exercise Science: Conference Proceedings

Overweight and obesity are widely recognized as significant contributors to adverse cardiovascular outcomes. Similarly, arterial stiffness has been strongly linked to an increased risk of cardiovascular events. Despite these parallels, the relationship between arterial stiffness and overweight/obesity remains highly contentious. This lack of consensus may stem from differences in the methodologies used to measure arterial stiffness across studies. PURPOSE: The aim of this systematic review and meta-analysis was to compare arterial stiffness measured with different methods between overweight/obesity and healthy lean controls. METHODS: Systematic searches were conducted in multiple databases. Studies were included if they involved adults aged …

The Associations Between Acute High-Intensity Exercise, Perceived Energy Levels, And Cognition, Myungjin Jung, Paul Dinneen Loprinzi, Zakary Patrick

International Journal of Exercise Science: Conference Proceedings

High-intensity exercise has been theoretically proposed to enhance hippocampal-dependent cognition and impair prefrontal cortex (PFC)-dependent cognition immediately following exercise. However, empirical evidence has been inconsistent in supporting these effects. PURPOSE: This study aimed to reconcile discrepancies between theoretical predictions and empirical findings by exploring the effects of acute high-intensity exercise on different types of cognition. It also examined the potential role of psychological factors, including motivation, perceived energy availability, and perceived energy cost, in the exercise-cognition relationship. METHODS: Fifty-five healthy young adults (mean age = 20.4 years + 1.8) participated in a within-subject experiment involving five visits. The …

The Relationship Between Handgrip Strength And Cardiovascular Risk Factors In Older Women, Adriana N. Guerrero, Emily Sauers

International Journal of Exercise Science: Conference Proceedings

Cardiovascular disease is the leading causes of death in the world. Several clinical trials have found that handgrip strength is associated with lower cardiovascular risk and related death. PURPOSE: The purpose of this study was to explore the relationship between cardiovascular risk factors and handgrip strength. METHODS: Subjects for this study included 8 women from the Congregation of Devine Providence (78.13+7.79 yrs) at Our Lady of the Lake University. Preliminary measures included a medical history questionnaire and the CHAMPS physical activity questionnaire. On the first day of testing, subjects arrived fasted between 7-9am. After a 5-minute rest, blood pressure and …

Effect Of Voltage-Dependent Potassium Channel Antagonism On Vasodilation In Skeletal Muscle Of Humans, Ysabella I. Ruiz-Pick, Rauchelle E. Richey, Brenda L. Gilliland, Tyson C. Garfield, Asim Kichloo, Albert H. Olivencia-Yurvati, Gregory M. Dick, Steven A. Romero

International Journal of Exercise Science: Conference Proceedings

Vascular smooth muscle cells in resistance arterioles express a diverse array of ion channels that control microvascular function. Specifically, voltage-dependent potassium (K_V) channels induce vasodilation via smooth muscle hyperpolarization, positioning these channels as important regulators of vascular tone, and thus blood flow. PURPOSE: Despite substantial research exploring the influence of K_V channels in the regulation of blood flow in various animal models, many aspects of their regulation remain incompletely understood in humans. Specifically, this relationship has never been explored in human skeletal muscle in vivo, the major site of total peripheral resistance. Therefore, we tested …

Does Swearing Improve Exercise Performance And Pain Tolerance?: Cultural Perspective, Jide Yinka Adebiyi, Christos Kyrillou, Elijah Martinez, Anika Patel, Emily Payne, Linsheng Chen, Daroonwan Suksom, Hirofumi Tanaka

International Journal of Exercise Science: Conference Proceedings

Swearing is often generated by self or received from others (e.g., coaches) during physical exertion for various reasons including punctuating the passion, releasing frustration, and resetting the mind. However, the effects of swearing and yelling on exercise performance and pain tolerance remain largely unexplored. Additionally, it is unknown whether individuals from different cultures experience varying degrees of impact of yelling and swearing. PURPOSE: We determined the impact of self-generated and observer-generated swearing and yelling on exercise performance and pain tolerance in individuals living in the US where swearing is often used and heard and in Thailand where such occurrence is …

Effect Of Improved Sleep Regularity On Subendocardial Viability Ratio In Young To Middle-Aged Adults, Gabriel Narvaez, Joaquin Gonzales

International Journal of Exercise Science: Conference Proceedings

Fluctuation of the sleep/wake schedule, commonly referred to as sleep irregularity, is associated with increased risk of cardiovascular disease (CVD). Subendocardial viability ratio (SEVR) is a measure of myocardial perfusion relative to left-ventricular oxygen demand and holds clinical value as a predictor of adverse CVD events. However, little is known on how sleep irregularity could affect SEVR. PURPOSE: To test the hypothesis that a reduction in sleep irregularity would improve SEVR. METHODS: Fourteen adults (9F, 5M, age 35.43 ± 10y, BMI 25.46 ± 3.60 kg/m²) participated in a randomized crossover study that included 12 nights of …

Assessing Accuracy Of Smartwatch-Based Estimation Of Maximum Oxygen Consumption Using Different Watches, Chelsea Seifert, Jenna O'Dell, Aaron Canham, Shae Harris, Shelly Weise

International Journal of Exercise Science: Conference Proceedings

Maximal oxygen consumption (VO_2max) is a predictor of overall health and a key measure of cardiovascular fitness and aerobic capacity. As wearable technology advances, smartwatches are increasingly used to track cardiovascular health metrics. PURPOSE: The purpose of this study was to evaluate the validity and reliability of maximal oxygen consumption estimates from two leading smartwatches. METHODS: 15 participants (11M, 4F), aged 19-29 (23.8±3.2) years, were recruited and met inclusion criteria for the study. VO_2max for all participants was determined in a controlled laboratory environment using a metabolic gas analyzer. Subjects completed a graded exercise test on a …

Force And Gait Mechanics At Reduced Body Weight On A Lower Body Positive Pressure Treadmill, Julia Paige Phillips, Eesha Gudiseva, Silvio Polly Da Costa Valladao, Thomas Andre

International Journal of Exercise Science

International Journal of Exercise Science 18(7): 239-250, 2025. Lower body positive pressure treadmills (LBPPT) have gained increasing attention due to their potential applications in sports training, rehabilitation, and biomechanics research. However, there is limited understanding of how differing body weight percentages influence gait and force production. This study aimed to investigate the relationship between force and gait parameters at different body weight percentages on a LBPPT. Twenty-seven healthy participants completed a series of walking, jogging, and running trials at three different body weight conditions: 100%, 90%, and 75%. Gait parameters, including cadence, stride length, stance time, and ground reaction force, …

A Comparison Between The Traditional And Novel Isometric Mid-Thigh Methods And The Relationship To Countermovement Jump Performance, Meir Magal, Jay R. Hoffman, Matan Amitay

International Journal of Exercise Science

International Journal of Exercise Science 18(3): 226-238, 2025. The isometric mid-thigh pull (IMTP) test using the traditional bar grip (BAR) is a reliable and effective measure of strength performance in different populations. In addition, IMTP performance has been linked to jump performance. Recent research has shown that the pelvic belt (PEL) IMTP method produces higher absolute and relative peak force values than the Bar IMTP method. However, limited scientific data has examined the PEL IMTP method performance data and its relationship to dynamic strength and sports performance. The study aimed to provide a more robust comparison between the BAR and …

Equipping Exercise Science Students With Motivational Interviewing Skills For Real-World Client Interactions, Jessica A. Albers

Educational Practices in Kinesiology

Motivational Interviewing (MI) is a widely recognized communication technique originally developed to treat addictive behaviors. Its application has expanded to various health domains, including exercise science, where it is used to enhance client motivation and adherence to health behaviors. However, despite its proven efficacy, exercise science students often struggle to see the relevance of MI to their future careers, particularly outside of roles focused on health coaching. This teaching and learning resource aims to bridge the gap between MI theory and its practical application for exercise science students. This resource aims to equip students with the communication tools necessary for …

Erratum For Recovery Effects Of Foam Rolling On Psychophysiological Responses In Thai National Male Ice Hockey Players

International Journal of Exercise Science

An erratum is being issued to an article published in 2023 in the International Journal of Exercise Science. The article is entitled “Recovery Effects of Foam Rolling on Psychophysiological Responses in Thai National Male Ice Hockey Players,”: 16(7): 1191-1204, 2023. DOI: https://doi.org/10.70252/DJVQ6733

The initial publication listed the dates of the study as between May 2020 and August 2021.

The dates of the study were between May 2021 and August 2021.

Learn By Doing: A Cure Approach To Teaching Exercise Testing And Prescription, Zakkoyya H. Lewis

Educational Practices in Kinesiology

The purpose of this paper is to outline a course-based undergraduate research experience (CURE) for exercise testing and prescription. The CURE is a non-human research study aimed to evaluate whether readily available fitness applications (apps) follow the Frequency-Intensity- Time-Type (FITT) principle for exercise prescription. The CURE is intended to be incorporated into an in-person introductory level course over the final month of the term. Through the project, students will develop a research question and hypothesis, conduct a literature review of related research, appraise fitness apps, and congregate the results. The overall structure of the CURE is a mini-lecture from the …

The Effects Of A Carbohydrate Mouth Rinse On Soccer-Specific Skills Following A Morning High-Intensity Practice, Lynnsey R. Bowling, Eric M. Scudamore, J Brian Church, Veronika Scudamore

International Journal of Exercise Science

International Journal of Exercise Science 18(6): 215-224, 2025. Carbohydrate mouth rinse (CMR) is suggested to improve aerobic, anaerobic, and skill-related performance. The current study examined the influence of CMR on soccer-specific skills in 13 faster collegiate female soccer players. Athletes completed a control (CON) and two counterbalanced, double-blind experimental sessions. Sessions consisted of a warm-up, high-intensity soccer practice, followed by four soccer-specific skill tests. During the experimental sessions participants rinsed with a color-and-taste-matched CMR or placebo (PLA) solution before the skill tests. Thirst sensation (TS), rating of perceived exertion (RPE) and heart rate (HR) were assessed throughout sessions. Performance scores …

Prevalence Of Exercise Dependence Among High-Intensity Functional Training Practitioners: A Cross-Sectional Analysis, Beatriz E O M R P Da Silva, Marcio Boniatti

International Journal of Exercise Science

International Journal of Exercise Science 18(4): 206-214, 2025. The objective was to explore the prevalence of exercise dependence (ED) risk among regular HIFT exercisers. Secondary objectives include exploring the prevalence of injuries within this population and examining the potential association between ED risk and injury prevalence. This cross-sectional study was conducted in a city in southern Brazil and included HIFT practitioners. ED was evaluated using the Exercise Dependence Scale-Revised (EDS-R). The primary outcome was the prevalence of ED risk. The final analysis included 64 HIFT practitioners, of whom the majority were female (n = 35; 54.7%). The mean EDS-R …

No Differences In Lactate Threshold Across The Menstrual Cycle In Untrained Females, Bianca Alvarenga Rambo Galletti, Grant Chesbro, Rebecca Larson

International Journal of Exercise Science

IInternational Journal of Exercise Science 18(8): 193-205, 2025. In addition to maximal oxygen consumption (VO2max), the Lactate Threshold (LT) is the other major determinant of aerobic exercise performance. This study examined the effects of the menstrual cycle (MC) phase on the LT in untrained females. Eight females and 8 males completed a LT test on a cycle ergometer. The tests were performed across three MC phases: early follicular (EF; menses), ovulatory (O), and mid-luteal (ML). The male participants (control group) were randomly assigned visits at similar time intervals as a regular 28-day cycle. Blood lactate was obtained during the …

Testing As Teaching: A Model For Fitness Assessment Practice And Service-Learning In Exercise Physiology Laboratory Education, Marc Apkarian

Educational Practices in Kinesiology

This resource is intended to provide a model for fitness assessment practice to promote student learning in an undergraduate exercise physiology laboratory course. The goal is for students to gain practical experience in fitness assessment procedures, both through skills practice and service-learning opportunities. The inclusion of an assignment requiring a specified number of assessments to be completed within the term requires additional student practice opportunities. Instruction, demonstration, and initial practice of tests associated with health-related physical fitness components must occur early in the course, so as to permit sufficient opportunities, in class or outside of class, over the remainder of …

Longitudinal Analysis Of Subsequent Musculoskeletal Injuries And Predictive Value Of Index Injuries In Collegiate Women's Field Hockey, Blake O'Neil, Paul Mentele, Xavier Smith, Katherine Pohlgeers, Ernest Rimer, Andreas Stamatis

International Journal of Exercise Science

International Journal of Exercise Science 18(5): 182-192, 2025. This study investigates the longitudinal patterns of musculoskeletal injuries in an NCAA field hockey team, emphasizing the predictive value of index injuries on subsequent injury rates. Analyzing a dataset from a women’s collegiate field hockey team, this research monitored 810 injuries across 124 athletes from 2008 to 2024. The study categorized injuries as local, nonlocal, and recurrent, employing a negative binomial regression to assess the impact of index injuries on the total number of career injuries. Results indicated that ankle sprains, hamstring strains, and back strains significantly predicted the total number of …

Mission Success: Mastering Muscle Function Through Humanoid Analysis, Amber M. Chelette

Educational Practices in Kinesiology

Knowledge of muscle function and human movement are essential skills of all kinesiology students. In the humanoid activity, teams are challenged to determine whether a muscle is essential to the successful development of a humanoid being sent to Mars. This activity provides a significant learning experience regarding muscle anatomy, function, and movement analysis. The humanoid activity is intended for use in a face-to-face upper-level kinesiology anatomy or movement analysis course and best implemented with class sizes of 20-30 students. The total time commitment is approximately 45 minutes.

Observing The Relationship Between Additional Measures Of Handgrip Strength And The 6-Minute Push Test In Ambulatory Young Adults, Eric Naugle, Megan Nelson, Ryan Mcgrath, Matthew Kilgas, Lukus Klawitter

International Journal of Exercise Science

International Journal of Exercise Science 18(5): 170-181, 2025. Manual wheelchair users have been shown to have low functional capacity and limited ability to perform activities of daily living. Conventional protocols for assessing physical attributes such as muscle function in this population have unique boundaries such as expensive testing equipment and procedures not specific to wheelchair propulsion. The measurement of muscle function using electronic handgrip dynamometry has shown promise in assessing additional characteristics beyond strength capacity alone. This study aimed to determine the correlations of electronic handgrip dynamometry derived strength, time to peak force generation, fatigability (22.40±10.12%), isometric control, and asymmetry …

Gps External Load Metric Data And Game Performance In Ncaa Division I Women’S Lacrosse Athletes: A Longitudinal Study, Rachel M. Lifson, Xavier Smith, Ernest Rimer, Andreas Stamatis

International Journal of Exercise Science

International Journal of Exercise Science 18(8): 130-146, 2025. This study investigates the relationship between GPS-derived external load metrics and game performance (win/loss) in NCAA Division I women’s lacrosse athletes. Utilizing data from three seasons (2022-2024), the study analyzed 1,687 observations from 54 players to identify key performance indicators correlating with game outcomes. GPS metrics including Total Distance (TD), High-Speed Distance (HSD), Very High-Speed Efforts (VHSE), Total Player Load (TPL), High Inertial Movement Analysis (High IMAs), and Total Acceleration Load (TAL) were assessed. Multivariate logistic regression results indicate that VHSE is the most significant predictor of game success, with VHSE showing …

A Comparison Of External Loads In Division Iii Men's Lacrosse Between High Competition Matches And Low Competition Matches, Patrick M. Moore, Thomas G. Bowman, Yasmine I. Jones, Price Blair, Sean M. Collins

International Journal of Exercise Science

International Journal of Exercise Science 18(3): 158-169, 2025. Lacrosse is an open-field, invasion sport with limited knowledge of the physiological demands of gameplay at the Division III level. This study aimed to investigate the external loads of Division III men’s lacrosse players during NCAA season games. Comparisons were made between the external loads placed on the athletes in high competition versus those placed on the athletes in low competition matches. High competition matches were defined as matches against teams that qualified for the NCAA tournament whereas low competition matches included teams that did not meet high competition requirements. The dependent …

Comparison Of Virtual Vs. Traditional Cycling Exercise On Perceived Duration And Exercise Enjoyment: A Pilot Study, Kyle W. Reason, Lauren G. Killen, T. Scott Lyons, Jean A. Helm Allen, Matt Green

International Journal of Exercise Science

International Journal of Exercise Science 18(2): 147-157, 2025. Participating in regular physical activity has been shown to increases one’s quality of life. Individuals may choose not to participate in regular physical activity because of a perceived lack of time and enjoyment. With the potential of these barriers to decrease exercise adherence, the purpose of this study was to compare perceived exercise duration and enjoyment between a virtually interactive stationary bike and a clamped workload on a standard non-interactive stationary bike. Thirteen active participants completed a VO₂ peak test and four counterbalanced trials (two 20-min, two 40-min) with one trial …