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Articles 151 - 180 of 651
Full-Text Articles in Entire DC Network
Dehydration And Heavy Resistance Exercise Effect On Intracellular And Intramuscular Fluid Shifts, Mia A. Uriegas, Nigel Jiwan, Casey Appell, Andrew Schindel, Ryanoneil Ellis, Jalyn Dunlap, Christopher Washington, Isabell R. Trevino, Carson W. Lewis, Jan-Joseph S. Rolloque, Ruben Moya, Marcos Keefe, Ryan Dunn, Yasuki Sekiguchi, Hui-Ying Luk
Dehydration And Heavy Resistance Exercise Effect On Intracellular And Intramuscular Fluid Shifts, Mia A. Uriegas, Nigel Jiwan, Casey Appell, Andrew Schindel, Ryanoneil Ellis, Jalyn Dunlap, Christopher Washington, Isabell R. Trevino, Carson W. Lewis, Jan-Joseph S. Rolloque, Ruben Moya, Marcos Keefe, Ryan Dunn, Yasuki Sekiguchi, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
Dehydration may alter the ratio between the extracellular water (ECW) and intracellular water (ICW). Nevertheless, it is unknown whether the ratio between ECW and ICW following resistance exercise (RE) is affected by dehydration. PURPOSE: To determine the effect of dehydration on fluids shift after heavy RE. METHODS: 13 resistance-trained men (age: 21±2years; height: 176.4±6.0cm; weight: 79.5±11.5kg) completed a heavy RE consisting of bilateral leg press and knee extension exercises (5 x 10 at 80% of 1 repetition maximum with 2-mins rest between sets & exercises) either under a hydrated (HS; urine specific gravity [USG] < 1.020) or a dehydrated state (DS; USG ≥ 1.020; 24-hour fluid restriction). The two conditions were separated by two weeks. The ratio of ICW/ECW and total body water (TBW) were measured before (PRE), 1 hour (1H), and 3H after RE using bioelectrical impedance spectroscope (BIS). Additionally, vastus lateralis muscle samples were collected at PRE, 1H, and 3H via muscle biopsy. Muscle samples were weighed (Wt) before (Wet) and after (Dry) heating at 80°C for 55 minutes. For BIS parameters, values were normalized to each participant's HS PRE value. For muscle Wt, percent changes from Dry to Wet were calculated. Repeated measures ANOVAs were used to identify the differences. RESULTS: A significant …
The Effects Of Weekly And Game-Day Weather Conditions On Soccer Game-Day Performance, Ciriany Arrazola, Jan-Joseph S. Rolloque, Kelly B. Elliott, Ruben Moya, Marcos Keefe, Yasuki Sekiguchi
The Effects Of Weekly And Game-Day Weather Conditions On Soccer Game-Day Performance, Ciriany Arrazola, Jan-Joseph S. Rolloque, Kelly B. Elliott, Ruben Moya, Marcos Keefe, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
Game-day performance may be influenced by factors such as training load management, hydration status, and environmental conditions at all levels of competition in soccer. However, there is currently a lack of literature examining the effects of weather conditions, prior to and during game-days, on game-day performance in soccer players. PURPOSE: To observe the effects of the 7-day average of weather conditions prior to game-day and average game-day weather conditions on game-day performance, more specifically heart rate (HR) and running velocity. METHODS: Twenty-one male semi-professional soccer players (mean ± SD; age: 22 ± 2 yr; mass: 77.3 ± 6.9 …
Systemic Inflammation Persists In Rats With Heart Failure After A Short-Term Endurance Training Protocol, Quinten Pigg, Dillon Harris, Aaron Garcia, Daniela Sayuri Inoue, Mariana Janini Gomes
Systemic Inflammation Persists In Rats With Heart Failure After A Short-Term Endurance Training Protocol, Quinten Pigg, Dillon Harris, Aaron Garcia, Daniela Sayuri Inoue, Mariana Janini Gomes
International Journal of Exercise Science: Conference Proceedings
Exercise has been shown to produce an anti-inflammatory response and an increased exercise tolerance in heart failure (HF) patients. In rats, monocrotaline (MCT) leads to pulmonary arterial hypertension-induced HF (PAH-HF), resulting in exercise intolerance and chronic inflammation. However, little is known about the effects of endurance training in rats with PAH-HF induced by monocrotaline. PURPOSE: To investigate the effects of an endurance training protocol on systemic inflammatory markers and exercise tolerance in rats with HF. METHODS: 30 male Wistar rats (~250g) were randomly divided into 4 groups: control untrained (CU); control trained (CT), PAH-HF untrained (HFU), and PAH-HF trained (HFT). …
Micronized Biocompatible Ceramic Promotes Muscle Derived Il-6 Release In Disuse, Jacob Kendra, Shadi Golpasandi, Alexandra Naman, Mariam Othman, Joo Kim, Rachel Rauth, Khaled Moustafa, John Lawler, Aaron Morton
Micronized Biocompatible Ceramic Promotes Muscle Derived Il-6 Release In Disuse, Jacob Kendra, Shadi Golpasandi, Alexandra Naman, Mariam Othman, Joo Kim, Rachel Rauth, Khaled Moustafa, John Lawler, Aaron Morton
International Journal of Exercise Science: Conference Proceedings
Skeletal muscle is remarkably plastic and undergoes significant muscle wasting in response to mechanical unloading. Chronic bedrest and microgravity conditions promote disuse-induced muscle atrophy and dysfunctional myogenesis. While these pathological effects have been well documented, there are currently no effective therapies to remedy this muscle loss. Time-release ion matrices (TRIM) are amorphous non-crystalline biomaterials that promote regenerative gene transcription when injected in soft tissue. However, the detailed pathways involved in TRIM activated regeneration of skeletal muscle are unexplored. Degenerative and regenerative inflammation are key processes in regeneration. PURPOSE: The purpose of this study was to investigate muscle inflammation in response …
Maximal Isometric Contraction In Skeletal Muscle Of Endurance Trained Rats With Heart Failure, Dillon Harris, Jacob Kendra, Quinten Pigg, Shadi Golpasandi, Aaron Garcia, Daniela Inoue Yoshimura, Aaron Morton, Mariana Janini Gomes
Maximal Isometric Contraction In Skeletal Muscle Of Endurance Trained Rats With Heart Failure, Dillon Harris, Jacob Kendra, Quinten Pigg, Shadi Golpasandi, Aaron Garcia, Daniela Inoue Yoshimura, Aaron Morton, Mariana Janini Gomes
International Journal of Exercise Science: Conference Proceedings
Heart failure (HF) leads to debilitating skeletal muscle dysfunction and atrophy, with exercise tolerance (ET) remaining a crucial indicator of clinical, practical, and mortality-based outcomes. To simulate these comorbidities, monocrotaline (MCT) is a pharmacological agent typically used to aid in replicating experimental models of right ventricle HF. PURPOSE: To investigate the viability of moderate-intensity aerobic training to preserve skeletal muscle function and ameliorate muscle atrophy in MCT-induced HF. METHODS: Thirty 8-week-old male Wistar rats were randomly divided into sedentary (SED) or trained groups (EX; 30min/day treadmill running sessions, 5 days/wk, for 4 weeks) at 60% intensity determined by a maximal …
Quantification Of Mitochondrial Morphology In Whole Muscle, Shadi Golpasandi, Jacob Kendra, Alexandra Naman, Aaron Morton
Quantification Of Mitochondrial Morphology In Whole Muscle, Shadi Golpasandi, Jacob Kendra, Alexandra Naman, Aaron Morton
International Journal of Exercise Science: Conference Proceedings
Mitochondrial dysfunction is well described in many chronic illnesses including musculoskeletal, neurodegenerative, and cardiovascular diseases. In this regard, mitochondrial network morphology has been implicated as a biomarker of disease correlating increased mitochondrial fragmentation to impaired cellular function. While advancements in imaging techniques have furthered our understanding of mitochondrial dynamics in live cells, easily accessible approaches for accurate quantification of in situ, whole muscle mitochondria are lacking. PURPOSE: The purpose of this study was to validate a proof-of-concept method capable of quantifying 3D mitochondrial network morphology in whole mount skeletal muscle and then applying it to mitochondrial morphology analysis in multiple …
The Effects Of Summer Training On Neuromuscular Performance In Semi-Professional Soccer Players, Jan-Joseph S. Rolloque, Kathryn E. Southall, Ruben Moya, Travis Anderson, Kelly B. Elliott, Kealey J. Wohlgemuth, Mckenzie M. Hare, William M. Adams, Jacob A. Mota, Yasuki Sekiguchi
The Effects Of Summer Training On Neuromuscular Performance In Semi-Professional Soccer Players, Jan-Joseph S. Rolloque, Kathryn E. Southall, Ruben Moya, Travis Anderson, Kelly B. Elliott, Kealey J. Wohlgemuth, Mckenzie M. Hare, William M. Adams, Jacob A. Mota, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
While training load (TL) and heat exposure have been shown to independently influence neuromuscular performance, these combined effects have not been fully explored. PURPOSE: To investigate the effects of summer soccer training on neuromuscular performance in semi-professional male soccer players. METHODS: 21 semi-professional male soccer players (age: 21.4 ± 1.9 years; mass: 77.3 ± 7.0 kg; height: 179.2 ± 6.4 cm) visited the laboratory on two occasions separated by three weeks of training. During each visit, ultrasound imaging was collected to determine muscle cross-sectional area (CSA) of the dominant rectus femoris (RF) and vastus lateralis (VL). Maximal voluntary …
Release Of Microrna15a/16 From Skeletal Muscle During Exercise Regulates Proteostasis In Muscle And Cancer, Patrick Ryan, Selina Uranga, James D. Fluckey
Release Of Microrna15a/16 From Skeletal Muscle During Exercise Regulates Proteostasis In Muscle And Cancer, Patrick Ryan, Selina Uranga, James D. Fluckey
International Journal of Exercise Science: Conference Proceedings
Proteostasis, the intricate process of maintaining the proteome, is a critical matter for cellular health. The regulation of the multiple intersecting metabolic pathways comprising the proteostatic network is correspondingly complex and incompletely understood; however, a new and intriguing candidate in understanding this process has emerged in the form of microRNA (miRNA), small RNA species which are capable of regulating hundreds of genes at once by binding to and degrading mRNA transcripts. We have previously shown that muscle contraction results in the release of two miRNA species (miR15a/16) from skeletal muscles, and that a perfusate rich in these miRNAs slows growth …
Assessing Dual Task Gait Asymmetries In Older Adults Using Wireless Instrumented Shoe Insoles, Madison M. Treece, Jennifer M. Yentes, Sofie De Wandel, Minchae C. Kang, Marielle P.K.J. Engelen, Nicolaas E. Deutz, Andrew D. Nordin
Assessing Dual Task Gait Asymmetries In Older Adults Using Wireless Instrumented Shoe Insoles, Madison M. Treece, Jennifer M. Yentes, Sofie De Wandel, Minchae C. Kang, Marielle P.K.J. Engelen, Nicolaas E. Deutz, Andrew D. Nordin
International Journal of Exercise Science: Conference Proceedings
Gait asymmetries have been suggested to be indicators of pathology. Walking while simultaneously completing a secondary cognitive task, or dual task, has been found to alter gait parameters such as stride time and stride length in aging populations. Gait asymmetries are commonly exacerbated in older adults under dual task conditions as attention is diverted away from walking. Although clinically relevant, assessing gait biomechanics outside of traditional laboratory settings can be challenging, but is possible using lightweight wireless sensors. PURPOSE: Our aim was to assess the influence of a cognitive load on gait asymmetries in older adults using wireless instrumented …
Effects Of Continuous Aerobic Exercise On Skeletal Muscle Atrophy Induced By Heart Failure, Carolina Tonon, Bertha F. Polegato, Quinten Pigg, Dillon Harris, Aaron Garcia, Daniela S. Inoue, Mariana Janini Gomes
Effects Of Continuous Aerobic Exercise On Skeletal Muscle Atrophy Induced By Heart Failure, Carolina Tonon, Bertha F. Polegato, Quinten Pigg, Dillon Harris, Aaron Garcia, Daniela S. Inoue, Mariana Janini Gomes
International Journal of Exercise Science: Conference Proceedings
Heart failure is a common and severe disease that worsens morbidity, mortality, and quality of life. One of the clinical manifestations of heart failure is peripheral muscular atrophy, whose presence impacts the prognosis of heart failure patients. Inflammation is one of the main mechanisms related to muscle atrophy. We hypothesized that inflammation, through excessive activation of the Nlrp3 inflammasome, would be tightly associated with skeletal muscle atrophy induced by heart failure. Additionally, aerobic exercise, well known for its anti-inflammatory action, would counteract this condition in a rat model of heart failure. PURPOSE: We aimed to evaluate the effects of continuous …
Correlations Between Measured-To-Predicted Resting Metabolic Rate Ratio And Psychological Variables In Active Women, Jaylynn Rasco, Madelin R. Siedler, Christian Rodriguez, Christine M. Florez, Christian Lavalle, Ethan Tinoco, Alexandra Brojanac, Grant M. Tinsley
Correlations Between Measured-To-Predicted Resting Metabolic Rate Ratio And Psychological Variables In Active Women, Jaylynn Rasco, Madelin R. Siedler, Christian Rodriguez, Christine M. Florez, Christian Lavalle, Ethan Tinoco, Alexandra Brojanac, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
RMRratio provides an indication of energy availability by comparing measured resting metabolic rate (RMR) to that predicted by an equation using values such as age, height, and lean mass. RMRratio has been associated with psychological variables such as cognitive restraint (CR) and Drive for Thinness (DT) in young, active women. PURPOSE: The purpose of this study was to assess the strength of correlation between these psychometric variables and RMRratio values using a variety of RMR prediction equations. METHODS: Forty-one generally healthy women were included in this analysis. All participants self-attested to engaging in two or more hours of moderate- to …
Morning Vs Afternoon Differences In Hydration Status Assessments, Karissa A. Mesquita, Jan-Joseph S. Rolloque, Marcos Keefe, Ryan Dunn, Casey Appell, Nigel Jiwan, Hui-Ying Luk, Yasuki Sekiguchi
Morning Vs Afternoon Differences In Hydration Status Assessments, Karissa A. Mesquita, Jan-Joseph S. Rolloque, Marcos Keefe, Ryan Dunn, Casey Appell, Nigel Jiwan, Hui-Ying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
First-morning spot samples are commonly used to assess hydration status accurately. However, there is a lack of literature examining the accuracy of afternoon spot samples to assess hydration status compared to the morning samples and the relationships between variables, especially in the afternoon assessments. PURPOSE: To compare the accuracy of using spot samples to monitor hydration status in both morning and afternoon and to identify relationships between each hydration assessment. METHODS: 24 participants (12 males; age: 21±2years, mass: 81.0±15.9kg; 12 females; age: 22±3 years, mass: 68.8±15.2kg) completed this study. Hydration measurements of urinary indices (urine color [UCOL …
The Effect Of Eccentric Muscle-Damaging Exercise In The Heat On Perceptual Stress Measures During Future Exertional-Heat Exposure, Erica A. Hollis, Ryan Dunn, Casey Appell, Marcos Keefe, Nigel Jiwan, Hui-Ying Luk, Yasuki Sekiguchi
The Effect Of Eccentric Muscle-Damaging Exercise In The Heat On Perceptual Stress Measures During Future Exertional-Heat Exposure, Erica A. Hollis, Ryan Dunn, Casey Appell, Marcos Keefe, Nigel Jiwan, Hui-Ying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
Multiple bouts of exertional-heat exposure can assist in reducing the magnitude of perceived stress during future heat exposures. Recently, eccentric muscle-damaging exercise has also been proposed as a beneficial preconditioning modality to assist with exercise in the heat due to the potential effects on improving physiological and thermoregulatory responses during exercise. PURPOSE: This study investigated the effect of muscle-damaging exercise in the heat, compared to a thermoneutral condition, on minimizing perceptual stress during future exertional-heat exposure. METHODS: Ten physically active males (mean ± SD; age, 23 ± 3 years; body mass, 78.7 ± 11.5 kg; height, 176.9 ± …
Relationship Between Muscle Cross-Sectional Area And Counter-Movement Jump Performance In Semi-Professional Athletes, Tyler B. Mccollum, Jan-Joseph S. Rolloque, Kealey J. Wohlgemuth, Marcos Keefe, Kathryn E. Southall, Mckenzie M. Hare, Ruben Moya, Kelly B. Elliott, Jacob A. Mota, Yasuki Sekiguchi
Relationship Between Muscle Cross-Sectional Area And Counter-Movement Jump Performance In Semi-Professional Athletes, Tyler B. Mccollum, Jan-Joseph S. Rolloque, Kealey J. Wohlgemuth, Marcos Keefe, Kathryn E. Southall, Mckenzie M. Hare, Ruben Moya, Kelly B. Elliott, Jacob A. Mota, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
Muscle cross-sectional area (CSA) has been identified as a major predictor of the force production capabilities in athletes, while countermovement jumps (CMJ) can be used to assess power production translated into jump height. However, there is a lack of literature looking at the relationship between CSA and CMJ performance in athletes at different timepoints throughout a competitive season. PURPOSE: To examine the relationship between change in lower limb muscle CSA and CMJ performance in semi-professional soccer players over the course of a season. METHODS: Twenty-three male players (mean ± standard deviation; age: 21.3 ± 2 years; height: 178.4 ± 6.7 …
Validity Of Body Volume Estimates From A Smartphone 3-Dimensional Scanning Application, Ethan G. Tinoco, Christian Rodriguez, Madelin R. Siedler, Christian Lavalle, Christine M. Florez, Sarah White, Alexandra Brojanac, Jaylynn Rasco, Gabrielle Dehaven, Grant M. Tinsley
Validity Of Body Volume Estimates From A Smartphone 3-Dimensional Scanning Application, Ethan G. Tinoco, Christian Rodriguez, Madelin R. Siedler, Christian Lavalle, Christine M. Florez, Sarah White, Alexandra Brojanac, Jaylynn Rasco, Gabrielle Dehaven, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Body volume (BV) indicates the total 3-dimensional (3D) space an individual occupies. BV is either used alongside body mass in density-based two-compartment models or in conjunction with other body components in multi-compartment models to estimate body composition (BC). BV estimates are typically produced by costly laboratory methods, such as hydrostatic weighing or air-displacement plethysmography (ADP). However, more accessible options are emerging. Smartphone-based 3D scanning uses the phone’s built-in camera to provide a BV estimate in a time-efficient and cost-effective manner. However, few investigations have validated this method against an accepted laboratory technique. PURPOSE: To determine the validity of BV from …
Characterization Of Physical And Cognitive Performance And Hydration In Older Adults, Corey Lawrence, Casey R. Appell, Nigel C. Jiwan, Jarrod Blinch, Alan T. Ky, Ruben M. Moya, Cherish A. Keeney, Yasuki Sekiguchi, Hui-Ying Luk
Characterization Of Physical And Cognitive Performance And Hydration In Older Adults, Corey Lawrence, Casey R. Appell, Nigel C. Jiwan, Jarrod Blinch, Alan T. Ky, Ruben M. Moya, Cherish A. Keeney, Yasuki Sekiguchi, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
In younger adults, dehydration has been shown to impair physical and cognitive performance. Older adults are habitually hypohydrated alongside experiencing physical and cognitive performance deficits. Despite these deficits, the link between these factors remains unexplored. Purpose: To examine the effect of hydration status on physical and cognitive performance in older adults. Methods: Sixteen (5 men and 11 women) community-dwelling adults (74±7yr; 78.2±15.0kg; 161±11cm) completed measurements of hydration status (urine specific gravity [USG], urine color), bioelectrical impedance analysis (lean mass, fat mass, total body fluid, intracellular to extracellular fluid ratio [ICF: ECF]), blood pressure, physical performance (handgrip strength test, sit-to-stand test, …
Effects Of Menstrual Cycle Phase On Cold Pressor Test Responses, Zachary R. Oldham, Caitlin P. Jarrard, Craig G. Crandall
Effects Of Menstrual Cycle Phase On Cold Pressor Test Responses, Zachary R. Oldham, Caitlin P. Jarrard, Craig G. Crandall
International Journal of Exercise Science: Conference Proceedings
Previous research has demonstrated women in the luteal phase have a greater time to pain threshold with similar cardiovascular responses during a cold pressor test (CPT), however, not all studies have confirmed these findings. PURPOSE: The purpose of this study was to test the hypothesis that during a CPT, perceived pain will be lower in females in the luteal phase, with no difference in the accompanying cardiovascular or autonomic responses to that CPT between menstrual cycle phases. METHODS: Thirty healthy women, 15 in the follicular phase of the menstrual cycle (age: 27 ± 5 yrs, body mass: 73 …
Dehydration And Resistance Exercise Increased Muscle And Immune Cell Oxidative Stress In Trained Men, Casey R. Appell, Nigel C. Jiwan, Yasuki Sekiguchi, Danielle E. Levitt, Hui-Ying Luk
Dehydration And Resistance Exercise Increased Muscle And Immune Cell Oxidative Stress In Trained Men, Casey R. Appell, Nigel C. Jiwan, Yasuki Sekiguchi, Danielle E. Levitt, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
Dehydration induced osmotic stress and resistance exercise (RE) independently increase reactive oxygen species (ROS) could lead to cellular stress in skeletal muscle (SkM) and peripheral blood mononuclear cells (PBMCs). The proper cellular function of SkM and PBMCs is critical to SkM recovery upon damage. Moreover, increased circulatory ROS can stress vascular endothelium, impacting nutrient delivery to tissues. PURPOSE: To examine the combination of dehydration and single RE bout-induced [H2O2] in SkM, PBMCs, and in circulation in RE-trained men. METHODS: RE-trained men (n=11, 21±1yr, height: 175.9±6.2cm, body weight: 79.2±12.3kg, 18.4±6.7%fat) completed two identical RE bouts either …
The Effects Of Hydration Status On Heart Rate Variability Following Supramaximal Intensity Exercise, Ryan A. Dunn, Nigel C. Jiwan, Casey R. Appell, Andrew Schindel, Ryan Ellis, Jayln Dunlap, Christopher Washington, Isabell R. Trevino, Carson Lewis, Ruben E. Moya, Jan-Joseph S. Rolloque, Marcos S. Keefe, Hui-Ying Luk, Yasuki Sekiguchi
The Effects Of Hydration Status On Heart Rate Variability Following Supramaximal Intensity Exercise, Ryan A. Dunn, Nigel C. Jiwan, Casey R. Appell, Andrew Schindel, Ryan Ellis, Jayln Dunlap, Christopher Washington, Isabell R. Trevino, Carson Lewis, Ruben E. Moya, Jan-Joseph S. Rolloque, Marcos S. Keefe, Hui-Ying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
Heart rate variability (HRV) is a non-invasive method used to monitor physiological stress via assessment of sympathetic and parasympathetic regulations and can indicate an individual’s recovery and readiness to exercise. Evidence suggests dehydration negatively impacts HRV; however, the influence of hydration status on HRV following supramaximal resistance exercise (RE) is unknown. PURPOSE: To investigate the effect of hydration status on HRV indices following supramaximal intensity RE. METHODS: 14 recreationally resistance-trained men (age, 21 ± 2 years; height, 176.25 ± 5.84 cm; weight, 81.31 ± 12.77 kg) participated in this study. In a randomized, counterbalanced order, participants performed a supramaximal intensity …
Optimal Ranges Of Training Load And Recovery Status Prior To The Game To Maximize Game-Day Performance In Soccer, Cherish Keeney, Kelly B. Elliott, Jan-Joseph S. Rolloque, Ruben Moya, Kathryn E. Southall, Kealey J. Wohlgemuth, Jacob A. Mota, Yasuki Sekiguchi
Optimal Ranges Of Training Load And Recovery Status Prior To The Game To Maximize Game-Day Performance In Soccer, Cherish Keeney, Kelly B. Elliott, Jan-Joseph S. Rolloque, Ruben Moya, Kathryn E. Southall, Kealey J. Wohlgemuth, Jacob A. Mota, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
Identifying ideal ranges of training load (TL) and recovery status before soccer games is essential to maximize game-day performance. PURPOSE: To determine how accumulative TL and subjective fatigue affect performance during the game. METHODS: Twenty-one male semi-professional soccer players (mean ± standard deviation; age: 22 ± 2 years; mass: 77.3 ± 6.9 kg) wore a player tracking device to monitor TL during each practice and game. A 7-day accumulation of high speed running and sprinting (HSR+Sprint, ³12.30 mph), total distance (TD), low acceleration (LowACC: 0.50-1.99 m×s-2), and high acceleration (HighACC: 2.00-50.00 m×s …
Firefighters Versus Law Enforcement Officers: A Comparison Of Cardiovascular Disease Risk, Bethany C. Guerra, Hunter Martaindale, Steven E. Martin, Lisa C. Colvin, Drew E. Gonzalez, Matthew J. Mcallister
Firefighters Versus Law Enforcement Officers: A Comparison Of Cardiovascular Disease Risk, Bethany C. Guerra, Hunter Martaindale, Steven E. Martin, Lisa C. Colvin, Drew E. Gonzalez, Matthew J. Mcallister
International Journal of Exercise Science: Conference Proceedings
Firefighters (FF) and law enforcement officers (LEO) have heightened cardiovascular disease (CVD) risk due to the stressful nature of their occupations. Data suggest that 45% of on-duty FF fatalities are related to CVD, while LEO have a 1.7 times higher CVD prevalence compared to the general public. To our knowledge, studies comparing FF to LEO, in terms of CVD risk factors, have not been published. This information is necessary to better understand differences in occupational disease risk, as well as to help bridge the gap between stress and CVD markers. PURPOSE: To compare CVD risk biomarkers, fitness, and body …
Validation Of A Non-Invasive Physiological Stress Assessment: Agreement Of Salivary And Blood Cortisol Among Firefighters, Caiti Dodge, Hunter Martaindale, Steven E. Martin, Lisa C. Colvin, Drew E. Gonzalez, Matthew J. Mcallister
Validation Of A Non-Invasive Physiological Stress Assessment: Agreement Of Salivary And Blood Cortisol Among Firefighters, Caiti Dodge, Hunter Martaindale, Steven E. Martin, Lisa C. Colvin, Drew E. Gonzalez, Matthew J. Mcallister
International Journal of Exercise Science: Conference Proceedings
Salivary cortisol has been used as an indicator of stress exposure among tactical personnel (i.e., firefighters). Assessing cortisol concentrations, whether via blood or saliva samples, can provide valuable insight into the physiological stress load placed upon the firefighter. Cortisol levels provide a reflection of the hypothalamic-pituitary-adrenal (HPA) axis activity. Salivary cortisol is unbound and has been suggested to provide a better reflection of HPA axis activity compared to blood cortisol, which is bound to soluble corticosteroid-binding globulin. Importantly, the use of salivary biosample collection also offers a more practical and non-invasive method to assess physiological stress biomarkers when blood sample …
Relationship Between Body Fat Distribution And Cardiovascular Disease Risk Biomarkers Among Firefighters, Macilynn E. Coles, M. Hunter Martaindale, Steven E. Martin, Lisa C. Colvin, Drew E. Gonzalez, Matthew J. Mcallister
Relationship Between Body Fat Distribution And Cardiovascular Disease Risk Biomarkers Among Firefighters, Macilynn E. Coles, M. Hunter Martaindale, Steven E. Martin, Lisa C. Colvin, Drew E. Gonzalez, Matthew J. Mcallister
International Journal of Exercise Science: Conference Proceedings
Firefighters are at risk of premature mortality due to cardiovascular disease (CVD). Firefighting is linked to elevations in oxidative stress, inflammation, and stress biomarkers, which all play a role in the development and progression of CVD. High prevalence rates of overweight and obesity have been found among U.S. firefighters. Obesity is considered a CVD risk factor, and firefighters who are classified as overweight or obese have been shown to express lower levels of high-density lipoprotein cholesterol (HDL-C) and higher levels of total cholesterol (TC), low-density lipoprotein cholesterol (LDL-C), triglycerides (TG), and biomarkers of oxidative stress and inflammation. However, little is …
Body Composition And Anthropometric Changes During A 10-Week Training Academy In Police Recruits, Christian D. Lavalle, Christian Rodriguez, Ethan Tinoco, Madelin R. Siedler, Christine M. Florez, Kealey J. Wohlgemuth, Carina M. Velasquez, Kathryn E. Southall, Mckenzie M. Hare, Jacob A. Mota, Grant M. Tinsley
Body Composition And Anthropometric Changes During A 10-Week Training Academy In Police Recruits, Christian D. Lavalle, Christian Rodriguez, Ethan Tinoco, Madelin R. Siedler, Christine M. Florez, Kealey J. Wohlgemuth, Carina M. Velasquez, Kathryn E. Southall, Mckenzie M. Hare, Jacob A. Mota, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Obesity and cardiometabolic risk factors are often present in law enforcement personnel, which may compromise physical readiness and long-term health. As such, physical fitness interventions are warranted for promoting officers' performance and wellbeing. PURPOSE: To determine the body composition and anthropometric changes experienced by police recruits undergoing a departmental training academy. METHODS: Twenty-one police recruits (20 M, 1 F; age: 25.1 ± 5.0 y; BMI: 27.8 ± 4.3 kg/m2) were tested before and after a 10-week training academy in Lubbock, Texas. Supervised physical training was conducted 5 times per week and consisted of ~1–1.5 hours of …
Comparing The Validity Of Five Different Resting Metabolic Rate Prediction Equations In Active Women, Madelin R. Siedler, Christian Rodriguez, Christine M. Florez, Christian Lavalle, Ethan Tinoco, Alexandra Brojanac, Jaylynn Rasco, Grant M. Tinsley
Comparing The Validity Of Five Different Resting Metabolic Rate Prediction Equations In Active Women, Madelin R. Siedler, Christian Rodriguez, Christine M. Florez, Christian Lavalle, Ethan Tinoco, Alexandra Brojanac, Jaylynn Rasco, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Resting metabolic rate (RMR) prediction equations are often used in settings where the measurement of RMR through indirect calorimetry (IC) may not be feasible. However, commonly used equations developed in less active populations may not accurately predict RMR in active individuals who have a higher proportion of lean tissue. PURPOSE: The purpose of this study was to determine the validity of RMR prediction equations by Harris & Benedict (1918), Cunningham (1980 and 1991), DeLorenzo (1999), and ten Haaf & Weijs (2014) against a criterion model (IC) in a population of active women. METHODS: Forty-one generally healthy women were …
Body Fat Percentage Estimation From Smartphone Three-Dimensional Optical Imaging, Christine M. Florez, Christian Rodriguez, Madelin R. Siedler, Ethan Tinoco, Grant M. Tinsley
Body Fat Percentage Estimation From Smartphone Three-Dimensional Optical Imaging, Christine M. Florez, Christian Rodriguez, Madelin R. Siedler, Ethan Tinoco, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Body composition is an important component of overall health. The development of digital assessment methods has led to increased interest in devices that allow users to monitor their own body composition. Smartphone applications with three-dimensional optical imaging (3DO) capabilities are a user-friendly technology capable of predicting percent body fat (BF%) from relevant body measurements. PURPOSE: To determine the validity of two BF% equations using smartphone 3DO data, as compared to a 4-compartment (4C) model criterion, and to produce a new BF% estimation equation. METHODS: At a single laboratory visit, 60 participants (28 F, 32 M; [mean ± SD] …
The Effect Of Morning Thirst On Afternoon Hydration Status, Kelly B. Elliott, Marcos Keefe, Jan-Joseph S. Rolloque, Nigel Jiwan, Hui-Ying Luk, Yasuki Sekiguchi
The Effect Of Morning Thirst On Afternoon Hydration Status, Kelly B. Elliott, Marcos Keefe, Jan-Joseph S. Rolloque, Nigel Jiwan, Hui-Ying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
Thirst sensation is an important stimulus for drinking behavior; however, the effect of thirst sensation on later hydration status remains unclear. PURPOSE: To investigate the effects of morning thirst on afternoon hydration status. METHODS: Twelve men (mean ± standard deviation; age: 21 ± 2 years; mass: 81.0 ± 15.9 kg) and twelve women (age: 22 ± 3 years; mass: 68.8 ± 15.2 kg) visited the laboratory in the morning (first morning) and afternoon (2:00-4:00pm) for three consecutive days under a free-living condition. At each visit, participants provided a urine sample where urine indices were analyzed (urine specific gravity [USG], urine …
Technical And Biological Error Of Skeletal Muscle Mass Estimation From Dual-Energy X-Ray Absorptiometry, Christian Rodriguez, Madelin R. Siedler, Christine M. Florez, Grant M. Tinsley
Technical And Biological Error Of Skeletal Muscle Mass Estimation From Dual-Energy X-Ray Absorptiometry, Christian Rodriguez, Madelin R. Siedler, Christine M. Florez, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
The increasing prevalence of conditions like sarcopenia, sarcopenic obesity, frailty, and cachexia emphasizes the need for reliable methods to estimate skeletal muscle mass (SMM). Data obtained from dual-energy X-ray absorptiometry (DXA) can be used within prediction equations to estimate whole-body SMM. However, limited data are available to inform the reliability of SMM estimates from prediction equations. PURPOSE: The purpose of this study was to determine the technical and biological error of SMM estimation across two DXA devices. METHODS: A sample of 18 generally healthy adults (11 F, 7 M; [mean ± SD] age 24.4 ± 8.7 y, body mass index …
Sleep Duration Is Increased Following Muscle Damaging Exercise In Hot Environmental Conditions, Marcos Keefe, Ryan A. Dunn, Casey R. Appell, Nigel C. Jiwan, Jan-Joseph S. Rolloque, Hui-Ying Luk, Yasuki Sekiguchi
Sleep Duration Is Increased Following Muscle Damaging Exercise In Hot Environmental Conditions, Marcos Keefe, Ryan A. Dunn, Casey R. Appell, Nigel C. Jiwan, Jan-Joseph S. Rolloque, Hui-Ying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
Sleep and recovery measures are typically negatively affected by a muscle-damaging bout of exercise. However, it remains unknown if the additive effects of hot environmental conditions, resulting in increased core temperature and other thermoregulatory responses during the exercise bout, further progress changes in quantity and performance quality of sleep duration. PURPOSE: To investigate the effect of muscle-damaging exercise in the heat, compared to a thermoneutral condition, on sleep and recovery measures. METHODS: Ten healthy males (age: 23 ± 3yr; body mass: 78.7 ± 11.5kg; height: 176.9 ± 5cm; lactate threshold [LT]: 9.7 ± 1.0km.hr-1) performed two …
Influence Of The International Journal Of Exercise Science, Duane V. Knudson, Gracie K. Burson
Influence Of The International Journal Of Exercise Science, Duane V. Knudson, Gracie K. Burson
International Journal of Exercise Science
International Journal of Exercise Science 17(2): 265-273, 2024. The International Journal of Exercise Science (IJES) publishes research from numerous subdisciplines of exercise science and health. This study documented the scholarly influence of the initial 15-year history (2008-2022) of the IJES. Publication, indexing, from the IJES website and four database services: Dimensions, Google Scholar (GS), PubMed, and SCImago Journal & Rank. The IJES has published 1055 articles in 79 issues in the first 15 years. The top 106 (10%) cited articles received a total of 7,195 citations according to GS. Top-cited IJES articles …