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Articles 151 - 180 of 262
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Cardiovascular Adaptations Induced By Heat Acclimation/Acclimatization In Endurance Trained Athletes, Ganesh Chetan Tallam, Yasuki Sekiguchi, Ryan Dunn
Cardiovascular Adaptations Induced By Heat Acclimation/Acclimatization In Endurance Trained Athletes, Ganesh Chetan Tallam, Yasuki Sekiguchi, Ryan Dunn
International Journal of Exercise Science: Conference Proceedings
Heat acclimation/acclimatization (HA) is the improvement in heat tolerance that comes from gradually increasing intensity or duration of work in a hot background. HA reduces heat-mediates performance decrements while providing protection against exertional heat illness. PURPOSE: To assess and quantify the magnitude of cardiovascular adaptations induced by heat acclimation/acclimatization in endurance trained athletes. METHODS: A literature search was conducted using PubMed, SPORTDiscus, Scopus, and Cochrane- Library, with data from 23 studies being chosen for analysis. Subgroup analysis determined the differences in cardiovascular adaptations between short (≤7days; MTHA), medium (8-13 days; MTHA), and long-term HA (≥14 days; LTHA). RESULTS …
The Effect Of Dehydration And High-Volume Resistance Exercise On Intracellular And Local Muscular Fluid Shifts - A Pilot Study, Carson Lewis, Nigel Jiwan, Casey Appell, Isabell R. Trevino, Ryanoneil Ellis, Raoul Sterling, Jan-Joseph S. Rolloque, Alan T. Ky, Marcos Keefe, Ryan Dunn, Yasuki Sekiguchi, Hui-Ying Luk
The Effect Of Dehydration And High-Volume Resistance Exercise On Intracellular And Local Muscular Fluid Shifts - A Pilot Study, Carson Lewis, Nigel Jiwan, Casey Appell, Isabell R. Trevino, Ryanoneil Ellis, Raoul Sterling, Jan-Joseph S. Rolloque, Alan T. Ky, Marcos Keefe, Ryan Dunn, Yasuki Sekiguchi, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
Hypertonic hypovolemia (dehydration) could disrupt the balance between extracellular water (ECW) and intracellular water (ICW). Notably, high-volume resistance exercise (RE) accumulates metabolites resulting in acute muscle swelling (increased ICF). However, the impact of hypertonic hypovolemia state on ECW and ICW distribution after RE is not known. PURPOSE: To determine the effect of acute dehydration on fluid balance after RE. METHODS: 7 resistance-trained males completed two identical high-volume RE, separated by two weeks (bilateral leg press and knee extensions exercises [5 sets of 10 repetitions at 80% of 1 repetition maximum]) either in a euhydrated (EH; urine specific gravity [USG] …
Curcumin Mitigates Neuropathic-Induce Muscle Atrophy By Suppressing Camk2/Nf-Kb Pathway, Casey Appell, Nigel Jiwan, Chwan-Li Shen, Hui-Ying Luk
Curcumin Mitigates Neuropathic-Induce Muscle Atrophy By Suppressing Camk2/Nf-Kb Pathway, Casey Appell, Nigel Jiwan, Chwan-Li Shen, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
Neuropathy can induce inflammation that results in muscle atrophy. Curcumin has been shown to exert an anti-inflammatory effect, preserving muscle mass in diabetic rats. However, the mechanism of curcumin to preserve muscle mass in neuropathy is not known. PURPOSE: To examine the effect of curcumin on the intramuscular inflammation and muscle cross-sectional area (CSA) in a neuropathy rodent model. METHODS: Twelve rats were randomly assigned to three groups: sham (CON), spinal nerve ligation (SNL), and SNL+100curcumin/kg BW (100CUR). The right (R) lumbosacral section (i.e., L5/L6) of the spinal cord was ligated (SNL and 100CUR) or sham surgery (CON) was performed, …
Does The Analysis Of Separate Bands Of Echo Intensity Strengthen The Relationship To Muscle Function?, Kathryn Southall, Kealey J. Wohlgemuth, Mckenzie M. Hare, Jacob A. Mota
Does The Analysis Of Separate Bands Of Echo Intensity Strengthen The Relationship To Muscle Function?, Kathryn Southall, Kealey J. Wohlgemuth, Mckenzie M. Hare, Jacob A. Mota
International Journal of Exercise Science: Conference Proceedings
Ultrasound echo intensity (EI) has been proposed as a method of assessing muscle quality through the use of non-invasive imaging. Traditionally, EI is assessed as the mean pixel brightness that ranges from 0-255 within an area of interest. However, it may be reasonable to consider that additional portions of the ultrasound EI signal (i.e., bands of signal) may provide novel insight to muscle function. The determination of which band of signal may be more related to a given functional outcome may increase the sensitivity of EI. Thus far, there is no research analyzing the association between EI bands and fatigue. …
The Effect Of Body Composition Methodology On Resulting Energy Availability Assessments, Madelin R. Siedler, Christian Rodriguez, Matthew T. Stratton, Patrick S. Harty, Dale Keith, Jacob Green, Jake Boykin, Sarah White, Abegale D. Williams, Gabrielle Dehaven, Grant M. Tinsley
The Effect Of Body Composition Methodology On Resulting Energy Availability Assessments, Madelin R. Siedler, Christian Rodriguez, Matthew T. Stratton, Patrick S. Harty, Dale Keith, Jacob Green, Jake Boykin, Sarah White, Abegale D. Williams, Gabrielle Dehaven, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Energy availability (EA) is defined as the total daily energy available to an individual after accounting for that expended during exercise and standardized to fat-free mass (FFM). Generally, EA values less than 30 kcal/kg FFM/day are considered “low” and have been associated with deleterious effects on reproductive and hormonal health in females. However, it is unclear whether the method used to estimate FFM influences the resulting EA values to a degree that may affect interpretation and clinical decision-making. PURPOSE: To determine the effect of FFM values derived from various methods of body composition assessment on the resulting range and interpretation …
Reliability Of Differing Muscle Size And Quality Analysis Techniques, Mckenzie M. Hare, Kealey J. Wohlgemuth, Malia N.M. Blue, Jacob A. Mota
Reliability Of Differing Muscle Size And Quality Analysis Techniques, Mckenzie M. Hare, Kealey J. Wohlgemuth, Malia N.M. Blue, Jacob A. Mota
International Journal of Exercise Science: Conference Proceedings
Brightness-mode (B-mode) ultrasonography is a popular tool to examine anatomical cross-sectional area (ACSA) and echo intensity (EI). Muscle ACSA and EI provide valuable insight into muscle function due to their unique mechanisms which influence performance. Manually analyzing ultrasound images potentially increases variability which may increase error, thus decreasing the reliability of manual image analysis. Recently an automated program was created to improve reliability and reduce the time of ultrasound image analysis. PURPOSE: The purpose of this study was to investigate the reliability of manual compared to automatic ultrasound analyses of muscle cross-sectional area and echo intensity. METHODS: Twenty-two …
Sex Differences In The Accuracy Of Wut (Weight, Urine Color, Thirst) Diagrams Assessing Hydration Status, Jan-Joseph Rolloque, Marcos Keefe, Nigel Jiwan, Casey Appell, Madison Pomroy, Huiying Luk, Yasuki Sekiguchi
Sex Differences In The Accuracy Of Wut (Weight, Urine Color, Thirst) Diagrams Assessing Hydration Status, Jan-Joseph Rolloque, Marcos Keefe, Nigel Jiwan, Casey Appell, Madison Pomroy, Huiying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
The WUT (Weight, Urine Color, Thirst) Venn diagram is a practical method to assess hydration status using percent body mass loss (%BML), urine color (UCOL), and thirst perception (TP). However, sex differences and the accuracy of WUT diagrams between males and females has not yet been investigated. PURPOSE: To observe sex differences in the accuracy of WUT diagrams assessing hydration status. METHODS: 8 males [M] (age: 21 ± 3; mass: 76.3 ± 15.6 kg) and 5 females [F] (age: 22 ± 2; mass: 60.5 ± 13.6) visited the laboratory twice a day (morning (7:00am-9:00am) and afternoon …
Impact Of Habitual Water Intake On Muscle Quality And Total Body Water-A Pilot Study, Kelly B. Elliott, Alan T. Ky, Casey Appell, Ryan Dunn, Nigel Jiwan, Cherish Dunlap, Ganesh C. Tallam, Hui-Ying Luk, Yasuki Sekiguchi
Impact Of Habitual Water Intake On Muscle Quality And Total Body Water-A Pilot Study, Kelly B. Elliott, Alan T. Ky, Casey Appell, Ryan Dunn, Nigel Jiwan, Cherish Dunlap, Ganesh C. Tallam, Hui-Ying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
Proper hydration is essential for critical health and performance functions, such as muscle function and body fluid balance. The effect of acute hydration status has been studied on health and muscle performance; however, the effect of habitual water intake on muscle quality and total body water between high and low consumption has not been examined. PURPOSE: To determine the impact of habitual water intake on muscle quality and total body water. METHODS: Eleven women (age: 27.6±7.9 years; mass: 60.3±10.8 kg) provided a five-day dietary food log to categorize them into HIGH or LOW daily total water intake (TWI). …
Agreement Between Body Mass Index And Percent Body Fat In Resistance Trained Men And Women, Christine Harrison, Grant Tinsley, Ariane Hollub Secrest, Colin Wilborn, Lem Taylor
Agreement Between Body Mass Index And Percent Body Fat In Resistance Trained Men And Women, Christine Harrison, Grant Tinsley, Ariane Hollub Secrest, Colin Wilborn, Lem Taylor
International Journal of Exercise Science: Conference Proceedings
National health organizations report on the prevalence of obesity utilizing statistics based upon Body Mass Index (BMI), a noninvasive, anthropometric measurement used for weight classification. Though the limitations of the BMI formula are well known, it is still commonly used in clinical settings due to the ease of calculation using only weight and height (kg/m2). Dual-Energy X-Ray Absorptiometry (DXA) is a criterion method for body composition estimation. PURPOSE: The purpose of this analysis was to assess the agreement between BMI classification and measured percent body fat (PBF) via DXA in a resistance-trained (RT) population. METHODS: DXA …
Age-Related Differences In Handgrip Strength Characteristics And Vertical Jump Performance, Kayla P. Sisneros, Pratibha S. Maurya, Evan Johnson, Ty B. Palmer
Age-Related Differences In Handgrip Strength Characteristics And Vertical Jump Performance, Kayla P. Sisneros, Pratibha S. Maurya, Evan Johnson, Ty B. Palmer
International Journal of Exercise Science: Conference Proceedings
Handgrip strength characteristics, such as peak force and rate of force development (RFD), have been shown to be significantly associated with the performance capacities of the lower-body musculature. Declines in lower-body performance are commonly reported as a consequence of aging. However, few studies have investigated the influence of age on handgrip peak force and RFD. PURPOSE: The purpose of this study was to examine age-related differences in handgrip peak force and RFD between young and older women and the relationships of these characteristics with lower-body performance during a vertical jump (VJ) test. METHODS: Twenty young (age = 21 ± 3 …
Handgrip Peak Force And Rate Of Force Development Measurements: Are They Reliable And Do They Correlate With Vertical Jump Power?, Pratibha S. Maurya, Kayla P. Sisneros, Evan Johnson, Ty B. Palmer
Handgrip Peak Force And Rate Of Force Development Measurements: Are They Reliable And Do They Correlate With Vertical Jump Power?, Pratibha S. Maurya, Kayla P. Sisneros, Evan Johnson, Ty B. Palmer
International Journal of Exercise Science: Conference Proceedings
Handgrip peak force and rate of force development (RFD) measurements have been shown to be effective parameters at characterizing the strength capacities of numerous muscle groups, including those of the lower extremities. However, the reliability of these measurements and their relationship with vertical jump (VJ) peak power remains uncertain. PURPOSE: The purpose of this study was to examine the reliability of handgrip peak force and RFD measurements. A secondary aim was to determine if these measurements are correlated with the peak power produced during a VJ test. METHODS: Twenty young, healthy women (age = 21 ± 3 years) …
Comparison Of Walking Mechanics Between Manual And Automated Iv Poles, Katie N. Harris, John Krzyszkowski, Luke Chowning, James Yang, Lamidi Kolawole, Debajyoti Pati, Seyedehnastaran Hashemi, John R. Harry
Comparison Of Walking Mechanics Between Manual And Automated Iv Poles, Katie N. Harris, John Krzyszkowski, Luke Chowning, James Yang, Lamidi Kolawole, Debajyoti Pati, Seyedehnastaran Hashemi, John R. Harry
International Journal of Exercise Science: Conference Proceedings
Many older adults fall while admitted in the hospital. The increased incidence of hospital falls is associated with intravenous (IV) pole manipulation when maneuvering through the room. PURPOSE: To determine whether an automated IV pole can decrease fall risk in older adults. METHODS: Twelve healthy older adults (> 65 years) performed three walking trials for each of three walking conditions (normal walking [no IV pole], walking with a manual IV pole, and walking with an automated IV pole [robot]). Each walking trial consisted of three phases: walking up to a door (entry), opening the door (door), and walking …
The Effect Of Geranylgeraniol On Satellite Cells Myogenic State In Type 2 Diabetic Rats, Nigel C. Jiwan, Casey R. Appell, Raoul Sterling, Chwan-Li Shen, Hui-Ying Luk
The Effect Of Geranylgeraniol On Satellite Cells Myogenic State In Type 2 Diabetic Rats, Nigel C. Jiwan, Casey R. Appell, Raoul Sterling, Chwan-Li Shen, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
Type 2 Diabetes (T2D) is associated with chronic inflammation, which can contribute to impaired satellite cells (SC) myogenic state that may result in muscle atrophy. Geranylgeraniol (GGOH) has shown to prevent muscle atrophy, reduce inflammatory markers, and increase SC content; however, the effect of GGOH on SC myogenic state in T2D rats is not known. PURPOSE: To examine the effects of GGOH on SC myogenic state and muscle cross-sectional area (CSA) in T2D rats. METHODS: 21 Sprague-Dawley rats were fed a control diet (CON; n=7), a high-fat diet with 35 mg/kg of streptozotocin (HFD; n=7), and HFD with 800mg/kg …
Morning Versus Afternoon Body Mass In Free-Living Or Controlled Euhydration, Madi M. Pomroy, Marcos Keefe, Nigel Jiwan, Jan-Joseph S. Rolloque, Casey Appell, Courteney L. Benjamin, Hui-Ying Luk, Yasuki Sekiguchi
Morning Versus Afternoon Body Mass In Free-Living Or Controlled Euhydration, Madi M. Pomroy, Marcos Keefe, Nigel Jiwan, Jan-Joseph S. Rolloque, Casey Appell, Courteney L. Benjamin, Hui-Ying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
The standard protocol to assess hydration status is by measuring body mass in the early morning without controlling fluid intake. However, obtaining first-morning body mass is not necessarily feasible for many situations, for example, most physical activities take place in the afternoon. Thus, first-morning body mass might not be practical to assess hydration status. PURPOSE: To investigate first-morning body mass versus afternoon body mass in free- living and controlled euhydration. METHODS: 9 males (age: 21 ± 2; mass: 79.7 ± 17.8 kg) and 5 females (age: 22 ± 2; mass: 60.5 ± 13.6 kg) visited the laboratory in …
Bioimpedance Spectroscopy Compared To Ultrasound-Derived Measures Of Quadriceps Muscle Quality, Kealey J. Wohlgemuth, Todd J. Freeborn, Mckenzie M. Hare, Kathryn E. Southall, Jacob A. Mota
Bioimpedance Spectroscopy Compared To Ultrasound-Derived Measures Of Quadriceps Muscle Quality, Kealey J. Wohlgemuth, Todd J. Freeborn, Mckenzie M. Hare, Kathryn E. Southall, Jacob A. Mota
International Journal of Exercise Science: Conference Proceedings
Muscle quality is often measured using ultrasound-derived echo intensity (EI). Recent works have shown tissue frequency-dependent electrical impedance from bioimpedance spectroscopy may be a modality for assessing tissue quality. PURPOSE: The purpose of the project was to examine the association between ultrasound-derived EI of the quadriceps muscles (i.e., vastus lateralis [VL], vastus medialis [VM], vastus intermedius [VI], rectus femoris [RF]) and measures of thigh tissue frequency-dependent electrical impedance (i.e., R0, R1, C, a, fp). METHODS: Twenty-four participants (13 women; mean ± SD; age: 22 ± 4 years; BMI: 25.47 ± 3.26 kg/m2) were recruited. Participants completed …
The Effect Of Hydration On Readiness And Recovery Before And After Resistance Exercise- A Pilot Study, Cherish A. Dunlap, Nigel Jiwan, Casey Appell, Ryanoneil Ellis, Isabell R. Trevino, Carson Lewis, Raoul Sterling, Marcos Keefe, Ryan Dunn, Alan T. Ky, Jan-Joseph S. Rolloque, Kelly B. Elliot, Hui-Ying Luk, Yasuki Sekiguchi
The Effect Of Hydration On Readiness And Recovery Before And After Resistance Exercise- A Pilot Study, Cherish A. Dunlap, Nigel Jiwan, Casey Appell, Ryanoneil Ellis, Isabell R. Trevino, Carson Lewis, Raoul Sterling, Marcos Keefe, Ryan Dunn, Alan T. Ky, Jan-Joseph S. Rolloque, Kelly B. Elliot, Hui-Ying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
Dehydration can disturb sleep which is essential for the readiness and recovery process. However, the role of hydration on readiness and recovery indicated by low resting heart rate (RHR) and high heart rate variability (HRV) before and after resistance exercise (RE) is not known. PURPOSE: The purpose of this study was to examine the effect of hydration status on readiness and recovery before and after RE. METHODS: Seven resistance-trained men (age: 21±1 years; weight: 77.8±11.0 kg; height: 177.4±5.3 cm) performed a series of RE that included bilateral leg press and knee extensions (5 sets of 10 repetitions at …
The Effect Of Hydration Status On Sleep Quality: A Pilot Study, Ryanoneil T. Ellis, Nigel C. Jiwan, Isabell R. Trevino, Casey R. Appell, Carson Lewis, Raoul Sterling, Alan T. Ky, Jan-Joseph S. Rolloque, Marcos S. Keefe, Ryan A. Dunn, Yasuki Sekiguchi, Hui-Ying Luk
The Effect Of Hydration Status On Sleep Quality: A Pilot Study, Ryanoneil T. Ellis, Nigel C. Jiwan, Isabell R. Trevino, Casey R. Appell, Carson Lewis, Raoul Sterling, Alan T. Ky, Jan-Joseph S. Rolloque, Marcos S. Keefe, Ryan A. Dunn, Yasuki Sekiguchi, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
Sleep improves muscle recovery and cognitive health and can be impaired by physiological and mental stress. Dehydration can induce stress which leads to sleep impairment and thus could affect the readiness for and recovery from exercise. However, no study has examined the effect of hydration on sleep before and after resistance exercise (RE). PURPOSE: To examine the effect of hydration status on sleep before and after RE. METHODS: 7 resistance-trained men completed two identical RE consisting of bilateral leg press and knee extensions (5 sets of 10 repetitions at 80% of 1 repetition maximum) in a euhydrated state …
Gendered Dietary Supplements: Does The Marketing Reflect Different Formulations?, Alexandra P. Brojanac, Grant M. Tinsley, Madelin R. Siedler
Gendered Dietary Supplements: Does The Marketing Reflect Different Formulations?, Alexandra P. Brojanac, Grant M. Tinsley, Madelin R. Siedler
International Journal of Exercise Science: Conference Proceedings
Many dietary supplements are marketed with gendered terms, such as “for her” and “for him.” However, whether these statements reflect different nutrient contents of products and a biological basis has not been systematically examined. PURPOSE: The purpose of this analysis was to compare the micronutrient content of dietary supplements that are sold in separate forms based on gendered marketing. METHODS: The National Institutes of Health Dietary Supplements Label Database (DSLD) was searched using gendered terms, such as “hers,” “her,” “women,” “his,” “him,” and “men.” Eighty-nine pairs of micronutrient-containing products that were commercially available as a women’s version and a men’s …
Skeletal Muscle Desaturation During Moderate And Severe Intensity Cycling Exercise Is Related To Half-Time From The Reactive Hyperemia Response, Jacob R. Dellinger, Joaquin Gonzales
Skeletal Muscle Desaturation During Moderate And Severe Intensity Cycling Exercise Is Related To Half-Time From The Reactive Hyperemia Response, Jacob R. Dellinger, Joaquin Gonzales
International Journal of Exercise Science: Conference Proceedings
Reactive hyperemia responses are a common method for assessing peripheral microvascular function, and the half-time reperfusion response, in particular, has been shown to be highly reproducible and sensitive to vascular dysfunction associated with disease. It is unclear, however, whether this parameter also provides information about microvascular responses during exercise. PURPOSE: The aim of this study was to determine the relationship between reactive hyperemia half-time response and the change in skeletal muscle oxygenation during cycling exercise. METHODS: Thirty young adults (20 men, 10 women; Age: 23 ± 5 y; peak VO2: 35.4 ± 4.4 ml/kg/min) completed a …
The Effects Of Heat Acclimatization, Heat Acclimation, And Intermittent Heat Training On Maximal Oxygen Uptake, Ryan A. Dunn, Lauren A. Fry, Yasuki Sekiguchi, Courteney L. Benjamin, Ciara N. Manning, Robert A. Huggins, Rebecca L. Stearns, Douglas J. Casa
The Effects Of Heat Acclimatization, Heat Acclimation, And Intermittent Heat Training On Maximal Oxygen Uptake, Ryan A. Dunn, Lauren A. Fry, Yasuki Sekiguchi, Courteney L. Benjamin, Ciara N. Manning, Robert A. Huggins, Rebecca L. Stearns, Douglas J. Casa
International Journal of Exercise Science: Conference Proceedings
Maximal oxygen uptake (VO2max) is an important determinant of endurance performance. Heat acclimation/acclimatization (HA/HAz) strategies elicit improvements in endurance performance. When heat exposure is reduced, intermittent heat training (IHT) is potentially beneficial to alleviate HA/HAz adaptation decay, however corresponding VO2max responses are unknown. PURPOSE: To determine the effects of HA/HAz and IHT on VO2max in endurance runners and identify how long VO2max adaptations remain following removal of repeated heat exposure. METHODS: Twenty-seven male endurance runners (mean ± SD; age, 36 ± 12 years; body mass, 73.03 ± 8.97 kg; height, 178.81 ± 6.39 cm; VO …
Alpha-Cyclodextrin-Containing Beverages For Hydration Enhancement In Humans, Ethan G. Tinoco, Madelin Siedler, Christian Rodriguez, Sarah White, Gabrielle Dehaven, Alexandra Brojanac, Patrick Harty, Matthew Stratton, Jacob Green, Jake Boykin, Abegale Williams, Grant M. Tinsley, Dale Keith
Alpha-Cyclodextrin-Containing Beverages For Hydration Enhancement In Humans, Ethan G. Tinoco, Madelin Siedler, Christian Rodriguez, Sarah White, Gabrielle Dehaven, Alexandra Brojanac, Patrick Harty, Matthew Stratton, Jacob Green, Jake Boykin, Abegale Williams, Grant M. Tinsley, Dale Keith
International Journal of Exercise Science: Conference Proceedings
A substantial portion of the world’s population may be inadequately hydrated, and dehydration is associated with several disease states and acute impairments in exercise performance. As such, there is continued interest in novel strategies to promote adequate hydration. The carbohydrate alpha-cyclodextrin has recently been shown to enhance water uptake through human aquaporins expressed in a single-cell model and promote longevity in model multicellular organisms. However, there is no relevant human research examining the potential hydrating effects of alpha-cyclodextrin-containing beverages. PURPOSE: To determine if novel beverage formulations containing alpha-cyclodextrin improve a bioimpedance-based hydration marker in humans. METHODS: In a …
Body Fat Percentage And Hormonal Intrauterine Device Use Are Independently Associated With Self-Reported Menstrual Regularity In Young Adult Females, Gabrielle Dehaven, Madelin R. Siedler, Christian Rodriguez, Sarah White, Alex Brojanac, Ethan Tinoco, Grant M. Tinsley
Body Fat Percentage And Hormonal Intrauterine Device Use Are Independently Associated With Self-Reported Menstrual Regularity In Young Adult Females, Gabrielle Dehaven, Madelin R. Siedler, Christian Rodriguez, Sarah White, Alex Brojanac, Ethan Tinoco, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Menstrual regularity is a key indicator of energy availability, long-term bone density, and other important health information in females. The occurrence of a regular menstrual cycle indicates that an individual’s level of estrogen is supportive of strong bones and that they are achieving the caloric intake required to support their activity level. In contrast, an irregular menstrual cycle can be indicative of insufficient energy availability which may, over time, result in low bone mineral density and thus a higher risk of bone stress injuries. However, hormonal contraceptive use, including the rising use of intrauterine devices (IUDs), may mask these changes …
Relationships Between Morning And Afternoon Wut (Weight, Urine Color, And Thirst) Criteria And Hydration Markers, Marcos S. Keefe, Jan-Joseph S. Rolloque, Nigel C. Jiwan, Casey R. Appell, Tyler Mccollum, Hui-Ying Luk, Yasuki Sekiguchi
Relationships Between Morning And Afternoon Wut (Weight, Urine Color, And Thirst) Criteria And Hydration Markers, Marcos S. Keefe, Jan-Joseph S. Rolloque, Nigel C. Jiwan, Casey R. Appell, Tyler Mccollum, Hui-Ying Luk, Yasuki Sekiguchi
International Journal of Exercise Science: Conference Proceedings
A Venn diagram decision tool consisting of weight, urine color, and thirst (WUT) is suggested to measure hydration status. The WUT Venn diagram has been used as a practical hydration status assessment tool; however, this relationship has only been investigated using a first-morning urine sample. PURPOSE: To investigate relationships between morning and afternoon WUT criteria, blood and urine markers. METHODS: Eight men (age: 21 ± 3; mass: 76.3 ± 15.6 kg) and five women (age: 22 ± 2; mass: 60.5 ± 13.6 kg) completed the study. Body mass, urine color, urine specific gravity (USG), urine osmolality (UOSM …
Reliability And Relationships Between Supine Medicine Ball Throw Kinetics And Vertical Jump Height, Evan B. Johnson, Pratibha S. Maurya, Kayla P. Sisneros, Ty B. Palmer
Reliability And Relationships Between Supine Medicine Ball Throw Kinetics And Vertical Jump Height, Evan B. Johnson, Pratibha S. Maurya, Kayla P. Sisneros, Ty B. Palmer
International Journal of Exercise Science: Conference Proceedings
Supine medicine ball throw (SMBT) assessments have been used previously to evaluate upper-body explosive strength in young adults. Kinetic variables, such as peak force and rate of force development (RFD), can be measured during a SMBT. These variables have been suggested to be important predictors of athletic performance capacities. However, limited data exist regarding the reliability of SMBT peak force and RFD measurements and how they associate with performance during a vertical jump (VJ) test. PURPOSE: The purpose of this study was to examine the reliability of SMBT variables and their relationship with VJ height. METHODS: Twenty young, …
Physiological Stress Responses To A Live-Fire Training Evolution In Career Firefighters, Drew E. Gonzalez, Sarah E. Johnson, Courtney C. Dillard, Ryan J. Sowinski, Steven E. Martin, Lisa C. Colvin, Matthew J. Mcallister
Physiological Stress Responses To A Live-Fire Training Evolution In Career Firefighters, Drew E. Gonzalez, Sarah E. Johnson, Courtney C. Dillard, Ryan J. Sowinski, Steven E. Martin, Lisa C. Colvin, Matthew J. Mcallister
International Journal of Exercise Science: Conference Proceedings
Firefighters have a physically demanding job that exposes them to many specific and unique stressors, which contribute to cardiovascular disease (CVD) risk (i.e., cardiovascular strain, inflammation, and oxidative stress) or even mortality. At present, the literature lacks data evaluating these physiological stress responses amongst firefighters in any realistic or simulated scenarios, such as a live-fire training evolution (LFTE). Given the elevated risk of premature mortality, there is a critical need to better understand the physiological stress responses to an LFTE. This information could aid in developing nutritional, training, and other various interventions to mitigate stress load and reduce the incidence …
Differential Effects Of Oral Vs. Intravenous Fluid Administration On Bioelectrical Impedance During Dehydration Induced By Exercise And Heat, Sarah J. White, Alan T. Ky, Yasuki Sekiguchi, Grant M. Tinsley
Differential Effects Of Oral Vs. Intravenous Fluid Administration On Bioelectrical Impedance During Dehydration Induced By Exercise And Heat, Sarah J. White, Alan T. Ky, Yasuki Sekiguchi, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
There is continued debate regarding optimal evaluation of hydration. Bioimpedance analysis has been utilized to evaluate hydration status, but there is limited information regarding the ability of this technology to detect physiological changes occurring during acute dehydration. PURPOSE: To evaluate whether bioimpedance spectroscopy (BIS) detects changes in bioelectrical resistance (R) in response to dehydration induced by exercising in the heat, assess whether these changes are related to body mass changes, and determine if the route of fluid administration during the dehydration protocol influences these observations. METHODS: Twelve males (mean ± SD; age: 28.6 ± 12.4 y; body mass: …
Tracking Fat-Free Mass Changes Over A Competitive Season In Elite Soccer Players, Christian Rodriguez, Tindaro Bongiovanni, Mathieu Lacome Rigobert, Grant M. Tinsley
Tracking Fat-Free Mass Changes Over A Competitive Season In Elite Soccer Players, Christian Rodriguez, Tindaro Bongiovanni, Mathieu Lacome Rigobert, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
The assessment of body composition in athletes throughout a competitive season can provide valuable information for coaches and practitioners as part of a general health assessment and to track training adaptations across a season. However, limited data are available to inform the capacity of common methods to accurately track longitudinal body composition changes in elite athletes. PURPOSE: The purpose of this study was to determine the validity of common body composition techniques and their associated prediction equations to track fat-free mass (FFM) in elite soccer players over a competitive season. METHODS: A sample of 21 elite soccer players participated in …
The Effect Of Quercetin On Bone Turnover Markers, Inflammatory Markers, And Bone Mineral Density In Postmenopausal Women: A Double-Blind Placebo-Controlled Investigation, Alyssa R. Bailly, Garrett M. Hester, Robert J. Buresh, Michaela M. Alesi, Jeremy B. Ducharme, Christine M. Mermier, Trisha A. Vandusseldorp
The Effect Of Quercetin On Bone Turnover Markers, Inflammatory Markers, And Bone Mineral Density In Postmenopausal Women: A Double-Blind Placebo-Controlled Investigation, Alyssa R. Bailly, Garrett M. Hester, Robert J. Buresh, Michaela M. Alesi, Jeremy B. Ducharme, Christine M. Mermier, Trisha A. Vandusseldorp
International Journal of Exercise Science: Conference Proceedings
Maintaining optimal bone health prevents major bone disorders (e.g., osteoporosis) and prolongs longevity. Quercetin is a plant-based flavonoid that is suggested to have anti-inflammatory effects and may improve bone health. PURPOSE: To investigate the effects of quercetin supplementation over 90-days on prominent bone turnover markers (BTMs), inflammatory markers, bone mineral density (BMD), body composition, and physical functioning in postmenopausal women. METHODS: Thirty-three healthy, nonosteoporotic, postmenopausal women (59.2±7.0 years) participated in a double-blind, placebo-controlled investigation. Participants were randomized into one of two supplement groups: 1) 500 mg of quercetin (QUE) once daily or 2) 500 mg of methylcellulose (placebo; …
Prevalence And Differences Of Sport Concussion Symptoms And Severity Among Male And Female University Student Athletes, Tacey Howell, Kristen Mcalexander
Prevalence And Differences Of Sport Concussion Symptoms And Severity Among Male And Female University Student Athletes, Tacey Howell, Kristen Mcalexander
International Journal of Exercise Science: Conference Proceedings
The prevalence of sport concussions continues to increase among university student athletes in the United States. Earlier methods of prevention, such as the Halo and modified football and hockey helmets, have not resulted in significantly fewer sport concussions. Further, even less is known about the differences between male and female university student athletes’ concussion symptoms and severity. PURPOSE: To measure sport concussion prevalence among university student athletes and compare the severity of self-reported symptoms among university male and female student athletes. METHODS: In the Fall of 2021, a modified version of the SCAT5 (Sport Concussion Assessment Tool, 5th Edition) …
Mild Dehydration Led To Increased Difficulty Falling Asleep, Alan Ky, Gabrielle Giersch, Yasuki Sekiguchi, Lawrence E. Armstrong, Elaine C. Lee
Mild Dehydration Led To Increased Difficulty Falling Asleep, Alan Ky, Gabrielle Giersch, Yasuki Sekiguchi, Lawrence E. Armstrong, Elaine C. Lee
International Journal of Exercise Science: Conference Proceedings
Sleep is fundamental process that benefits health and overall quality of life which can be affected by various aspects of daily living such as dehydration. A study has yet to investigate the impacts of euhydration and mild dehydration on sleep. PURPOSE: The purpose of this study was to examine effects of euhydration, mild-dehydration, and ad libitum drinking on sleep. METHODS: Eighteen male participants (mean±SD; age, 23±4y; height, 175.8±5.7cm; weight, 80.1±9.7kg) reported to the laboratory with different hydration status for 4 consecutive mornings(Day 1, baseline; Day 2, euhydrated; Day 3, mild-dehydrated; Day 4, ad libitum drinking). Hydration status was …