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Articles 181 - 210 of 262
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Geranylgeraniol Supplementation Mitigates Muscle Atrophy With Mitochondrial Quality Improvement In Diabetic Rats, Nigel C. Jiwan, Casey Appell, Rui Wang, Chwan-Li Shen, Hui-Ying Luk
Geranylgeraniol Supplementation Mitigates Muscle Atrophy With Mitochondrial Quality Improvement In Diabetic Rats, Nigel C. Jiwan, Casey Appell, Rui Wang, Chwan-Li Shen, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
With diabetes, skeletal muscle mitochondrial quality control (mitochondrial fusion, fission & macro-autophagy) is impaired. Geranylgeraniol (GG) is shown to have a protective effect on preventing mitochondrial damage and muscle health; however, the effect of GG on a diabetic model is not known. PURPOSE: To determine the effect of GG on mitochondrial quality control and muscle cross-sectional area (CSA) in diabetic rats. METHODS: Thirty-five Sprague-Dawley rats were divided into three diet groups: control diet (CON), high-fat diet with 35 mg/kg body weight of streptozotocin (HFD), and HFD with 800 mg/kg body weight of GG (GG). Due to the limited sample, a …
Acute Effects Of Static Stretching On Passive Stiffness Of The Hamstrings In Healthy Young And Older Women, Ahalee C. Farrow, Ty B. Palmer
Acute Effects Of Static Stretching On Passive Stiffness Of The Hamstrings In Healthy Young And Older Women, Ahalee C. Farrow, Ty B. Palmer
International Journal of Exercise Science: Conference Proceedings
Static stretching is often performed prior to exercise to increase range of motion (ROM) and reduce passive stiffness of the muscle-tendon unit. A decrease in passive stiffness after stretching is believed to reduce the risk of injury and improve athletic performance. Previous research has demonstrated that an acute bout of static stretching was effective at decreasing passive stiffness in older men. However, to our knowledge, no previous research has examined the acute effects of static stretching on passive stiffness in older women, nor have there been any studies that have compared these effects with a younger female population. PURPOSE: …
Body Composition Estimation In Youth Athletes: Agreement Between Two-Component Methods, Patrick S. Harty, Abby Ambrosius, Christopher Dodge, Brandon Merfeld, Chinguun Khurelbaatar, Makenna Carpenter, Madelin Siedler, Matthew Stratton, Christian Rodriguez, Jacob Green, Dale Keith, Jake Boykin, Andrew R. Jagim, Grant M. Tinsley
Body Composition Estimation In Youth Athletes: Agreement Between Two-Component Methods, Patrick S. Harty, Abby Ambrosius, Christopher Dodge, Brandon Merfeld, Chinguun Khurelbaatar, Makenna Carpenter, Madelin Siedler, Matthew Stratton, Christian Rodriguez, Jacob Green, Dale Keith, Jake Boykin, Andrew R. Jagim, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Body composition techniques such as skinfold measurements, air displacement plethysmography, and underwater weighing are commonly performed in athletic populations, particularly in youth athletes who may not have access to other laboratory methods. However, little is known whether such body composition estimates can be directly compared across techniques. PURPOSE: To determine the agreement between common two-component (2C) body composition techniques. METHODS: 90 youth athletes (Males: 39; Females: 51; Age: 18.2 ± 2.4 years; Height: 172.0 ± 9.9 cm; Body Mass: 69.0 ± 12.5 kg; Underwater Weighing [UWW] Body Fat Percentage [%BF]: 20.2 ± 7.0%) participated in this study. 2C …
Vertical Jump Performance As A Discriminator Of Playing Ability In Collegiate Female Soccer Players, William N. Riley, Kazuma Akehi, Maxwell S. Rowley, Ahalee C. Farrow, Ty B. Palmer
Vertical Jump Performance As A Discriminator Of Playing Ability In Collegiate Female Soccer Players, William N. Riley, Kazuma Akehi, Maxwell S. Rowley, Ahalee C. Farrow, Ty B. Palmer
International Journal of Exercise Science: Conference Proceedings
Previous studies have assessed the importance of physical characteristics to soccer playing ability by comparing performance-based outcomes between starters and non-starters. Starters are often considered the most skilled players on the team. These players get more playing time than non-starters and have been shown to achieve higher performance outcomes on intermittent fitness tests. However, it remains unclear whether starters can achieve higher performance outcomes on a countermovement vertical jump. PURPOSE: The purpose of this study was to investigate the efficacy of countermovement vertical jump height and peak power to discriminate between starters and non-starters in collegiate female soccer. METHODS …
A Between-Sex Comparison Of The Validity Of Body Fat Percentage Estimates From Four Bioelectrical Impedance Analyzers, Madelin R. Siedler, Christian Rodriguez, Matthew T. Stratton, Patrick S. Harty, Dale Keith, Jacob Green, Jake Boykin, Sarah White, Abegale D. Williams, Brielle Dehaven, Grant M. Tinsley
A Between-Sex Comparison Of The Validity Of Body Fat Percentage Estimates From Four Bioelectrical Impedance Analyzers, Madelin R. Siedler, Christian Rodriguez, Matthew T. Stratton, Patrick S. Harty, Dale Keith, Jacob Green, Jake Boykin, Sarah White, Abegale D. Williams, Brielle Dehaven, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Bioelectrical impedance analysis (BIA) devices administer electrical currents through surface electrodes in contact with the hands and/or feet. The measured reactance and resistance of various bodily tissues to these currents are then used to estimate body fat percentage (BFP) and other body composition values of interest based on algorithms derived from validation data. Owing to different patterns of fat distribution between sexes, it is unclear whether the configuration of electrodes (i.e., hand-to-hand, foot-to-foot, or hand-to-foot) may affect the validity of these devices in males versus females. PURPOSE: The purpose of this study was to determine the validity of BFP …
Associations Of Changes In Body Composition And Athletic Performance In Collegiate American Football Players, Jake Boykin, Dale Kieth, Christine Harrison, Javier A. Zaragoza, Jessica Prather, Matthias Tinnin, Lemuel W. Taylor Iv, Grant M. Tinsley
Associations Of Changes In Body Composition And Athletic Performance In Collegiate American Football Players, Jake Boykin, Dale Kieth, Christine Harrison, Javier A. Zaragoza, Jessica Prather, Matthias Tinnin, Lemuel W. Taylor Iv, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Football practitioners ubiquitously employ offseason resistance training to improve on-field performance. Early offseason training is frequently designed to emphasize accretion of lean and total body mass. While this is a main objective of sport-specific conditioning, there are few investigations comparing correlated changes in body composition, maximal strength, and football-specific performance tests after an early-offseason training program. PURPOSE: The purpose of this analysis was to quantify the relationship between changes in athletic performance and body composition in collegiate American football players. METHODS: Before and after a 7-week offseason training program, body composition and athletic performance were assessed in NCAA Division III …
Relationship Between Changes In Upper Body Fat-Free Mass And Bench Press Performance In American Football Players, Dale S. Keith, Jake R. Boykin, Christine M. Harrison, Javier A. Zaragoza, Jessica Prather, Matthias Tinnin, Lem W. Taylor, Grant M. Tinsley
Relationship Between Changes In Upper Body Fat-Free Mass And Bench Press Performance In American Football Players, Dale S. Keith, Jake R. Boykin, Christine M. Harrison, Javier A. Zaragoza, Jessica Prather, Matthias Tinnin, Lem W. Taylor, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Horizontal pushing strength and strength endurance are relevant attributes for blocking and block shedding in American football. Since most positions in American football require the ability to either block or shed a block, and since bench press repetitions to failure (RTF) with 225 pounds is a component of the NFL draft combine, improving horizontal pushing strength and strength endurance have been key areas of emphasis for strength and conditioning coaches working with these athletes. PURPOSE: The purpose of this analysis was to quantify the relationship between changes in upper body fat-free mass (FFM) and metrics of bench press performance …
Assessment Of Youth Athlete Body Composition Using Bioimpedance Techniques As Compared To A Three-Compartment Model, Jacob J. Green, Abby Ambrosius, Christopher Dodge, Brandon Merfeld, Chinguun Khurelbaatar, Makenna Carpenter, Patrick Harty, Christian Rodriguez, Madelin Siedler, Matthew Stratton, Dale Keith, Jake Boykin, Andrew R. Jagim, Grant M. Tinsley
Assessment Of Youth Athlete Body Composition Using Bioimpedance Techniques As Compared To A Three-Compartment Model, Jacob J. Green, Abby Ambrosius, Christopher Dodge, Brandon Merfeld, Chinguun Khurelbaatar, Makenna Carpenter, Patrick Harty, Christian Rodriguez, Madelin Siedler, Matthew Stratton, Dale Keith, Jake Boykin, Andrew R. Jagim, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Body composition is believed to contribute to success in many sports. For this reason, assessment of body composition with various devices is commonly performed. The agreement between devices warrants exploration, particularly in groups with limited data, such as youth athletes. PURPOSE: To determine the agreement between a 3-compartment model (3C) and bioelectrical impedance analysis (BIA) devices for assessing body composition in youth athletes. METHODS: The body composition of 90 youth athletes was evaluated (51 F, 39 M; age: 18.2±2.4 y; body mass: 69.0±12.5 kg; height: 172.0±9.9 cm; BMI: 23.2±3.2 kg/m2, BF%: 19.7±6.9%). 3C values were produced …
Examining The Relationship Between Trait Energy And Fatigue And Feelings Of Depression In Young Healthy Adults, Marc-Antoine D. Harris, Lauren Nesshoever, Ashley Carpenter, Selina Sampieri, Jennifer Keefer, Chelsea C. Yager, Andrew C. Pickett, Matthew L. Smith, Ali Boolani, Andreas Stamatis, Zacharias Papadakis
Examining The Relationship Between Trait Energy And Fatigue And Feelings Of Depression In Young Healthy Adults, Marc-Antoine D. Harris, Lauren Nesshoever, Ashley Carpenter, Selina Sampieri, Jennifer Keefer, Chelsea C. Yager, Andrew C. Pickett, Matthew L. Smith, Ali Boolani, Andreas Stamatis, Zacharias Papadakis
International Journal of Exercise Science: Conference Proceedings
Depression is usually co-morbid with fatigue. However, we are unaware of studies exploring the relationship between trait energy and fatigue and feelings of depression. Recent evidence suggests that energy and fatigue are two distinct moods. PURPOSE: To examine the association between trait mental and physical energy and fatigue and feelings of depression, within an otherwise healthy young adult cohort. METHODS: Using a cross-sectional design, healthy respondents (n=495) completed a series of self-reported surveys measuring depression, lifestyle factors (sleep, diet, physical activity), and trait mental and physical energy and fatigue. Using a step-wise regression, we controlled for demographics and …
Comparison Of Laboratory-Grade And Consumer-Grade Hand-To-Foot Bioelectrical Impedance Analyzers For Body Composition Estimation, Gabrielle C. Dehaven, Madelin R. Siedler, Christian Rodriguez, Sarah White, Abegale D. Williams, Patrick S. Harty, Matthew T. Stratton, Dale Keith, Jacob Green, Jake Boykin, Grant M. Tinsley
Comparison Of Laboratory-Grade And Consumer-Grade Hand-To-Foot Bioelectrical Impedance Analyzers For Body Composition Estimation, Gabrielle C. Dehaven, Madelin R. Siedler, Christian Rodriguez, Sarah White, Abegale D. Williams, Patrick S. Harty, Matthew T. Stratton, Dale Keith, Jacob Green, Jake Boykin, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Bioelectrical impedance analysis (BIA) is a simple and effective technique to estimate body composition, including body fat percentage (BFP). While these analyzers are a popular method of describing a person’s body composition, laboratory-grade devices are expensive and inaccessible to most people. As a result, they may be an unrealistic method for consumers to use. However, consumer-grade devices are increasingly available. PURPOSE: The purpose of this study was to compare laboratory-grade and consumer-grade bioelectrical impedance analyzers. METHODS: Seventy-five adults (40 F, 35 M) were evaluated using a laboratory-grade, hand-to-foot, multifrequency bioelectrical impedance analyzer (BIALAB; Seca mBCA 515) …
Body Fluid Estimation Via Segmental Multi-Frequency Bioelectrical Impedance Analysis Following Acute Resistance Exercise, Christine Florez, Grant M. Tinsley, Jessica Prather, Javier A. Zaragoza, Cody Teague, Kate Glenn, Justis Kelly, Meagan Bourque, Michelle Hockett, Alex Gutierrez, Matthias Tinnin, Kindyle Brennan, Lemuel W. Taylor Iv
Body Fluid Estimation Via Segmental Multi-Frequency Bioelectrical Impedance Analysis Following Acute Resistance Exercise, Christine Florez, Grant M. Tinsley, Jessica Prather, Javier A. Zaragoza, Cody Teague, Kate Glenn, Justis Kelly, Meagan Bourque, Michelle Hockett, Alex Gutierrez, Matthias Tinnin, Kindyle Brennan, Lemuel W. Taylor Iv
International Journal of Exercise Science: Conference Proceedings
Segmental multi-frequency bioelectrical impedance analysis (S-MFBIA) estimates body composition and fluids by passing electrical currents through the body and can separate the body into distinct segments. The minimum required abstention from exercise before S-MFBIA is unclear. PURPOSE: The purpose of this study was to monitor changes in total body water (TBW), intracellular water (ICW), and extracellular water (ECW) estimated via S-MFBIA following acute, localized bouts of resistance exercise (RE). METHODS: Thirty-two female (n = 18; age: 22.7 ± 1.4 y; height: 167.5 ± 7.5 cm; body mass: 66.6 ± 14.5 kg; body fat: 30.3 ± 6.2%) and male (n= …
The Effects Of A Thermogenic Supplement On Metabolic And Hemodynamic Variables And Subjective Mood States, Jessica M. Prather, Christine Harrison, Amie Vargas, Bella Soto, Abby Harrison, Matthias Tinnin, Grant M. Tinsley, Darryn Willoughby, Lemuel W. Taylor Iv
The Effects Of A Thermogenic Supplement On Metabolic And Hemodynamic Variables And Subjective Mood States, Jessica M. Prather, Christine Harrison, Amie Vargas, Bella Soto, Abby Harrison, Matthias Tinnin, Grant M. Tinsley, Darryn Willoughby, Lemuel W. Taylor Iv
International Journal of Exercise Science: Conference Proceedings
Thermogenic supplements are widely used in the general population to support attempted fat loss; however, the efficacy and safety of these supplements are questioned. PURPOSE: To determine whether a thermogenic supplement affects metabolic rate, hemodynamic responses, and mood states. METHODS: In a randomized double-blind crossover design, 23 females (22.2 ± 3.5 y; 164.8 ± 6.4 cm; 73.5 ± 6.9 kg) who were moderate caffeine consumers (<150mg/day) reported to the lab on a 12-hour fast for baseline assessments of resting energy expenditure (REE) via indirect calorimetry, heart rate (HR), blood pressure (SBP and DBP), and hunger, satiety, and mood states. Thereafter, subjects ingested the assigned treatment (active treatment containing caffeine, micronutrients, and phytochemicals [TR] or placebo [PL]). All variables were reassessed at 30-, 60-, 120-, and 180-minutes post-ingestion. Subjects repeated the same protocol with ingestion of the opposite treatment on a separate day. All data were analyzed using a 2x5 ANOVA with repeated measures and significance was accepted a priori at p<0.05. RESULTS: In the TR group, mean increases in REE of 121 to 166 kcal/d were observed at 30-, 60-, and 180-minutes post-ingestion (p<0.01 for all). PL group mean decreases in REE of 72 to 91 kcal/d were observed at 60-, 120-, and 180-minutes (p<0.05 for all). Similarly, TR resulted in mean increases in expired carbon dioxide of 13 to 19 mL/min at 30- and 60-minutes (p<0.05 for both), and oxygen consumption increased by 12 to 24 mL/min at 30-, 60-, 120-, and 180-minutes (p<0.05 for all) post-ingestion. Respiratory quotient decreased at 120- and 180-minutes in both treatments. A mean decrease in HR of 5 bpm was observed at 30-minutes post-ingestion of TR (p<0.01). Slight increases in SBP of 3 to 4 mmHg were observed at 30-, 120-, and 180-minutes (p<0.05 for all) post-ingestion of TR, while no effects were observed for DBP. Observed increases in SBP were within normal blood pressure ranges. TR decreased subjective fatigue with no other significant changes in mood states. CONCLUSION: …
Validity Of Hand-To-Foot And Foot-To-Foot Consumer Bioimpedance Analyzers: A Four-Compartment Model Comparison, Sarah J. White, Madelin R. Siedler, Christian Rodriguez, Abegale D. Williams, Gabrielle Dehaven, Patrick S. Harty, Matthew T. Stratton, Dale Keith, Jacob Green, Jake Boykin, Grant M. Tinsley
Validity Of Hand-To-Foot And Foot-To-Foot Consumer Bioimpedance Analyzers: A Four-Compartment Model Comparison, Sarah J. White, Madelin R. Siedler, Christian Rodriguez, Abegale D. Williams, Gabrielle Dehaven, Patrick S. Harty, Matthew T. Stratton, Dale Keith, Jacob Green, Jake Boykin, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Body fat percentage (BF%) is a useful variable for predicting disease risk and determining overall fitness. Consumer-grade bioimpedance analyzers seek to provide accurate body composition data while remaining affordable and accessible. PURPOSE: The purpose of this study was to compare body fat percentages obtained from hand-to-foot and foot-to-foot consumer bioimpedance analyzers to a gold standard 4-compartment (4C) model. METHODS: Seventy-five adults (40 F, 35 M; age: 27.2 ± 7.3 y; height: 168.1 ± 8.8 cm; BM: 72.1 ± 16.6 kg; 4C model BF%: 25.0 ± 9.2%) were evaluated by a 4C model, a consumer-grade hand-to-foot bioimpedance analyzer (BIA-HF; …
Acute Resistance Exercise Influences Bioelectrical Impedance Analysis Segmental Fat Mass Estimates, Christian Rodriguez, Christine Harrison, Jessica Prather, Javier A. Zaragoza, Cody Teague, Kate Glenn, Justis Kelly, Meagan Bourque, Michelle Hockett, Alex Gutierrez, Matthias Tinnin, Kindyle Brennan, Lemuel W. Taylor Iv, Grant M. Tinsley
Acute Resistance Exercise Influences Bioelectrical Impedance Analysis Segmental Fat Mass Estimates, Christian Rodriguez, Christine Harrison, Jessica Prather, Javier A. Zaragoza, Cody Teague, Kate Glenn, Justis Kelly, Meagan Bourque, Michelle Hockett, Alex Gutierrez, Matthias Tinnin, Kindyle Brennan, Lemuel W. Taylor Iv, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Bioelectrical impedance analysis (BIA) is an attractive tool for routine assessment of human body composition. However, there is also concern regarding how some variables, particularly exercise, may affect its measurements and therefore limit the conditions under which this technology can provide useful body composition data. PURPOSE: The purpose of this study was to determine if acute, localized resistance exercise (RE) compromises the validity of BIA segmental fat mass (FM) estimates. METHODS: In a crossover design, 32 healthy, resistance trained adults (18 F, 14 M; age: 23.4 ± 2.3 y; height: 172.4 ± 8.7 cm; body mass: 74.9 ± …
Metabolic And Body Composition Changes After Skin Reduction Surgery Following Massive Weight Loss, Patrick S. Harty, Richard Allen Stecker Mr., Grant M. Tinsley, Chad Kerksick
Metabolic And Body Composition Changes After Skin Reduction Surgery Following Massive Weight Loss, Patrick S. Harty, Richard Allen Stecker Mr., Grant M. Tinsley, Chad Kerksick
International Journal of Exercise Science: Conference Proceedings
CASE HISTORY: The patient is a 30-year-old woman who lost more than 200 pounds over the course of several years through a combination of bariatric surgery, diet, and exercise. Generally, losing more than 100 pounds leaves patients with significant amounts of excess tissue and loose skin that must be corrected via skin reduction plastic surgery to support aesthetic and functional outcomes. This excess tissue also contributes to abnormal body composition results and could potentially influence resting metabolic rate. This case study examined the implications of skin reduction surgery on measures of body composition and resting metabolism. The patient presented …
The Prevalence Of Mtss Symptoms Among Men And Women Ncaa Division Iii Student Athletes, Amanda Combs, Kristen Mcalexander
The Prevalence Of Mtss Symptoms Among Men And Women Ncaa Division Iii Student Athletes, Amanda Combs, Kristen Mcalexander
International Journal of Exercise Science: Conference Proceedings
Symptoms of Medial Tibial Stress Syndrome (MTSS) are common among athletes of various sports and levels, but studies describing the prevalence of MTSS symptoms are lacking. Possible contributing factors of MTSS include an individual’s flexor digitorum longus attachment and soleus muscle, a pronated foot, large loads of mechanical forces, large calf girth, and gender. No individual factor has been statistically associated with MTSS, and prevention and treatment are difficult to study. Further, no earlier studies have described the prevalence of MTSS symptoms for men and women NCAA student athletes among various sports. PURPOSE: To measure and describe MTSS symptoms among …
Performance And Body Composition Changes Following An Offseason Training Period In Diii Collegiate American Football Athletes, Christine Harrison, Jake Boykin, Grant M. Tinsley, Jessica Prather, Javier A. Zaragoza, Matthias Tinnin, Shay Smith, Camden Wilson, Lemuel W. Taylor Iv
Performance And Body Composition Changes Following An Offseason Training Period In Diii Collegiate American Football Athletes, Christine Harrison, Jake Boykin, Grant M. Tinsley, Jessica Prather, Javier A. Zaragoza, Matthias Tinnin, Shay Smith, Camden Wilson, Lemuel W. Taylor Iv
International Journal of Exercise Science: Conference Proceedings
Current literature shows that body composition and increased muscle mass correlate with improved performance for American football players thus assessment of these variables at appropriate times throughout competitive cycle are important for tracking individual adaptions but also in assessing the effectiveness of the prescribed training program. PURPOSE: This study assessed changes in anaerobic performance, total body mass (BM), fat-free mass (FFM), and percent body fat (PBF) in football players following a seven-week offseason mesocycle. METHODS: 29 NCAA Division III football players (mean ± SD; age: 19.7 ± 1.5 y; height: 179.8 ± 6.6 cm; body mass [BM]: 96.1 …
Fractionized Exercise Lowers Morning Central Blood Pressure Under Conditions Of Recommended And Long Sleep Durations, Cayla E. Clark, Joaquin U. Gonzales
Fractionized Exercise Lowers Morning Central Blood Pressure Under Conditions Of Recommended And Long Sleep Durations, Cayla E. Clark, Joaquin U. Gonzales
International Journal of Exercise Science: Conference Proceedings
Long sleep duration (9+ hours) is gaining attention as a parameter that may increase the risk for cardiovascular disease with reports of habitually long duration sleepers having higher nighttime blood pressure (BP), higher day-to-day BP variability, and pulse pressure (PP). PURPOSE: The aims of the study were to determine the effect of one week of long duration sleep on central BP, and examine the impact of fractionized exercise on central BP under controlled sleep duration conditions. METHODS: Eleven participants (46± 5 years; 9 women) spent six nights with 8 or 10+ hours in bed to achieve recommended (7-8 …
Menstrual Phase Symptoms And Perceived Musculoskeletal Strength And Flexibility Among Ncaa Collegiate Athletes, Ashton N. Vasquez, Kristen Mcalexander
Menstrual Phase Symptoms And Perceived Musculoskeletal Strength And Flexibility Among Ncaa Collegiate Athletes, Ashton N. Vasquez, Kristen Mcalexander
International Journal of Exercise Science: Conference Proceedings
Previous findings suggest that the associations among menstrual hormones, symptoms and human performance are inconsistent and lacking. Earlier research has measured hormonal fluctuations and symptoms from each of the four menstrual phases (menstrual, follicular, ovulation, and luteal), but their physiological effects on perceived musculoskeletal strength and perceived flexibility remain unclear, particularly among college athletes. PURPOSE: To measure the prevalence and associations among self-reported menstrual symptoms, perceived overall strength and perceived flexibility in NCAA female athletes during each of the four menstrual phases. METHODS: In the Fall of 2020, a survey consisting of demographic questions and questions of perceived strength, flexibility, …
Ginger Root Extract Increases Mitochondrial Fission And Mitophagy In Diabetes Mellitus Rats, Casey Appell, Nigel Jiwan, Chwan-Li Shen, Hui-Ying Luk
Ginger Root Extract Increases Mitochondrial Fission And Mitophagy In Diabetes Mellitus Rats, Casey Appell, Nigel Jiwan, Chwan-Li Shen, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
Diabetes (DM) is accompanied by mitochondrial dysfunction (i.e., mitochondria fission/fusion and mitophagy) in which result in an accumulation of damaged mitochondria and further impaired insulin resistance. Ginger root extract (GRE) has been shown to improve mitochondrial biogenesis and decreased respiratory coefficient in DM model, however, the effect of GRE on the basal mitochondria fission/fusion and mitophagy state is limited. PURPOSE: To determine the effect of GRE on mitochondria fission/fusion and mitophagy transcript abundance in rats with diabetes induced by high-fat diet (HFD) with streptozotocin (STZ). METHOD: Sprague-Dawley rats were randomly divided into 3 groups: standard diet (STD; n=11), HFD with …
Geranylgeraniol Increases Autophagy And Mitophagy Gene Expression In Soleus Of Rats With Diabetes, Nigel C. Jiwan, Casey Appell, Rui Wang, Chwan-Li Shen, Hui-Ying Luk
Geranylgeraniol Increases Autophagy And Mitophagy Gene Expression In Soleus Of Rats With Diabetes, Nigel C. Jiwan, Casey Appell, Rui Wang, Chwan-Li Shen, Hui-Ying Luk
International Journal of Exercise Science: Conference Proceedings
The autophagy and mitophagy (selective autophagy for mitochondria) processes are important in maintaining muscle homeostasis, e.g., removing damaged mitochondria. With diabetes, skeletal muscle autophagy decreases. Geranylgeraniol (GG) has been shown to reduce mitochondrial damage; however, the effect of GG on basal autophagy and mitophagy in diabetic rats is not known. PURPOSE: To determine the effect of GG on selective autophagy and mitophagy genes in rats with diabetes induced by a high-fat diet (HFD) with streptozotocin (STZ). METHODS: Sprague-Dawley rats were divided into three groups: normal diet (CON; n=11), HFD with 35 mg/kg body weight of STZ (HFD; n=9), …
Cross-Sectional And Longitudinal Relationships Between Skinfold Thicknesses Obtained By Ultrasonography And Body Fat Estimates Produced By Dual-Energy X-Ray Absorptiometry, Jacob J. Green, Robert W. Smith, Patrick S. Harty, Matthew T. Stratton, Christian Rodriguez, Sarah White, Abegale D. Williams, Baylor A. Johnson, Jacob Dellinger, Marqui Benavides, Madelin R. Siedler, Grant M. Tinsley
Cross-Sectional And Longitudinal Relationships Between Skinfold Thicknesses Obtained By Ultrasonography And Body Fat Estimates Produced By Dual-Energy X-Ray Absorptiometry, Jacob J. Green, Robert W. Smith, Patrick S. Harty, Matthew T. Stratton, Christian Rodriguez, Sarah White, Abegale D. Williams, Baylor A. Johnson, Jacob Dellinger, Marqui Benavides, Madelin R. Siedler, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Ultrasonography (US) and dual-energy X-ray absorptiometry (DXA) are frequently used to assess body composition. Although sometimes compared cross-sectionally, their agreement longitudinally requires further exploration. Purpose: The purpose of the present study was to examine the cross-sectional and longitudinal relationships between total and segmental raw skinfold thicknesses obtained by US and total and segmental body composition estimates produced by DXA over the course of an overfeeding study. Methods: Twenty healthy, resistance-trained males (mean ± SD; age: 22.0 ± 2.6 years; height: 179.1 ± 7.0 cm; body mass: 74.8 ± 11.5 kg, body fat: 17.5 ± 4.5%) completed a 6-week intervention that …
Anthropometric Predictors Of Concentric Hip, Knee, And Ankle Work During A 5x5 Conventional Deadlift Routine, Dale S. Keith, Daniel Scherrer, Brandon Nunley, John R. Harry, Grant M. Tinsley
Anthropometric Predictors Of Concentric Hip, Knee, And Ankle Work During A 5x5 Conventional Deadlift Routine, Dale S. Keith, Daniel Scherrer, Brandon Nunley, John R. Harry, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
The deadlift is one of the most commonly performed exercises to strengthen the lower body, as well as one of the main lifts in powerlifting and strongman competitions. However, literature exploring the deadlift exercise and its variations remains quite limited compared to other popular exercises like squats and bench press. PURPOSE: The purpose of this exploratory analysis was to determine if there are relationships between anthropometric characteristics (arm length, torso length, thigh length, and shank length) and hip, knee, and ankle joint angular concentric work during a 5 sets of 5 repetitions (5x5) conventional deadlift (CDL) routine. METHODS: …
Offseason Body Composition Changes Detected By Dual-Energy X-Ray Absorptiometry Versus Multifrequency Bioelectrical Impedance Analysis In Collegiate American Football Athletes, Jake R. Boykin, Grant M. Tinsley, Christine M. Harrison, Jessica Prather, Javier Zaragoza, Matthias Tinnin, Shay Smith, Camden Wilson, Lem Taylor
Offseason Body Composition Changes Detected By Dual-Energy X-Ray Absorptiometry Versus Multifrequency Bioelectrical Impedance Analysis In Collegiate American Football Athletes, Jake R. Boykin, Grant M. Tinsley, Christine M. Harrison, Jessica Prather, Javier Zaragoza, Matthias Tinnin, Shay Smith, Camden Wilson, Lem Taylor
International Journal of Exercise Science: Conference Proceedings
In American football, offseason training is designed to promote increases in muscle strength and size in athletes. Tracking changes in body composition may confer key information about the effectiveness of training programs to football practitioners. PURPOSE: The present study assessed the relationship between body composition changes estimated by dual-energy x-ray absorptiometry (DXA) and bioelectrical impedance analysis (BIA) in football players during the initial period of an offseason training program. METHODS: Body composition in 29 NCAA Division III American football players (mean ± SD; age: 19.7 ± 1.5 y; height: 179.8 ± 6.6 cm; body mass [BM]: 96.1 ± …
Analyzing The Between-Day Reliability Of Three-Dimensional Body Scanners For Body Composition Assessment, Gabrielle C. Dehaven, Madelin R. Siedler, Matthew T. Stratton, Patrick S. Harty, Christian Rodriguez, Dale Keith, Jacob Green, Jake Boykin, Jacob Dellinger, Sarah White, Abegale D. Williams, Grant M. Tinsley
Analyzing The Between-Day Reliability Of Three-Dimensional Body Scanners For Body Composition Assessment, Gabrielle C. Dehaven, Madelin R. Siedler, Matthew T. Stratton, Patrick S. Harty, Christian Rodriguez, Dale Keith, Jacob Green, Jake Boykin, Jacob Dellinger, Sarah White, Abegale D. Williams, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
In the growing world of health and well-being, three-dimensional (3D) scanning is emerging as a popular tool to assess body composition. While body composition cannot be truly “measured” in living humans, it can be approximated. This, however, leads to two types of errors (i.e., technical and biological) in the body composition assessment. PURPOSE: This study was used to determine what percent or range of percentages in body fat one must exceed before concluding a real change has occurred. By conducting assessments on separate days, with only a short period of time between them, true changes in body composition are …
Relationships Between Functional Performance And Quadriceps Muscle Size And Quality In Healthy Older Women, Ahalee C. Farrow, Chinonye C. Agu-Udemba, Ethan A. Mitchell, Ty B. Palmer
Relationships Between Functional Performance And Quadriceps Muscle Size And Quality In Healthy Older Women, Ahalee C. Farrow, Chinonye C. Agu-Udemba, Ethan A. Mitchell, Ty B. Palmer
International Journal of Exercise Science: Conference Proceedings
Ultrasound assessments of quadriceps cross-sectional area (CSA) and echo intensity (EI) are commonly used to evaluate lower-body muscle size and quality in older adults. It has been hypothesized that muscle CSA and EI of the quadriceps may be important predictors of functional performances such as gait speed and vertical jump power. However, limited data exist regarding how these parameters associate with performance during a timed up-and-go (TUG) task. PURPOSE: The purpose of this study was to examine the relationships between TUG performance and muscle CSA and EI of the quadriceps in older women. METHODS: Twenty healthy older women …
Day-To-Day Precision Error And Least Significant Change For Two Commonly Used Bioelectrical Impedance Analysis Devices, Madelin R. Siedler, Patrick S. Harty, Matthew T. Stratton, Christian Rodriguez, Dale Keith, Jacob Green, Jake Boykin, Jacob Dellinger, Sarah White, Abegale D. Williams, Brielle Dehaven, Grant M. Tinsley
Day-To-Day Precision Error And Least Significant Change For Two Commonly Used Bioelectrical Impedance Analysis Devices, Madelin R. Siedler, Patrick S. Harty, Matthew T. Stratton, Christian Rodriguez, Dale Keith, Jacob Green, Jake Boykin, Jacob Dellinger, Sarah White, Abegale D. Williams, Brielle Dehaven, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
Bioelectrical impedance analysis (BIA) devices administer electrical currents through surface electrodes to estimate overall body fluids from the measured resistance and reactance of bodily tissues. The proportion of fat versus fat-free mass can be further estimated by these devices using algorithms developed from reference data. BIA devices are commonly used in field as well as laboratory settings due to their convenience, ease of use, and relatively low cost. PURPOSE: The purpose of this study was to determine the day-to-day precision error (PE) and least significant change (LSC) of the percent body fat (PBF), fat mass (FM), and fat-free mass …
Comparison Of Indirect Calorimetry And Common Prediction Equations For Evaluating Changes In Resting Metabolic Rate Induced By Resistance Training And A Hypercaloric Diet, Christian Rodriguez, Patrick S. Harty, Matthew T. Stratton, Madelin R. Siedler, Robert W. Smith, Baylor A. Johnson, Jacob R. Dellinger, Abegale D. Williams, Sarah J. White, Marqui L. Benavides, Grant M. Tinsley
Comparison Of Indirect Calorimetry And Common Prediction Equations For Evaluating Changes In Resting Metabolic Rate Induced By Resistance Training And A Hypercaloric Diet, Christian Rodriguez, Patrick S. Harty, Matthew T. Stratton, Madelin R. Siedler, Robert W. Smith, Baylor A. Johnson, Jacob R. Dellinger, Abegale D. Williams, Sarah J. White, Marqui L. Benavides, Grant M. Tinsley
International Journal of Exercise Science: Conference Proceedings
An individual’s resting metabolic rate (RMR) is commonly the largest contributor to total daily energy expenditure. Prediction equations are most often employed by practitioners to estimate RMR, due to their superior practicality in many settings relative to laboratory methods like indirect calorimetry (IC). The ability to quantify RMR change over time may be more valuable than cross-sectional estimates as practitioners can then utilize these changes to prescribe adjustments to one’s nutritional intake. PURPOSE: The purpose of this study was to assess the validity of several commonly used prediction equations to track RMR changes during a hypercaloric nutrition intervention and …
The Effects Of Acute Resistance Exercise On Dual-Energy X-Ray Absorptiometry Measure Of Body Composition, John W. Barker, Timothy Berreth, Robert Fox, Megan Maldonado, Chase Vancleave, Rachel Wong, Javier Zaragoza, Matthias Tinnin, Grant M. Tinsley, Lemuel W. Taylor Iv, Kindyle Brennan
The Effects Of Acute Resistance Exercise On Dual-Energy X-Ray Absorptiometry Measure Of Body Composition, John W. Barker, Timothy Berreth, Robert Fox, Megan Maldonado, Chase Vancleave, Rachel Wong, Javier Zaragoza, Matthias Tinnin, Grant M. Tinsley, Lemuel W. Taylor Iv, Kindyle Brennan
International Journal of Exercise Science: Conference Proceedings
Dual Energy X-Ray Absorptiometry (DXA) is a reference laboratory method for estimating body composition but there are questions concerning the pre-testing guidelines that should be followed to increase validity and reliability of this methodology. PURPOSE: The purpose of this study was to determine if acute, localized resistance exercise disrupts the validity of DXA total body composition estimates. METHODS: In a crossover design, 18 healthy, resistance-trained, college-aged adults, including 7 females (age: 22.7 ± 1.9 y; height: 165.4 ± 8.4 cm; body mass: 62.1 ± 10.9 kg; body fat: 25.9 ± 7.3%) and 11 males (age: 24.2 ± 4.1 …
The Effects Of Acute Resistance Exercise On Bioelectrical Impedance Analysis Measures Of Body Composition, Rachel Wong, John Barker, Timothy Berreth, Robert Fox, Megan Maldonado, Chase Vancleave, Javier Zaragoza, Matthias Tinnin, Grant M. Tinsley, Lemuel W. Taylor Iv, Kindyle Brennan
The Effects Of Acute Resistance Exercise On Bioelectrical Impedance Analysis Measures Of Body Composition, Rachel Wong, John Barker, Timothy Berreth, Robert Fox, Megan Maldonado, Chase Vancleave, Javier Zaragoza, Matthias Tinnin, Grant M. Tinsley, Lemuel W. Taylor Iv, Kindyle Brennan
International Journal of Exercise Science: Conference Proceedings
Bioelectrical Impedance Analysis (BIA) is a popular method of body composition assessment; however, validity of BIA is thought to be highly dependent on adhering to pre-test criteria, including the abstinence from exercise prior to testing. PURPOSE: The purpose of this study was to determine if acute, localized resistance exercise (RE) compromises the validity of BIA total body composition estimates. METHODS: In a crossover design, 16 healthy, resistance trained adults, including 7 females (age: 22.7 ± 1.9 y; height: 165.4 ± 8.4 cm; body mass: 62.1 ± 10.9 kg; body fat: 25.9 ± 7.3%) and 9 males (age: 24.3 …