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Articles 91 - 120 of 136
Full-Text Articles in Physiology
Mathematical Modeling Of Heart Rate Deflection Point In Relation To Respiratory Compensation And Treadmill Running Performance, Kayla Baker
Electronic Theses and Dissertations
Heart rate deflection point (HRDP), identified as the second breakpoint in the "intensity / heart rate" relationship, is indicative of the anaerobic threshold (AT). This point can be determined via bi-segmental linear regression (2SEG) or through use of the maximal distance model (D-max); however, the relationship between these methods has yet to be investigated 2. Purpose: To compare the use of 2SEG and D-max methods to determine HRDP and to examine the relationship between these values with a metabolic threshold, respiratory compensation point (RCP), as well as running performance [5,000 meter treadmill time trial (5Ktime)]. Methods: Nineteen recreationally active men …
Cardiovascular Regulation And Effects Of Respiratory Motor Training In Patients With Chronic Spinal Cord Injury., Bonnie Legg Ditterline
Cardiovascular Regulation And Effects Of Respiratory Motor Training In Patients With Chronic Spinal Cord Injury., Bonnie Legg Ditterline
Electronic Theses and Dissertations
This dissertation attempts to discover the mechanisms between cardiovascular and respiratory motor control post spinal cord injury (SCI): in normal, non-injured (NI) persons, cardiovascular regulation is dependent upon respiration, but there is nothing that suggests the mechanism for this relationship post-SCI. Thus we hoped to evaluate various aspects of cardiovascular regulation to further illustrate how this relationship is changed or unchanged by SCI. Chapter I describes the anatomy and physiology of the spine, respiratory system, and cardiovascular system in a NI person, and then describes how the function of these systems is changed by SCI. In addition, we describe therapies …
Exercise Mitigates The Effects Of Hyperhomocysteinemia On Adverse Skeletal Muscle Remodeling., Lee Winchester
Exercise Mitigates The Effects Of Hyperhomocysteinemia On Adverse Skeletal Muscle Remodeling., Lee Winchester
Electronic Theses and Dissertations
Background: Hyperhomocysteinemia (HHcy) is heavily implicated in diabetes and cardiovascular disease. HHcy is known for causing inflammation and vascular remodeling, particularly through production of reactive oxygen species (ROS) and matrix metalloproteinase-9 (MMP-9). Although its impact on skeletal muscle is rather unclear, HHcy is known to cause skeletal muscle weakness and functional impairment. The impact of HHcy on inflammation makes it seem likely that HHcy causes skeletal muscle fibrosis through induction of inflammatory factors and destructive macrophages. Exercise has been shown to reduce homocysteine levels and therefore, could serve as a promising intervention for HHcy. The purpose of this study was …
Combination Treatment With Conjugated Linoleic Acid And Nitrite Protects Against Myocaridal Infarction., Natia Qipshidze Kelm
Combination Treatment With Conjugated Linoleic Acid And Nitrite Protects Against Myocaridal Infarction., Natia Qipshidze Kelm
Electronic Theses and Dissertations
According to the CDC, the most common type of heart disease is coronary artery disease, which frequently leads to myocardial infarction (MI). Therapeutic approaches to lessen the resulting cardiovascular injury associated with MI are limited. Recently, the management paradigm for cardiac injury has entered the molecular era and microRNAs (miRNAs) have been shown to act as negative regulators of gene expression by inhibiting mRNA translation and/or stimulating mRNA degradation. A single miRNA can modulate physiological or disease phenotypes by regulating whole functional systems. Importantly, miRNAs can regulate cardiac function, thereby modulating heart muscle contraction, heart growth and morphogenesis. MicroRNA-499 (miRNA-499) …
Pulmonary Diffusing Capacity Is Unaltered In Elite Swimmers After Restricted Breathing Training., Benjamin Todd Ogle 1990-
Pulmonary Diffusing Capacity Is Unaltered In Elite Swimmers After Restricted Breathing Training., Benjamin Todd Ogle 1990-
Electronic Theses and Dissertations
Controlled frequency breath (CFB) holding is a swim training modality that involves holding one’s breath for ~12 strokes before taking another breath. We looked to examine the effects of CFB training on pulmonary diffusing capacity for nitric oxide (DLNO) and carbon monoxide (DLCO). Elite swimmers (n = 25) were divided into either the CFB or a group that breathed regularly, every ~3rd stroke. The training intervention included 16 sessions of 12 x 50-m repetitions with either breathing pattern. Approximately 60% of the males and ~20% of the females were above the upper limits of normal for diffusing capacity at baseline. …
Intramuscular Anabolic Signaling And Endocrine Response Following Different Resistance Exercise Protocols In Trained Men, Adam Gonzalez
Intramuscular Anabolic Signaling And Endocrine Response Following Different Resistance Exercise Protocols In Trained Men, Adam Gonzalez
Electronic Theses and Dissertations
The mammalian/mechanistic target of rapamycin complex 1 (mTORC1) signaling pathway appears to be the primary regulator of protein synthesis and growth. While resistance exercise paradigms are often divided into hypertrophy (HYP) and strength (STR) protocols, it is unknown whether these protocols differentially stimulate mTORC1 signaling. The purpose of this study was to examine mTORC1 signaling in conjunction with circulating hormone concentrations following a typical lower-body HYP and STR resistance exercise protocol. Ten resistance-trained men (24.7±3.4y; 90.1±11.3kg; 176.0±4.9cm) performed each resistance exercise protocol in a random, counterbalanced order. Blood samples were obtained at baseline (BL), immediately (IP), 30 minutes (30P), 1 …
Acute Pro-Inflammatory Immune Response Following Different Resistance Exercise Protocols In Trained Men, Adam Wells
Acute Pro-Inflammatory Immune Response Following Different Resistance Exercise Protocols In Trained Men, Adam Wells
Electronic Theses and Dissertations
The successful regeneration of muscle tissue is dependent upon the infiltration of phagocytic CD14++CD16- monocytes that support the proliferation and differentiation of myogenic precursor cells. Physiologically, the magnitude of the cellular response following resistance exercise is dictated by the level of receptor expression on the plasma membrane of the monocyte, as well as the secretion of their cognate ligands from tissue resident cells. However, it remains unclear whether the innate pro-inflammatory immune response varies with different resistance training protocols, and how it may impact recovery and the muscle remodeling process. Therefore, the purpose of this investigation was to examine temporal …
Behavior, Energetics, And Swimming Performance Of The American Paddlefish, Polyodon Spathula, In A Lower Mississippi River Oxbow, Bryan Andrew Cage
Behavior, Energetics, And Swimming Performance Of The American Paddlefish, Polyodon Spathula, In A Lower Mississippi River Oxbow, Bryan Andrew Cage
Electronic Theses and Dissertations
Paddlefish often frequent oxbows and backwater habitats between periods of migration. Speculation as to the use and energetic savings associated with this seasonal residence has not been substantiated. This study used radio telemetry to track the seasonal movements and swim tunnel respirometry to estimate metabolic rates and swimming efficiency of paddlefish within an oxbow located just north of Clarksdale, Mississippi (Moon Lake). Paddlefish overwintered in the deepest portions of Moon Lake with little movement into shallower areas. Paddlefish swimming performance was measured at four swimming speeds (76.04, 91.27, 106.50, and 121.72 cm/s) to determine the cost of locomotion over season …
The Effect Of Training Volume And Intensity On Improvements In Muscular Strength And Size In Resistance-Trained Men, Gerald Mangine
The Effect Of Training Volume And Intensity On Improvements In Muscular Strength And Size In Resistance-Trained Men, Gerald Mangine
Electronic Theses and Dissertations
The magnitude of improvements in muscular strength and size are influenced by the volume and intensity of a resistance training program. While it is clearly advantageous for resistance-trained individuals to utilize programming specific to these goals, it not clear which is more important. Therefore the purpose of the present investigation was to determine the effect of focusing on training volume versus intensity on changes in muscle size and strength. Changes in muscular strength and size were examined in 29 resistance-trained men following 8 weeks of resistance training. Participants were randomly assigned to either a high volume (VOL, n = 14, …
Boundary Contour Based Surface Representation., Yong Su
Boundary Contour Based Surface Representation., Yong Su
Electronic Theses and Dissertations
We receive most information about our surrounding space and objects through the eyes. To reconstruct the 3D space and objects in the visual system from the 2D retinal images, surface representation must be a critical intermediate stage in the visual processing stream. It is hypothesized in the dissertation that the visual system represents textured surface by a border-to-interior strategy: boundary contours would be encoded first and then border-ownership assignments would be resolved. This process would solve the related problems such as figure-ground segregation, surface depth relationship, occlusion, transparency, etc. As a result, the boundary contours of the surfaces would be …
Post-Transcriptional Regulation Of The Type Iia Sodium-Phosphate Cotransporter By Parathyroid Hormone., Rebecca Dale Murray
Post-Transcriptional Regulation Of The Type Iia Sodium-Phosphate Cotransporter By Parathyroid Hormone., Rebecca Dale Murray
Electronic Theses and Dissertations
The type IIa sodium-phosphate cotransporter (Npt2a) is expressed in the apical membrane of the renal proximal tubule and is responsible for the reabsorption of the majority of the filtered load of phosphate. Parathyroid hormone (PTH) is secreted by the parathyroid gland in response to a decrease in serum calcium or an increase in serum phosphorus, and acutely induces phosphaturia through the rapid stimulation of endocytosis of Npt2a and its subsequent lysosomal degradation. Chronic PTH stimulation leads to sustained phosphaturia, but the mechanisms for the chronic regulation of Npt2a by PTH remain unclear. We hypothesize that PTH decreases Npt2a mRNA levels …
Effects Of Step Training On The Kidneys Following Spinal Cord Injury In Rats., Pradeepa Poudyal
Effects Of Step Training On The Kidneys Following Spinal Cord Injury In Rats., Pradeepa Poudyal
Electronic Theses and Dissertations
Detrusor-sphincter dyssynergia after chronic spinal cord injury (SCI) leads to over-distention, high bladder pressures and vesico-ureteric reflux into the kidney, resulting in repeated infections and pyelonephritis. Given the importance/limited knowledge of SCI effects on the upper urinary tract, this study assessed expression of two proteins in the kidneys of contused (T9) male rats relative to controls that are indicative of tissue stress/damage (TGFβ, CD11b). The impact of two therapeutic rehabilitation strategies, 60 minutes of step training and general exercise, was then assessed on these protein levels relative to non-trained SCI controls, plus the effectiveness of a shorter training duration (30 …
The Effect Of A Controlled Frequency Breath Holding Training Program On Running Economy Among Elite College Swimmers., Patrick Sims 1988-
The Effect Of A Controlled Frequency Breath Holding Training Program On Running Economy Among Elite College Swimmers., Patrick Sims 1988-
Electronic Theses and Dissertations
Running economy (RE) is the amount of oxygen consumed while running at a submaximal intensity. Along with aerobic capacity (VO2max), RE is an important predictor of running performance. Little research has investigated changes in RE with restricted breathing training [i.e. controlled breath-holding (CFB)] during exercise. RE may improve ~6% amongst a novice swimming cohort through CFB training, but this has not been established in elite swimmers. The purpose was to further establish that CFB training (16 sessions of 12 x 50-m with ~15 seconds rest between each 50-m, using only ~2 breaths per 50-m) can improve RE in 25 elite …
Hif-1Α In The Heart: Provision Of Ischemic Cardioprotection And Remodeling Of Nucleotide Metabolism, Joe Wu
Hif-1Α In The Heart: Provision Of Ischemic Cardioprotection And Remodeling Of Nucleotide Metabolism, Joe Wu
Electronic Theses and Dissertations
In our studies we found that stabilized expression of HIF-1α in heart led to better recovery of function and less tissue death after 30 minutes of global ischemia, via mechanisms that preserve the mitochondrial polarization. Our group previously showed that HIF-1α conferred ischemic tolerance by allowing cardiomyocytes to use fumarate as an alternative terminal electron acceptor to sustain anaerobic mitochondrial polarization. The source of fumarate was identified as the purine nucleotide cycle (PNC). Here we discovered that HIF-1α upregulates AMP deaminase 2 (AMPD2), the entry point to the PNC. The combination of glycolysis and the PNC may protect the heart's …
Mirna-21 Has Anti-Inflammatory Effects In The Macrophage Response To Peritonitis., Rebecca Elise Barnett
Mirna-21 Has Anti-Inflammatory Effects In The Macrophage Response To Peritonitis., Rebecca Elise Barnett
Electronic Theses and Dissertations
This project investigated the role of miRNA-21 in the macrophage response to peritonitis; with the goal of understanding whether the associated mechanism has potential benefits in the clinical treatment of peritonitis. A novel therapeutic intervention in the treatment of peritonitis could modulate the host immune response to decrease an exaggerated pro-inflammatory innate response and then prevent or ameliorate the development of sepsis and organ failure. We found the following: 1. MiRNA-21 expression increases in peritoneal macrophages after lipopolysaccharide (LPS) stimulation. 2. Over expression of miRNA-21 decreases TNF-a secretion from macrophages after LPS stimulation. Suppression of miRNA-21 expression results in increased …
The Anti-Obesogenic Effects Of Nitric Oxide., Brian Edward Sansbury 1985-
The Anti-Obesogenic Effects Of Nitric Oxide., Brian Edward Sansbury 1985-
Electronic Theses and Dissertations
Obesity is a strong risk factor for developing type 2 diabetes and cardiovascular disease and has quickly reached epidemic proportions with few tangible and safe treatment options. While it is generally accepted that the primary cause of obesity is energy imbalance, i.e., more calories are consumed than are utilized, understanding how caloric balance is regulated has proven a challenge. Molecular processes and pathways that directly regulate energy metabolism represent promising targets for therapy. In particular, nitric oxide (NO) is emerging as a central regulator of energy metabolism and body composition. NO bioavailability is decreased in animal models of obesity and …
Inflammation-Resolving Lipid Mediators Promote Revascularization To Enhance Wound Healing., Michael Jingyuan Zhang
Inflammation-Resolving Lipid Mediators Promote Revascularization To Enhance Wound Healing., Michael Jingyuan Zhang
Electronic Theses and Dissertations
Wound healing is a highly concerted cellular process that begins with inflammation and proceeds to resolution to revascularize the site of injury. Although inflammation is essential to revascularization during wound healing, it is now recognized that resolution is an active process that is equally important. Other investigations have implicated a beneficial effect of resolving inflammation and promoting resolution in the remission of inflammatory pathologies. Recently investigations have yielded a novel class of ?-3 fatty acid derived lipid mediators, biosynthesized by leukocytes, which are capable of resolving inflammation and promoting resolution. We therefore hypothesized that these leukocyte-derived pro-resolving lipid mediators can …
Epigenetic Modifications Associated With Aortic Remodeling In Hyperhomocysteinemia., Nithya Narayanan
Epigenetic Modifications Associated With Aortic Remodeling In Hyperhomocysteinemia., Nithya Narayanan
Electronic Theses and Dissertations
Background: Hyperhomocysteinemia (HHcy) is prevalent in hypertensive patients and is an independent risk factor for aortic pathologies. HHcy is known to cause an imbalance between matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) leading to accumulation of collagen in the aorta resulting in stiffness and development of hypertension. Although the exact mechanism of extracellular matrix remodeling (ECM) is unclear, emerging evidence implicates epigenetic regulation involving DNA methylation. The purpose of the study was to investigate whether inhibition of DNA methylation reduces high blood pressure by regulating aortic ECM remodeling in HHcy. Methods: In the first set of experiments, we …
Myocyte-Specific Overexpression Of Stromal Cell-Derived Factor 1 Facilitates Cardiac Regeneration And Improves Myocardial Function After Infarction In Mice., Detlef Ernst-Rudolf Obal
Myocyte-Specific Overexpression Of Stromal Cell-Derived Factor 1 Facilitates Cardiac Regeneration And Improves Myocardial Function After Infarction In Mice., Detlef Ernst-Rudolf Obal
Electronic Theses and Dissertations
Background: Interruption of cardiac stromal cell-derived factor 1 (SDF1)-CXCR4 axis by chronic AMD3100 administration increased myocardial injury after permanent coronary artery ligation, demonstrating the important role of this chemokine in cardiac regeneration. Hypothesis: Cardiomyocyte-specific conditional overexpression of SDF prevents heart failure after permanent coronary ligation and facilitates cardiac regeneration. Methods and Results: Tetracycline-controlled, a-myosine heavy chain promoter directed overexpression of cardiac SDF resulted in a significant increase of SDF expression (SDF: 8.1 ng / g protein) compared with littermate WT mice (0.02 ng / g protein) four weeks after doxycycline withdrawal. SDF overexpression increased AKT and casein kinase 1 levels …
The Cross Education Of Neuromuscular Economy, Kyle Beyer
The Cross Education Of Neuromuscular Economy, Kyle Beyer
Electronic Theses and Dissertations
Cross education is the phenomenon by which the untrained limb will experience a gain in strength following a unilateral resistance training program. However, little is known as to the underlying adaptation occurring in the untrained limb. Purpose: To examine the effect of dynamic unilateral resistance training on the strength and neuromuscular adaptations of both the trained and untrained legs. Methods: Eight previously untrained males (22.38±2.92 y, 1.73±0.08 m, 75.26±14.53 kg) completed a four-week unilateral resistance training program, while another eight untrained males (24.00±4.57 y, 1.84±0.05 m, 94.21±16.14 kg) served as controls. Isometric leg extension strength, leg press 1 repetition maximum …
The Effects Of Stress Hormones On Preferences For Acoustic Signals In Female Green Treefrogs (Hyla Cinerea) And Barking Treefrogs (Hyla Gratiosa), Anna Gabriell Davis
The Effects Of Stress Hormones On Preferences For Acoustic Signals In Female Green Treefrogs (Hyla Cinerea) And Barking Treefrogs (Hyla Gratiosa), Anna Gabriell Davis
Electronic Theses and Dissertations
Ecological stressors (i.e., high predator density, low food availability) are often associated with increased variation in mate choice by females. The association between environmental stressors and variation in mate choice suggests that circulating stress hormones (i.e., glucocorticoids) may mediate such effects, but this idea remains largely unexplored. I examined how circulating glucocorticoids affect preferences for male advertisement calls in female green treefrogs, Hyla cinerea, and barking treefrogs, Hyla gratiosa. Specifically, I examined whether administration of corticosterone (CORT) decreases preferences for call rate and/or call duration - two acoustic features that are highly variable and characteristically under directional selection via mate …
Endocrine And Contralateral Muscle Responses To Short-Term Unilateral Resistance Training, Carleigh Boone
Endocrine And Contralateral Muscle Responses To Short-Term Unilateral Resistance Training, Carleigh Boone
Electronic Theses and Dissertations
PURPOSE: The purpose of this study was to examine the effects of short-term lower body unilateral resistance training on hormonal, muscle morphological, and performance measures in young men. METHODS: Seventeen healthy, untrained young men (Age: 22.8 ± 3.7 y; BMI: 26.5 ± 4.9 kg/m2) were randomly assigned to one of two groups (UT: 22.9 ± 4.6 y, 25.3 ± 4.2 kg/m2; CON: 24.0 ± 4.6 y, 27.7 ± 5.1 kg/m2). Resistance training consisted of 4 weeks of unilateral lower body and bilateral upper body exercises on 3 days per week. Each training session entailed unilateral countermovement jumps (3 × 8), …
The Effect Of Moderate Altitude On High Intensity Running Performance During A Game With Collegiate Female Soccer Players, Jonathan Bohner
The Effect Of Moderate Altitude On High Intensity Running Performance During A Game With Collegiate Female Soccer Players, Jonathan Bohner
Electronic Theses and Dissertations
Competition often requires teams that reside at sea level to compete against opponents whose residence is at a moderate altitude. This may pose a potential competitive disadvantage considering that moderate altitude may cause decrements in VO2max, distance covered, and time to exhaustion in endurance athletes. The purpose of this study was to examine the effect of altitude on game performance measures. Six NCAA Division I female soccer players (20.33 ± 1.21 y; 168 ± 6.45 cm; 62.5 ± 6.03 kg) were retrospectively examined. Comparisons were made between two competitions that were played at sea level (SL) within two weeks of …
The Effects Of High-Intensity Interval Training And 28 Days Of [Beta]-Hydroxy-[Beta]-Methybutyrate Supplementation On Measures Of Aerobic Power And Metabolic Thresholds, Edward Robinson
Electronic Theses and Dissertations
Purpose: To examine the effects of 28 days of β-hydroxy-β-methylbutyrate free acid (HMB) and high-intensity interval training (HIIT) on maximal oxygen consumption (VO2peak), ventilatory threshold (VT), respiratory compensation point (RCP) and time to exhaustion (Tmax) in collegeaged men and women. Methods: Healthy men and women (n=34, age and VO2peak= 22.7+3.1yr and 39.3+5.0 mL. kg-1.min-1, respectively) participated in this study. All participants completed a series of tests prior and subsequent to treatment. A maximal oxygen consumption test was performed on a cycle ergometer to assess VO2peak, Tmax, VT, and RCP. The peak power output (Ppeak), power at VT (PVT) and power …
Effect Of Acute L-Alanyl-L-Glutamine (Sustamine) And Electrolyte Ingestion On Cognitive Function, Multiple Object Tracking And Reaction Time Following Prolonged Exercise, Gabriel Pruna
Electronic Theses and Dissertations
Changes in physiological function occurring during a body water deficit may result in significant decrements in performance, cognitive function and fine motor control during exercise. This may be due to the magnitude of the body water deficit. Rehydration strategies are important to prevent these deleterious effects in performance. The purpose of this study was to examine the changes before and after prolonged exercise of an alanine-glutamine dipeptide (AG) on cognitive function and reaction time. Twelve male endurance-trained runners (age: 23.5 [plus or minus] 3.7 y; height: 175.5 [plus or minus] 5.4 cm; weight: 70.7 [plus or minus] 7.6 kg) participated …
Effect Of Acute L-Alanyl-L-Glutamine (Sustamine) And Electrolyte Ingestion On Plasma Electrolytes, Physiologic Measures, And Neuromuscular Fatigue During Endurance Exercise, William Mccormack
Electronic Theses and Dissertations
The purpose of this study was to compare the efficacy of two dose levels of L-Alanyl-LGlutamine in a commercially available sports drink to the sports drink only on time to exhaustion, neuromuscular fatigue and physiological measures during prolonged endurance exercise. Twelve endurance-trained males (23.5±3.7 yrs; 175.5±5.4 cm; 70.7±7.6 kg) performed four trials, each consisting of 1 hr treadmill runs at 75% of VO2peak followed by a run to exhaustion at 90% of VO2peak. The trials differed in type of hydration. One trial consisted of no hydration (NHY), another required ingestion of only a sports drink (ET), and two trials required …
Exercise Participation During Weight Loss On A High Protein – Low Carbohydrate Diet Plan In Females Aged 15-25 Years, Margaret Mobley-Meulman
Exercise Participation During Weight Loss On A High Protein – Low Carbohydrate Diet Plan In Females Aged 15-25 Years, Margaret Mobley-Meulman
Electronic Theses and Dissertations
Weight gain due to poor diet and lack of exercise is responsible for over 300,000 deaths each year (U.S. Department of Health and Human Services, 2010). Obese adults have an increased risk for serious health conditions including high blood pressure and cholesterol, type 2 diabetes, coronary heart disease, stroke, gallbladder disease, osteoarthritis, sleep apnea, respiratory problems, and certain cancers (National Cancer Institute, 2012). Participation in exercise can help control weight, strengthen muscles and bones, and reduce the incidence of cardiac events, stroke, hypertension, type 2 diabetes, colon and breast cancers, osteoporotic fractures, gallbladder disease, obesity, depression, anxiety, and delay mortality …
Physiological Muscle Qualitative Changes In Response To Resistance Training In Older Adults, Tyler Scanlon
Physiological Muscle Qualitative Changes In Response To Resistance Training In Older Adults, Tyler Scanlon
Electronic Theses and Dissertations
Muscle function is determined by structure and morphology at the architectural level. In response to resistance training, older adults have demonstrated that the neuromuscular system has a substantial adaptability, which may compensate for muscle size and quality and lead to improved functional capacities and higher quality of life. PURPOSE: The purpose of this study was to examine the effect of six weeks of progressive resistance exercise on muscle morphology and architecture in healthy older adults. METHODS: Twenty- five healthy men and women were randomly assigned to either six weeks of progressive resistance training (RT) (n=13; age = 71.08 ± 6.75, …
The Effects Of 6-Weeks Of Resistance Training On The Neuromuscular Fatigue Threshold In Older Adults, Nadia Emerson
The Effects Of 6-Weeks Of Resistance Training On The Neuromuscular Fatigue Threshold In Older Adults, Nadia Emerson
Electronic Theses and Dissertations
Age-related deficits in muscle mass, strength, and function place an increased burden of work on existing skeletal muscle and may lead to early onset of neuromuscular fatigue (NMF) during activities of daily living. Resistance exercise (RE) is the proven method for improving neuromuscular function in healthy older adults. PURPOSE: To investigate the effects of 6 weeks of RE on the NMF threshold as well as strength and functional performance in older adults. METHODS: Twenty-four older adults were randomly assigned to 6 weeks of RE (EXE; n = 12; age 72 ± 6.3 y; BMI 28.4 kg/m2 ) or control (CONT; …
Do Changes In Muscle Architecture Effect Post- Activation Potentiation, Danielle Reardon
Do Changes In Muscle Architecture Effect Post- Activation Potentiation, Danielle Reardon
Electronic Theses and Dissertations
Purpose: To examine the effect of three muscle potentiation protocols on changes in muscle architecture and the subsequent effect on jump power performance. Methods: Maximal (1RM) squat strength (Mean SD=178.3 ± 36.6kg), vertical jump power, and muscle architecture were obtained in 12 resistance trained men (25.2±3.6y; 90.67±12.7kg). Participants randomly completed three squatting protocols at 75% (3 x 10 reps), 90% (3 x 3 reps) or 100% (1 x 1) of their 1RM, or no workout (CON), with each protocol being separated by one week. During each testing session ultrasound and vertical jump testing were assessed at baseline (BL), 8min post …