Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 46 for “"muscle performance"”.
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Muscle performance during slow isokinetic speeds
The purpose of this study was to investigate the possible mechanism responsible for the decrease in force during the 5°/sec velocity compared to the isometric velocity. Subjects (n = 9) completed MVC knee extension exercises during eccentric speeds of 5, 10, and 15°/sec, as well as isometric …
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The Effect of Astym Treatment on Muscle Performance
… and treats pain, limited mobility, and muscle weakness associated with musculoskeletal pathology. The purpose of this study was to determine if Astym treatment administered to the lower extremity would result in an immediate change of maximal force output during a unilateral isometric …
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Effect of Dietary Restriction on Muscle Performance in Drosophila
… and sarcopenia, (the degeneration of muscle mass, strength and function). The aim was to understand sarcopenia in the model organism, Drosophila melanogaster, by monitoring the decline in output of a single twitch muscle, the jump muscle, with age. Jumping assays were performed using …
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Proteomic analysis of diurnal variation in human skeletal muscle performance
Phenotyping of human muscle based on its profile of myosin heavy chain isoforms is commonly used to help understand changes in muscle function. However, in many instances, measureable changes in force output or contractility occur in the absence of any change in myosin heavy chain profile. …
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Flexure-Based Device Enables Precise Quantitative Monitoring of Muscle Performance
… understanding of the contractile mechanisms of muscle. 3D engineered muscle models have been developed that mimic the structure and functionality of native muscle. These models have the potential to be used in a wide variety of clinical applications such as neuromuscular disease modeling and …
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The effect of protective knee braces on agility and muscle performance
Thirty-two Virginia Tech varsity football players served as subjects to examine the effect of protective knee braces on agility and selected isokinetic strength, power, and endurance measures. Each subject performed the Semo agility test in each of three experimental conditions: braced with the …
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Partial GSK3 knockdown improves muscle performance in mdx mice: investigating the cellular mechanisms
Duchenne muscular dystrophy (DMD) is a severe muscle wasting disease caused by an X-linked mutation to the dystrophin gene that primarily affects boys. The absence of functional dystrophin protein leads to muscle wasting and weakness that progressively worsens over time with affected boys typically …
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The effect of graded and short-term, high-intensity exercise on expiratory muscle performance
… In order to determine if expiratory muscle function is affected by increased ventilitory demand, this study evaluated maximal expiratory pressure, PeMax, in response to two separate short-term, high-intensity exercise trials. Males (n=7) and females (n=5) not currently in active …
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Alterations in neck muscle performance and proprioception with fatique, altered posture and recurrent neck pain
Altered neuromuscular processing and motor output as both a risk and perpetuating factor for chronic neck pain is a relative new area of study. The cervical flexion relaxation response (FRR) is a reproducible and reliable marker of differences in neuromuscular function between neck pain patients …
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Development of an apparatus to quantify the volitional muscle performance of rat plantar flexors in vivo
… voluntary eccentric, concentric, and isometric muscle actions and varying work-rest cycles on muscle performance, behavior, and histological and biochemical response. Using a custom-designed apparatus that was attached to a standard operant chamber, rats were operantly conditioned with food …
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Manipulating dietary protein density and its effect on training-induced muscle performance and overall health among middle-aged adults
… major implications as the progressive loss of muscle strength is a common consequence of aging and negatively impacts physical performance and ultimately, independence and quality of life. The underlying mechanistic cause of this age-related strength loss is likely related to alterations in …
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Effects of exercise, renal disease, and digoxin on skeletal muscle Na+,K+-ATPase and related effects on plasma K+ and muscle performance
In skeletal muscle, the Na+,K+-ATPase enzyme regulates trans-membrane Na+ and K+ fluxes during contractions, and therefore also affects muscle excitability and plays an important role in delaying muscle fatigue. Consequently, any modulation of Na+,K+-ATPase content or activity has the potential to …
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An investigation into the ultrastructural parameters of abdominal muscles in children and adolescents with spastic type cerebral palsy and the effect on postural muscle performance
… type of motor disorder - involves increased muscle tone, a rigid posture in the limbs and muscle weakness resulting in impairment of gross motor function, trunk instability and co-ordination. The management of CP cases includes a broad spectrum of therapeutic interventions, therefore …
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A study of the role of glycogen in skeletal muscle performance and of myosin heavy chain isoform expression in amphibian skeletal muscle using the toad Bufo marinus
… contribute knowledge to two areas of inquiry in muscle research: one concerned with the molecular mechanism(s) underlying the positive correlation between intracellular glycogen content and skeletal muscle performance and the other with the MHC isoform composition in amphibian skeletal muscle and …
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Effects of beta-hydroxy beta-methylbutyrate (HMB) supplementation on gluteus medius muscle fiber composition and muscle performance in adult Thoroughbred horses exercising to fatigue on a high-speed treadmill
… (HBM), a leucine metabolite, alters muscle composition and metabolism leading to strength and agility improvements in human athletes. To determine if HMB affects athletic performance and muscle function in horses, Thoroughbred geldings were fed a control (CON; n=5) or HMB (n=6) …
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The influence of pressure stimulus intensity on pain perception and neuromuscular performance in healthy males
… those able to tolerate it whilst maintaining performance levels gaining a competitive edge over their opponents (Egan, 1987). Studies have shown that the presence of experimental pain reduces muscle performance (Farina et al, 2002; Farina et al, 2008) when pain is induced via hypertonic saline …
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Effects of emphysema and chronic hypoxemia on skeletal muscle oxygen supply and demand
Skeletal muscle dysfunction in chronic obstructive pulmonary disease (COPD) is a condition in which peripheral skeletal muscle undergoes myopathic changes which impair muscle function, limit physical performance, and can lead to significant disability. While the etiology of the dysfunction is …
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Effects of Reduced Muscle Glycogen on Sarcoplasmic Reticulum (SR), Muscle and Exercise Performance
… during exercise is associated with reduced muscle glycogen. However, evidence linking glycogen content to fatigue is lacking. In this study we examined whether reduced muscle glycogen content limited SR function or muscle performance. Two groups of female Sprague-Dawley rats were fasted for …
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A comparative study of the effects of meclofenamate, diclofenac and placebo, in combination with physiotherapy, on the healing of acute quadriceps and hamstring muscle tears
… rate and extent of healing of acute hamstring muscle tears. Sixty patients were recruited and treated at No's 1 and 2 Military Hospitals in Voortrekkerhoogte and Wynberg, Cape Town, respectively. Patients were randomly allocated to one of three treatment groups: meclofenamate, diclofenac and …
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