55 Clinical Trials for Various Conditions
The goal of this clinical trial is to learn if transcranial direct current stimulation (tDCS) of the dorsolateral prefrontal cortex (DLPFC) can impact muscle fatigue. The main questions it aims to answer are: 1. Does tDCS of the left DLPFC increase the time that a fatiguing contraction can be maintained? 2. Does tDCS of the left DLPFC decrease the rate of increase of muscle activity, force error, and standard deviation of force during a fatiguing contraction. Researchers will compare tDCS of the left DLPFC to a SHAM stimulation (a type of stimulation that feels like real tDCS but does not elicit physiological effects) to see if tDCS of the left DLPFC works to reduce the progression of muscle fatigue. Participants will: Performing two experimental sessions held 3-10 days apart (usually 7 days) Perform a 9 hole pegboard test, maximum voluntary contractions, and a fatiguing contraction.
The goal of this controlled-feeding cross-over diet intervention is to compare a beef diet to a vegetarian diet on muscle fatigue in older adults. The aims are: AIM 1: To test the hypothesis that muscle fatigue is attenuated in older adults consuming beef compared to older adults consuming a plant-based diet. AIM2: To test the hypothesis that daily beef consumption improves biochemical indicators related to muscle fatigue. Participants will be randomized to consume either a beef-based diet or vegetarian diet under controlled-feeding conditions for 8 weeks. After a 2-week washout period, participants will cross-over to consume either the beef diet or vegetarian diet for 8 weeks. Body composition and functional muscle outcomes will be measured during each 8-week feeding period. Blood samples will also be collected.
The goal of this randomized counterbalanced repeated measures study is to test beet-root juice supplementation and red light therapy augment forearm muscle endurance in apparently healthy older adults over 65 years of age. The main questions seek to answer the following question: Does beet-root juice supplementation improve forearm muscle endurance compared to a placebo supplement? Does red light therapy improve forearm muscle endurance compared to a sham light exposure? Does beet-root juice supplementation in combination with red light therapy improve forearm muscle endurance compared to a placebo-sham light control?
800-nm laser light has been shown to delay muscle fatigue when applied before exercise. The effect of illumination during the aerobic phase of strenuous exercise has not been studied. The investigators hypothesize that the increased energy donated to cells during the aerobic phase will significantly delay muscle fatigue. A novel aspect of this study is to include simultaneous treatment with near infrared light at 800 nm and 905 nm. Fatigue index and change in lactate blood level will be used to compare the different laser treatments for each participant. Monte Carlo simulations of light energy reaching the muscle will be carried out, based on skin-fold thickness measurements of each participant. The investigators believe this will be the first report of optical dosimetry as a function of adipose thickness and it will enable estimation how much of the light applied to the skin surface is able to penetrate to the muscles that are thought to be affected. The results of this study will help clinicians to optimize treatment for individual patients.
The purpose of this study is to investigate the effects of Kinesio Taping on the position sense of shoulder after muscle fatigue.
The purposes of the study are to determine whether oxidative stress causes the muscle of dialysis patients to tire more quickly than muscle of people without kidney disease and to determine whether treatment with N-acetylcysteine, an antioxidant, can improve muscle endurance.
This study is designed to observe muscle oxygen saturation during intense video game using gridlock training with and without upper arm compression sleeves.
We hypothesize that adenosine-5'-triphosphate (ATP) supplementation will be able to enhance motor unit recruitment while simultaneously blunting the decline in power and reaction time that is typically seen during repetitive sprints. This will give researchers a better understanding of the mechanism by which ATP supplementation can augment power, especially under high fatiguing conditions.
This study will evaluate lower extremity and trunk neuromuscular control in 78 nulligravid and postpartum women. Participants will attend two experimental sessions, approximately 1 week apart, to assess neuromuscular function. Physical activity levels will also be assessed.
The goal of this project is to evaluate the therapeutic potential of pioglitazone (PIO) to target underlying mechanisms that promote muscle fatigue in patients with breast cancer. This represents an off-label use of this compound, both in terms of the patient population and the clinical phenotype targeted. The central research hypothesis of this study is that daily pioglitazone will restore transcriptional downregulation of pathways within skeletal that promote fatigue.
This study proposal seeks to examine the efficacy of probiotic supplementation at mitigating changes in immune function and recovery after completion of intense, stressful exercise while also allowing for a better understanding of its ability to promote recovery and maintenance of physical performance.
The purpose of the study is to see how different forms of the squat exercise change my body's leg muscle activity. Four forms of the traditional back squat will be used: traditional back squat, barefoot squat, box squat, and traditional back squat with chains.
This study will measure efficacy of early in-patient exercise as an adjunct to current Standard of Care (SOC) for 96 patients in a multi-centre trial. The secondary purpose is to assess the efficacy of a personalized, structured, and quantifiable exercise program (MP10) carried out soon after admission until hospital discharge (including during the BICU stay and time on ventilation).
The primary objective is to investigate the correlation between physical and mental fatigue to lower extremity force production in adults to determine if there is an association of performance output that is inhibited by mental and physical stressors that mimic sport environments that can be further investigated to determine the importance of not only physical training and exercise for athletes, but also mental and cognitive exercises with physical task to enhance performance training and rehabilitation of individuals. In adults, how does physical and mental fatigue in combination compared to those who are just physically fatigued affect average peak height in performance of five CMJ with hands on hips.
Myofascial Pelvic Pain (MPP) is a frequently overlooked musculoskeletal cause of chronic pelvic pain affecting 10-20% of all adult women. Despite high prevalence and societal costs, few effective treatments exist and are difficult to access due to shortages of skilled personnel. Treatments for MPP using electrical stimulation to induce muscle fatigue have proven efficacy at reducing pain, improving circulation, and promoting tissue healing, but have proven difficult to implement in gynecologic practice. The aim of this three-arm randomized study is to evaluate the utility of transvaginal electrical stimulation at a fixed frequency of 200 Hz in women with symptomatic MPP in comparison to the standard, first-line treatment with education, stretching, and low-impact exercise. Nursing staff without prior training will be taught to deliver this high-frequency transvaginal electrical stimulation (HF-TES) treatment using the device. Responses to treatment provided by a specialist physician and licensed vocational nurse will be compared. Patients with \>50% pain improvement will determine the effectiveness of HF-TES. Responses to treatment provided by a specialist physician and licensed vocational nurse will also be compared. Participants will be followed for 3 months following treatment completion.
The majority of transcranial direct current stimulation (tDCS) studies have failed to consider sex as a modulating factor. This neglect may partly account for the high inter-subject variability bemoaned by many tDCS investigators (e.g., approximately 50% of participants do not respond to tDCS) and has certainly delayed progress in the field. Therefore, research into how sex influences stimulation-related outcomes is vital to fully understand the underlying mechanisms of tDCS, which has shown great inconsistency. Because of the menstrual cycle, the hormonal levels of women fluctuate considerably more than in men. Importantly, these hormonal variations might impact the efficacy of neuromodulatory tools, like tDCS. It is suggested that estrogen, which is high in the second follicular phase, reinforces excitatory mechanisms in the motor cortex. However, because anodal tDCS enhances cortical excitation there is also a possibility of excessive excitability. For instance, anodal tDCS may lead to overexcitation and non-optimal performance when it is applied in the second follicular phase of the menstrual cycle. Currently, there is a lack of knowledge on how the phases of the menstrual cycle affect tDCS performance outcomes in healthy young women because no studies have examined if and how the phases of the menstrual cycle alter tDCS efficacy. This study is critical for determining the optimal time to administer anodal tDCS, and the ideal intensity for that administration, to achieve the most beneficial results. Furthermore, this investigation will emphasize the need for future tDCS studies to test women during the same menstrual cycle phase.
The central objective of this study is to validate new algorithms that coordinate between functional electrical stimulation (FES) and the exoskeleton during sitting-to-standing, walking, and standing-to-sitting movements. The secondary objective is to optimize the algorithms as well as assess their ability to reduce FES-induced muscle fatigue by using ultrasound imaging as a sensing modality. This study will include persons with no disabilities and persons with Spinal Cord Injury (SCI). A research set-up comprising of a lower-limb exoskeleton and FES system will be used to achieve sitting-to-standing, walking, and standing-to-sitting movements. Ultrasound Imaging probes may be used to record muscle activity of the stimulated muscles. The signals derived from ultrasound will be used to optimize FES in order to reduce muscle fatigue as well as assess muscle fatigue.
Pre-diabetes (Pre-D) is a precursor to type 2 diabetes (T2D) and characterized by increased exercise fatigability of lower limb muscles, that can impede exercise performance. The cause for the increased fatigability in people with Pre-D is not known. Given the profound vascular disease present in people who have had uncontrolled diabetes for several years, we will determine whether dynamic, fatiguing contractions of the lower limb muscles in people with Pre-D are limited by vascular dysfunction at multiple levels along the vascular tree including the artery, arteriole, and/or capillary. This clinical trial involves a novel exercise training regime involving blood flow restriction to the exercising limb will be used as a probe to further understand the vascular mechanisms for increased fatigability in people with Pre-D and T2D. The long-term goal is to better understand what limits exercise and functional performance in people with diabetes to help develop targeted, more effective exercise programs.
Among Veterans, the prevalence of chronic kidney disease (CKD) is reported to be as high as 47.3% and a third higher than the general population. Muscle wasting and dysfunction have been identified as primary consequences of CKD. Disease-induced reductions in lean tissue adversely affect muscle fatigability. Consequently, muscle fatigability may serve as a potential limiting factor that contributes to activity limitations. However, there is a lack of evidence informing our understanding of muscle fatigability in patients with CKD. Dialysis treatment is a major factor contributing to the high financial costs of CKD care. Thus, in addition to potential health and quality of life benefits, treatments capable of maintaining kidney function or delaying the onset of dialysis treatment would provide substantial socio-economic benefit. Both lean body mass and muscle fatigability may be improved through strength training. Eccentric-overload (i.e. muscle lengthening) progressive resistance exercise (PRE) has been shown to be safe and effective for a variety of chronic conditions. Eccentric PRE using portable flywheel technology may provide a clinically viable treatment option to combat muscle impairments in CKD given the cost effectiveness and minimal space requirements for this mode of exercise. The purpose of this study is to assess feasibility of the eccentric-overload PRE regimen for Veterans with CKD stage 3 \& 4 predialysis using a prospective single-arm pre-test post-test intervention design. The primary aim of the project is to determine the effects of eccentric-overload PRE on muscle fatigability in Veterans with CKD Stages 3 \& 4 predialysis. Feasibility of the regimen will be determined by the time needed to complete the 4-exercise regimen and the perceived exertion levels reported by the study participants.
The purpose of this study is to investigate the effect of CK-2127107 versus placebo on skeletal muscle fatigue assessed as change from baseline versus 14 days of treatment in sum of peak torque during isokinetic knee extensions. This study will also assess the effects of CK-2127107 on physical performance via a short physical performance battery (SPPB), stair-climb test and 6 minute walk test.
Skeletal muscle dysfunction (sarcopenia) is an under-recognized target organ complication of CKD with substantial adverse clinical consequences of disability, hospitalization, and death. Sarcopenia in this proposal is defined by impaired metabolism and physical function associated with decreased skeletal muscle mass or function. Skeletal muscle tissue relies on mitochondria to efficiently utilize oxygen to generate ATP. Impaired mitochondrial energetics is a central mechanism of sarcopenia in CKD. The investigators propose a series of studies designed to shed light on the pathophysiology of sarcopenia in persons with CKD not treated with dialysis. Investigators will conduct a randomized-controlled intervention trial of combined resistance training and aerobic exercise vs. health education to assess changes in skeletal muscle mitochondrial function, metabolism and physical function. Investigators hypothesize that exercise improves mitochondrial function and physical function in persons with CKD. If successful, these experiments will identify novel pathophysiologic mechanisms for CKD-associated sarcopenia. The proposed study will provide useful insight into benefits associated with exercise among patients with CKD and investigate mechanisms associated with improved metabolism, muscle function and physical function in population.
The goal of this research is to determine the effectiveness of a powered prosthesis compared to an unpowered prosthesis during short bouts of walking, extended periods of walking (to fatigue), and performance in the community.
Resveratrol, a compound found in red wine and dark-skinned grapes, will improve the function of mitochondria (energy producing components) within the leg muscles of moderate functioning older adults. The investigators will look at the role Resveratrol plays in improving physical function by studying the connection of changes in mitochondrial function and changes in physical function.
Adenosine-triphosphate (ATP) serves as the sole energy source for muscle contraction. Therefore human performance of brief maximal exercise is limited, in part, by the availability of ATP to the contracting muscle. Because muscle ATP storage is small (enough to sustain maximal exercise for less than 1 second), factors that enhance either storage or resynthesis of ATP may have a positive impact on repeated muscle contractions. The current study will test the hypothesis that increasing ATP availability to muscle via oral supplementation will improve performance of repeated high intensity exercise as measured by a) work performed in each of the three 50 contraction fatigue tests, b) sum of total work performed, and c) percentage decrement in total work from the first to third third 50 contraction test.
The goal of this randomized placebo controlled crossover trial is to determine effects of oral nicotine and caffeine pouches on anaerobic performance, autonomic function, cognition, and behavior in adult non-obese adult male volunteers between ages 21 and 40. Accordingly, the primary aims of the study are to determine the effects of acute oral nicotine pouches, oral caffeine pouches, or both, on measures of * anaerobic performance * cognition * cardiovascular and autonomic function * appetite and food intake. Researchers will compare oral nicotine pouches, oral caffeine pouches, both oral nicotine and caffeine pouches, and a flavor and color matched placebo to see if how they differentially affect measurements of * physical performance, * cognition, * cardiovascular and autonomic function * appetite and food intake. On four separate occasions, participants will be asked to place the oral pouches in their mouth and complete several anerobic cycling, cognitive, and balance tests while blood and salivary biomarkers, subjective appetite ratings, and cardiovascular and autonomic function measurements are collected. After each trial, participants will complete a 24-hr food record.
The optimal recovery duration depends on the intensity of exercise and in the present study the intensity was maximal power for 4-s while cycling an 'Inertial Load' ergometer (ILE). Recovery duration of 15, 30 and 45-s were given between 30 successive sprints.
Study to assess the safety and tolerability of repeated doses of an investigational new drug in patients with cancer and cachexia.
The primary objective of this trial is to evaluate the effect of oral administration of an Astaxanthin formulation compared to placebo after one month alone and after an additional 3 months of exercise training on mitochondrial and skeletal muscle function in elderly subjects with evidence of mitochondrial dysfunction/sarcopenia.
Exercise training has beneficial effects in cancer survivors to minimize some of the side effects of cancer and its treatment and improve long-term prognosis, but there are numerous hurdles for individuals diagnosed with, and being treated for, cancer to participate in exercise programs. The goal of this research study is to begin to evaluate whether exercise training via neuromuscular electrical stimulation (NMES) has beneficial effects on skeletal muscle size and function in cancer survivors.
This study is funded by the Moody Endowment. In this project, we will investigate the potential effect of skeletal muscle nitric oxide (NO) production on skeletal muscle anabolism, muscle strength, physical function, and body composition in older individuals. Further, we will determine whether augmentation of NO-mediated signaling reduces fatigue and fatigability.