80 Clinical Trials for Various Conditions
The purpose of this clinical trial is to look at tyrosol's effects on endurance, strength, and fatigue resistance in humans. Additionally, the combination of tyrosol and creatine monohydrate will also be looked at to determine if there is a cooperative effect from using both together. It will be conducted over a 4-week period to compare the effects of the following substances: 1) tyrosol, 2) a placebo (a look-alike substance that contains no drug), 3) creatine, and 4) a combination containing both creatine and tyrosol. Endurance, strength, and fatigue resistance will be compared between groups through repeated testing (described below). Participants who pass initial screening will be invited on-site for day one (Visit 1) of testing where they will proceed with a series of tests which will include the following: (1) body composition; (2) cognitive testing; (3) full-body strength testing; (4) grip strength on both hands; (5) muscle power testing; (6 \& 7) Resting blood lactic acid testing followed by 5RM (repetition maximum) bench press, leading to multiple sets of bench press (based on the previous weight) completed to failure, followed by another blood lactic acid reading; (8) a repeat of the muscle power testing; (9) a 1 mile time trial run completed as fast as possible. After the 4-week supplementation period (\~28-34 days), all original measures will be repeated as before in the same order (Visit 2). Approximately 24 hours later (Visit 3) participants will then repeat all physical testing procedures except tests 1, 6, 7, and 8, to determine physical recovery. Additionally, questionnaires for soreness and perceived recovery will also be completed at the beginning of Visit 2 and 3, and again on its own as the only testing event at 48 hours post-Visit 2 (visit 4).
This research is examining the changes in muscle size, muscle function, body composition, strength, and blood vessel health. Specifically, the changes in these variables over the course of 8 weeks of training with or without blood flow restriction (BFR) and the supplementation of creatine or placebo (dextrose, a sugar in the form of a powder which is the standard placebo). Creatine monohydrate (Cr) is the most popular supplement for athletes and benefits all populations, however women are still very hesitant to take it due to the misconception of weight gain. This study will look to measure those muscle and body changes with exercise.
The primary objective of this study is to determine if creatine supplementation improves acoustic, auditory perceptual, physiologic, and patient-reported outcome measures in patients over 65 years of age. In the study, 20 participants will be enrolled and randomly assigned to receive either creatine or placebo.
This study will be a 6 week creatine supplementation intervention with performance familiarization and pre and post testing. Participants will report to the human performance laboratory (HPL) for baseline to read and sign an informed consent explaining the procedures and potential risks and benefits of participation. Participants will then complete a physical activity readiness questionnaire (PAR-Q) prior to performing any physical tasks. Participants will also be asked to complete testing below in the order described. Participants will become familiar with the pre/post performance tests, which include isokinetic testing, medicine ball throw, vertical jump, and Wingate testing. Twenty-four hours following visit 1, participants will return to the HPL for visit 2 where they will undergo a second familiarization session for the isokinetic testing and Wingate testing only - these two tests require individuals to provide maximal physical efforts and research suggests that participants should perform multiple familiarization trials before beginning experimental trials. At least 72 hours following visit 2, participants will return to the HPL for visit 3 to perform the baseline performance assessments. Following the baseline assessments, participants will be divided into two supplementation groups: creatine and placebo (maltodextrin). These groups will be randomized and matched based on body mass, hours of dance training per week, meat intake, and menstrual cycle phase. Participants will be asked to consume one of the two supplements daily for 42 consecutive days and maintain their regular dance training and eating behaviors. Participants will report to the HPL daily to receive their supplement between the hours of 12pm and 2pm. Following the last day of supplement consumption, participants will report to the HPL to perform post-testing assessments which will be identical to pre testing.
The investigators hypothesize that the administration of a widely available, naturally occurring dietary supplement, creatine monohydrate, will reduce the severity of depression in individuals with type 2 diabetes. The purpose of this study is to determine whether 12 weeks of creatine supplementation is an effective treatment for depression in individuals with type 2 diabetes.
The purpose of this study is to compare the physical fitness performance-as measured by the Air Force Physical Fitness Test (PFT)-of subjects that, in conjunction with exercise, will take creatine supplementation over a four week period versus those that do not.
The primary hypothesis is that compared to placebo, 10g of daily creatine monohydrate for eight weeks will be associated with significant increases in frontal lobe phosphocreatine and beta-nucleoside triphosphate (β-NTP) concentrations. A secondary hypothesis is that decreased depressive symptoms measured with the Children's Depression Rating Scale-Revised (CDRS-R) and Montgomery-Asberg Depression Rating Scale (MADRS) will be reciprocally correlated with increased β-NTP concentrations.
Background: Creatinine (Crn) concentration is used to assess renal function via calculation of GFR (Glomerular Filtration Rate). By RIFLE (Risk, Injury, Failure, Loss, End Stage Kidney Disease) criteria, acute kidney injury (AKI) and acute renal failure (ARF) are defined by a two-fold and three-fold increase in serum Crn, respectively. Crn is a breakdown product of proteins and circulating creatine, and it is generally a benign product present in serum. Creatine is a nutritional supplement that has been available since 1993, and it is widely used among athletes today. Methods: In an IRB approved, blinded crossover trial, 25 human volunteers ingested 2 creatine supplements to determine any associated statistically significant increase in serum Crn and clinically significant increase in serum Crn to a degree associated with AKI or ARF. Urine samples were also collected to examine excretion patterns after an ingested sample. Participants ingested 10 gm of creatine ethyl ester (CEE) or creatine monohydrate (CrM) and had serum Crn assayed at 0, 1, 2, 3, 4, 5 and 24 hours. Urinary Crn levels were assayed at 0, 1.5, 3, 5 and 24 hours. Exclusion factors were any history of renal disease or use of creatine within the last month. Statistical analysis was performed by Wilcoxon Matched-Pair Signed Ranks Test and descriptive summary statistics were performed.
The purpose of the study is to evaluate the safety and efficacy of high dose creatine and two dosages of tamoxifen treatment in amyotrophic lateral sclerosis (ALS).
The purpose of this study is to determine of creatine will prevent or treat the muscle toxicity side effect of statin drug therapy, whose symptoms are aching, cramping, and weakness. This is tested in patients who have had this side effect from 3 different statin drugs.
Huntington's disease (HD) is a slowly progressive disorder that devastates the lives of those affected and their families. There are no treatments that slow the progression of HD, only mildly effective symptomatic therapies are available.Creatine monohydrate is considered a nutritional supplement. The purpose of CREST-E is to test whether high-dose creatine can slow the progressive functional decline that occurs in persons 18 years or older with early clinical features of HD. The long-term safety, tolerability and effectiveness of up to 40 grams daily creatine compared to placebo is studied. A variety of biological processes are assessed for markers of disease activity or progression and creatine effects. Up to 50 active research centers globally will enroll 650 subjects.
This study intends to study the safety and tolerance of the combination of pyruvate, creatine, and niacinamide over 6 months in patients with PSP.
This study was designed determine whether use of creatine monohydrate, a dietary supplement, can increase skeletal muscle mass and strength and improve the response to progressive resistance exercise training in people with HIV infection.
The purpose of this trial is to determine if the nutritional supplement creatine slows the progression of Parkinson's disease over time.
Creatine is a naturally occurring chemical involved in the production of energy in muscle. Abnormalities in creatine have been linked to the progression of degenerative neuromuscular diseases such as amyotrophic lateral sclerosis (ALS, or Lou Gehrig's Disease). This study will test whether taking creatine can improve the symptoms of ALS.
The purpose of this study is to determine whether nine months of administration of creatine monohydrate results in an increase in muscle strength in patients with amyotrophic lateral sclerosis (ALS).
This study, CREST-HD, will examine the safety and tolerability of 8 grams of creatine in subjects affected by Huntington's disease (HD). Biochemistry and neuroimaging will be used to examine the potential effects of creatine on HD.
Creatine supplementation has been shown to increase exercise performance at sea level. The goal of this study is to determine the effects of creatine supplementation on exercise performance at simulated altitude.
skeletal muscle mass and function, is prevalent in up to 60% of colorectal cancer patients. This condition arises from a combination of factors such as aging, inactivity, treatment side effects, malnutrition, tumor burden, and inflammation. Given this complexity, singular interventions may not be sufficient to address sarcopenia in this group. Creatine monohydrate, a compound vital for energy during exercise, has been extensively researched and proven safe and effective across various demographics, including older adults and clinical populations. Studies show that creatine enhances benefits from resistance training, indicating potential to counter muscle mass and function decline post-cancer treatment. This study aims to assess the feasibilty of combining creatine supplementation with resistance training versus resistance training alone in sarcopenic colorectal cancer survivors. A randomized controlled pilot trial will compare a 10-week program of resistance exercise plus creatine (EXSUPP) with resistance exercise alone (EXPLA), each with 20 participants.
The study's purpose is to evaluate whether creatine supplementation can help breast cancer survivors respond quicker to exercise by improving strength, endurance, and body composition. We are seeking to compare information collected from healthy woman of the same age who have never had breast cancer to those participants who have had breast cancer and undergone chemotherapy treatment.
The proposed study aims to compare concussion recovery in those supplementing creatine and those not supplementing creatine. Specific aim 1: To compare number of days until asymptomatic between those taking creatine vs. those not taking creatine following a concussion. Hypothesis: The investigators hypothesize that individuals taking creatine will become asymptomatic sooner than those not taking creatine.Specific aim 2: To compare typical concussion assessment scores (i.e., symptom score, mental status, neurocognition, balance, motor coordination, and visual performance) between those taking creatine vs those not taking creatine following a concussion once asymptomatic.Hypothesis: The investigators hypothesize that individuals taking creatine will have better symptom scores, balance, mental status, and neurocognition assessment scores than those not taking creatine once asymptomatic. The investigators will calculate descriptive statistics for all demographic, days to asymptomatic, and concussion assessments. For specific aim 1, The investigators will calculate a t-test to determine if days to asymptomatic differed in those taking creatine vs. those not taking creatine. For specific aim 2, the investigators will calculate t-tests with Bonferonni corrections to determine if concussion assessment scores (Sport Concussion Office Assessment Tool-6 assessments, CNS Vital Signs, visual assessment) differed in those taking creatine vs. those not taking creatine.
The goal of this clinical trial is to test the use of creatine monohydrate supplementation with resistance training to preserve muscle mass and help lessen prostate cancer progression. The main question it aims to answer is if this treatment will help maintain muscle mass to help in reducing fatigue and improving physical function, independence, and quality of life. Participants will be asked to participate in a 52-week exercise intervention consisting of a twice weekly telehealth resistance training program.
This research study seeks to determine the effects of an enzyme in the human body called NADPH oxidase (NOX) on blood flow. In addition, the study will investigate the benefits of creatine monohydrate, a common sports performance supplement, on blood food and vessel function. Participants will undergo two study arms, one in which they consume a high carbohydrate meal pre- and post-creatine monohydrate supplementation and one in which they will consume a high carbohydrate meal pre- and post-placebo supplementation. Blood flow and endothelial function will be assessed before and for 4 hours following the consumption of a high-carbohydrate meal pre and post-supplementation (creatine monohydrate and placebo).
This is a three-armed clinical trial examining the effect of 5-hydroxytryptophan and creatine monohydrate as augmenting agents for the treatment of depression. Subjects will be randomized between 5-HTP 100mg BID + creatine 5g daily, 5-HTP 200mg BID + creatine 10g daily, vs double placebo, for 8 weeks. The ability of the interventions to affect biomarkers associated with depression will be assessed using brain phosphorus magnetic resonance spectroscopy, functional connectivity imaging, and plasma serotonin levels.
The goal of this clinical trial is to determine the effects of creatine monohydrate and resistance training on lean mass, sleep, muscular strength, and perceived menstrual cycle symptoms in untrained premenopausal females. The main questions it aims to answer are: 1) Does creatine monohydrate supplementation improve body composition, muscular strength, and sleep? 2) Does creatine monohydrate decrease perceived menstrual cycle symptoms compared to a placebo control? Participants will be asked to consume creatine monohydrate daily for 42 consecutive days and well as perform a daily ovulation test. Pre and post testing will include assessments of urine specific gravity to determine hydration status, body composition testing, muscular strength testing and questionnaires. Researchers will compare creatine monohydrate supplementation to a maltodextrin control to see if body composition, sleep, muscular strength, and perceived menstrual cycle symptoms are improved following 6-weeks.
Background: Creatine transporter deficiency (CTD) is a genetic disorder that mainly affects the brain in males. CTD causes intellectual disability that can be mild to severe. People with CTD may have seizures and behavioral issues. They may have slow growth and tire easily. CTD may sometimes be confused with autism or other disorders. Better diagnostics are needed. The study team in an NIH study noted that the faces of children with CTD can look similar. For this natural history study, an expert will examine photos of children with CTD. Any shared traits found might help to diagnose CTD. Objective: To look for shared facial features of children with CTD. Eligibility: Males aged 2 to 40 years old with CTD who were in study 17-CH-0020. Design: Some participants in study 17-CH-0020 had pictures taken of their faces. The NIH study team wants to share these photos with a colleague in Canada. This person is an expert at evaluating how genetic disorders affect people s bodies. Participant data collected during the study may also be sent to this expert. This data may include diagnostic images and results from lab tests. Some children did not have their pictures taken during study 17-CH-0020. Parents are asked to take pictures of these children and send them to the study team. These photos can be sent to a secure portal. The photos can also be taken in-person during a clinic visit. The photos may be printed in clinical study journals. But this is not required. Parents will be asked to sign a separate consent before the photos are published....
While the use of creatine monohydrate supplementation and its associated benefits are well researched and supported, the impact of the timing of when creatine is ingested is a highly nuanced topic. The potential for the timing of administration to make an impact on observed outcomes is an established and appreciated factor and limited research to date has examined the impact of creatine timing. Of the literature that has been published, one study was very short in duration (4 weeks) that possessed a study design that undermined its practicality, two other studies used older individuals, and one study utilized a unilateral training model which may not be an adequate exercise protocol to allow for the ergogenic potential of creatine to mediate any enhancement of training adaptations. Therefore, based on the limited number of studies in young and previously trained populations, future studies examining the effects of pre vs post-training creatine monohydrate supplementation on resistance training adaptations are warranted.
By doing this study, researchers hope to see if creatine monohydrate is a helpful treatment for people with Alzheimer's disease.
The purpose of this study is to investigate the impact of creatine supplementation alone or in combination with a moderate session of physical activity on vascular reactivity and heart hemodynamics in elderly men.
To determine the effects of 4 weeks of creatine monohydrate supplementation on markers of macrovascular and microvascular function, cognitive performance, and physical performance.