View clinical trials related to Dietary Supplementation.
Filter by:Resistance exercise training (RET) in children and adolescents has become a popular area of research, with a growing body of evidence supporting its use. Position and consensus statements about RET for children indicate that it is safe and effective at increasing muscular strength, improving sport performance, and mitigating injury risk. Neural and muscular mechanisms can improve muscle strength following RET. Neural factors include improved recruitment and firing of an individual's motor units, and muscular factors primarily include an increase in the size of the muscle (hypertrophy). In children, little is known about how these mechanisms relate to muscle strength. There is very little evidence of morphological changes following RET in children. Therefore, conventional wisdom is that children rely only on neural factors to improve strength following RET. Nevertheless, some studies have suggested RET-induced muscle hypertrophy in children and adolescents, indicating that with certain training protocols, children may achieve muscle growth. Hypertrophy of muscle fibres occurs when the rate of muscle protein synthesis (MPS) is greater than the rate of protein breakdown, and is enhanced with the ingestion of dietary amino acids. Due to ethical concerns with obtaining muscle samples (i.e., from muscle biopsies) in pediatric populations, MPS rates have not been previously assessed following RET in children. Recent advancements in stable-isotope methodology (specifically, leucine) allow for the estimation of MPS in a non-invasive breath test. The objective of the proposed research is to examine the effects of an acute bout of RET on leucine retention (a proxy for MPS) in children, adolescents, and adults using a non-invasive breath test.
The aim of this study was to determine whether grape seed extract (GSE) supplementation could reduce the blood pressure (BP) in response to static exercise and post exercise muscular ischemia (PEMI) in normotensive young adults. In 12 healthy subjects (7 male and 5 female, 24.6±3.4 yr), we compared acute effect of both GSE (600 mg) and placebo (PL: 600 mg) on changes from rest in systolic BP (SBP), diastolic BP (DBP), mean arterial pressure (MAP), heart rate (HR), stroke volume (SV), cardiac output (CO), and total peripheral resistance (TPR) during static exercise (SE) and PEMI. Subjects completed 2 min of SE at 30% of maximal voluntary contraction (MVC) followed by 2 min of PEMI.
This study was to examine the additive benefits with combined grape seed extract (GSE) and L-citrulline supplementation on hemodynamic responses to dynamic exercise, 11 young, healthy males were recruited for this study.
The purpose of this investigation is to determine if supplementation with the 4D dietary supplement impacts perceptual-cognitive and visual-motor skills in healthy individuals.
The purpose is to conduct a randomized, single-masked crossover study to determine if acute consumption of a commercially available, highly palatable dark chocolate bar can improve visual performance. Vision testing will include multiple measures of contrast and color perception, reaction time, effects of distraction on visual performance during simulated hands-free phone calls, simulated marksmanship, as well as multiple, objective electro-diagnostic tests including standard and color visual-evoked potentials and various types of electro-retinograms to assess visual pathway function.
This study was designed to examine how different forms of creatine impact active males.