View clinical trials related to Aging.
Filter by:The purpose of this study is to understand why and how oxidative stress negatively impacts mobility in the elderly, and to determine whether antioxidant supplements can increase vascular health and mobility.
Endothelial Progenitor Cells (EPCs) are circulating cells released from bone marrow which are important for maintaining cardiovascular health. The prevalence of cardiovascular disease in older adults is associated with reduced circulating EPC numbers. Studies have shown reduced EPC number and function in old vs. young individuals, and endurance exercise training increases EPC number and function in young adults. Oxidative stress adversely affects endothelial cells and preliminary evidence indicates that oxidative stress negatively affects EPC function. Conversely, regular exercise reduces markers of oxidative stress and may enhance EPC function in older adults. The investigators hypothesize that older endurance-trained athletes and matched sedentary individuals will have markedly divergent EPC function and that altering the physical activity levels of both groups will move them to intermediate points between these two extremes. The investigators also propose that the investigators can "mimic" the effect of exercise training on EPC function in cell culture by altering intracellular levels of a key enzyme and a signaling molecule which the investigators have shown to regulate EPC function with respect to exercise training in young individuals.
Resistance training as well as creatine supplementation may be beneficial for cognitive function, such as memory and attention. Therefore, the investigators speculate that resistance training combined with creatine supplementation would promote additive benefits on cognitive function in elderly women.
Healthy older adults with self-reported cognitive difficulties who receive strategy training will demonstrate greater performance benefits on measures of real-world activities, relative to those receiving a control intervention, immediately post treatment and at follow-up.
Dietary intervention to prevent sarcopenia in elderly people. The objective of this study is to test whether meat structure plays an important role in protein digestion, to maximise the amino acid availability and to stimulate the muscle protein growth in elderly people.
Study to demonstrate that the Bone UltraSonic Scanner (BUSS) can aid in detection of osteoporosis and predict prevalent osteoporotic fractures. Measurements derived from the BUSS parameters will be able to discriminate between postmenopausal women with osteoporotic fractures when compared to matched controls without history of osteoporotic fracture.
Cognitive aging and cognitive decline are important public health concerns in an aging US population. The investigators will conduct a randomized controlled trail among healthy older adults to assess effects of several innovative activities on remediation of age-related cognitive decline.
The purpose of this study is to determine if taking the pain reliever acetaminophen (ACET) interferes with some of the benefits of weight lifting on muscles and bone density in older men.
Based upon promising results from a pilot study among 424 sedentary older adults who were randomized to a physical activity intervention or a successful aging health education intervention, a Phase 3 multi-center randomized controlled trial is being conducted to compare a moderate-intensity physical activity program to a successful aging health education program in 1,600 sedentary older adults who are followed for an average of 2.7 years. The primary aim was to assess the long-term effects of the proposed interventions on the primary outcome of major mobility disability, defined as inability to walk 400 m.
This is a pilot study funded by the National Institutes of Health. In this project, we will investigate the potential effect of skeletal muscle nitric oxide (NO) production on muscle strength and physical function in older individuals. We propose to test a new method that may enable simultaneous determination of both vascular and skeletal muscle NO production for the first time in humans. Further, we will determine whether augmentation of NO-mediated responses, by administration of sildenafil citrate (Viagra), reduces fatigue and fatigability in older individuals.