View clinical trials related to Bone Density.
Filter by:The number of turf fields has experienced an important increase in public and private facilities during the last years. This artificial surface will be predominant in any soccer field in the next years. Among turf fields there are many different types depending on their construction characteristics (with and without asphalted base, elastic base, rubber filling, etc.). Officially all types of artificial turfs should have similar stability and impact absorption characteristics. On the other hand there is a great variety of soccer-boots, especially for youth soccer players, similar to the football stars. Many evidences support the fact that when a person exercises many different type of impacts-stimulus are necessary in order to stimulate bone and skeletal muscle systems. However, it is not known yet whether this effect can be extended or shortened depending on the type of artificial surface and soccer-boots used, or even more whether it could be more or less dangerous and/or provoke injuries/disagreement among the users. Little information is available in youth soccer player pointing in the same direction but still controversial. Furthermore, bone strength do not only depends on bone mass but on bone structure and microarchitecture. The cross sectional area, cortex thickness or trabecular density are important aspects of bone health. There are few studies on the effect of interaction between turf field and soccer boots on bone architecture of youth soccer players. This information is relevant for present and future health of adolescents practicing football and for all the organizations promoting this sport. Due to the fact that turf fields are preferentially used by youth populations, it is important to know the real effects of the interaction between of different type of artificial surfaces and soccer boots on children bone mass development. Nowadays, there are no data and/or defined guidelines that can answer those unresolved questions, thus the main aim of the present project is to identify which turf field and soccer boots are the most adequate to optimize the acquisitions of bone mass in children soccer players.
The VITamin D and OmegA-3 TriaL (VITAL; NCT 01169259) is a randomized clinical trial in 25,871 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or fish oil (1 gram of omega-3 fatty acids) reduces the risk of developing cancer, heart disease, and stroke in people who do not have a prior history of these illnesses. This ancillary study is being conducted among a sub-cohort of 771 participants in VITAL and will test the efficacy and safety of high-dose vitamin D supplementation vs. placebo on skeletal health and body composition.
To examine the impact of a structured physical activity program focused on bone strength in elementary school children in the framework of their physical education classes on: 1. Bone strength of children participating in the activity. 2. Physical variables and psycho-motor capabilities: vertical jumping strength, horizontal jumping strength, static balance, dynamic balance and coordination.
Dual-energy x-ray absorptiometry (DXA) is currently the most widely used tool for determining bone density. However, most experts consider DXA an imperfect and intermediate technology. DXA is subject to artifact from arthritis and body composition, and also cannot account for geometric or material properties of bone which are also important components of bone strength. Xtreme CT (high-resolution peripheral quantitative computed tomography, HR-pQCT) is a new technology with dramatically improved spatial resolution. It is able to define bones' cortical and trabecular surfaces in a three-dimensional manner, and therefore provides information on bone microarchitecture as well as bone density. As such, it may provide new information about characteristics of bone strength. The purpose of this study is to compare Xtreme CT to DXA measurements of bone density, and also to generate a normative database of healthy young adults. This cross-sectional study involves a single visit where both Xtreme CT and DXA measurements will be obtained for a single time-point. This normative database will allow us to generate clinically relevant comparisons between the two imaging technologies.
Bone density was found to be impaired among lage babies and infants of diabetic mothers as found in small group studies. The assumption is that large weight decreases fetal movements and causes decreased bone mineralization.The aim of the study is to compare 2 study groups - of large infants and infants of diabetic mothers to each other and to controls.
This study examines the role of energy availability on menstrual function and bone mass in female adolescent endurance athletes. Specific evaluations include dietary intake, exercise energy expenditure, training schedules, menstrual function and bone density.
The purpose of this study is to evaluate whether alendronate and alfacalcidol are effective on prosthetic or lumbar spine BMD after total hip arthroplasty.
In 2003, observational growth and bone density data was obtained on children with cerebral palsy (CP) living at Hattie Larlham as part of a study comparing growth with an existing database of children with CP who live at home. The original residents included in that study are now of adult age. Due to the lack of longitudinal bone density measurements in facility-based adults with severe CP, the investigators' objective is to obtain 6-year follow-up data from the residents enrolled in the original study.
The objective of this study is to assess changes bone mineral density and bone metabolism after laparoscopic Roux-en-Y gastric bypass surgery. The investigators hypothesize that weight loss after laparoscopic Roux-en-Y gastric bypass surgery will be associated with increased bone turnover, changes in bone metabolism, and loss of bone mass.
We will prospectively study 2 groups of diabetic patients treated with pioglitazone or placebo for 26 weeks. Bone marrow aspirates will be obtained from these patients at baseline and after 26 weeks of treatment, and hBMCs will be isolated from these bone marrow aspirations. The ability of hBMCs to differentiate into osteoblast and adipocytes lineages will be compared before and after treatment with pioglitazone and compared to placebo. In parallel, clinical markers of bone formation and resorption as well as bone mineral density will be assessed before and after 26 weeks of treatment. Primary endpoint for this study will be detection of change in number of osteoblasts or adipocytes from cultured hBMCs between study groups and within each group.