Effect Of Isokinetic Strength Training And Deconditioning On Bone Stiffness Bone Density And Bone Turnover In Military Aged Women
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| Total Pages | : 0 |
| Release | : 2001 |
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For physically active military personnel, stress fractures are debilitating and costly. Female soldiers sustain twice the number of stress fractures compared to males. Exercise interventions for women are needed to promote military readiness in ways that enhance bone strength and reduce stress fractures. This study, currently in progress, is investigating the effects of 30 weeks of concentric Vs eccentric isokinetic resistance training on bone stiffness (mechanical impedance), quality (mineral density and content), and bone cell activity (biomarkers of turnover). Female volunteers (N = 120), 18-26 years of age are categorized into normal bone density (NBD, n = 60) and low bone density (LBD, n = 60) subgroups, based on whole body bone density measurements. Subjects then are randomly assigned within NBD and LBD subgroups for concentric (n = 30 LBD, a = 30 NBD) and eccentric (n = 30 LBD, n = 30 NBD) exercise training. Exercises are performed using non-dominant arms and legs, leaving dominant limbs as self-controls. Results of this study will enhance understandings of effects of specialized exercise training on bone adaptations among young adult females. This work has important implications for reducing stress fractures arising from combat-readiness activities and for preventing osteoporosis in women.
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| Total Pages | : 58 |
| Release | : 2002 |
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For physically active military personnel, stress fractures are debilitating and costly. Female soldiers sustain twice the number of stress fractures compared to males. Exercise interventions for women are needed to promote military readiness in ways that enhance bone strength and reduce stress fractures. This study, currently in progress, is investigating the effects of 30 weeks of concentric Vs eccentric isokinetic resistance training on bone stiffness (mechanical impedance), bone quality (mineral density and content), and bone cell activity (biomarkers of turnover). Female volunteers (N = 120), 18-26 years of age have been categorized into normal bone density (NBD, N = 60) and low bone density (LBD, N = 60) subgroups, based on whole body bone density measurements. Subjects subsequently have been randomly assigned within NBD and LBD subgroups for either concentric (n = 30 LBD, n = 30 NBD) and eccentric (N = 30 LBD, N = 30 NBD) isokinetic exercise training. Exercises are performed using non-dominant arms and legs only, leaving dominant limbs as self-controls Results of this study will enhance understandings of effects of specialized isokinetic resistance exercise training on bone adaptations among young adult females. This work has important implications for reducing stress fractures arising from combat- readiness activities in women and their risks for future osteoporosis.
| Author | : Subcommittee on Body Composition, Nutrition, and Health of Military Women |
| Publisher | : National Academies Press |
| Total Pages | : 132 |
| Release | : 1998-10-06 |
| Genre | : Medical |
| ISBN | : 0309591899 |
The incidence of stress fractures of the lower extremities during U.S. military basic training is significantly higher among female military recruits than among male recruits. The prevalence of this injury has a marked impact on the health of service personnel and imposes a significant financial burden on the military by delaying completion of the training of new recruits. In addition to lengthening training time, increasing program costs, and delaying military readiness, stress fractures may share their etiology with the longer-term risk of osteoporosis. As part of the Defense Women's Health Research Program, this book evaluates the impact of diet, genetic predisposition, and physical activity on bone mineral and calcium status in young servicewomen. It makes recommendations for reducing stress fractures and improving overall bone health through nutrition education and monitored physical training programs. The book also makes recommendations for future research to evaluate more fully the effects of fitness levels, physical activities, and other factors on stress fracture risk and bone health.
| Author | : Leslie Anne Pruitt |
| Publisher | : |
| Total Pages | : 452 |
| Release | : 1989 |
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| Author | : Alice Jean Smith |
| Publisher | : |
| Total Pages | : 232 |
| Release | : 1992 |
| Genre | : Bone densitometry |
| ISBN | : |
| Author | : Haley Frances Terndrup |
| Publisher | : |
| Total Pages | : 109 |
| Release | : 2016 |
| Genre | : Biochemical markers |
| ISBN | : |
Current options for maintaining or slowing aging-related bone mineral density (BMD) loss in postmenopausal women primarily include pharmaceutical agents. More recently, physical activity and exercise have been suggested as highly effective, low cost alternatives. Weighted aerobic exercise, utilizing load carriage systems (LCS), is known to increase the gravitational forces impacting bone, creating a higher osteogenic stimulus than standard aerobic exercise. In response to the positive research on aerobic exercise with well-designed LCS, Dr. Lawrence Petrakis, MD, developed a unique 5.44 kg uniformly weighted exercise suit. This study aimed to examine the effects of the uniformly weighted exercise suit on serum biochemical markers of bone formation (Amino- Propeptide of Type 1 Collagen [P1NP]; Carboxy-Terminal Propeptide of Type 1 Collagen [P1CP] and resorption (Carboxy-Terminal Telopeptide of Type 1 Collagen [CTX]) in response to submaximal aerobic exercise in postmenopausal women with low bone density. Nine volunteer, sedentary to lightly active, healthy postmenopausal women (Age: 58.7±1.1 years, BMI: 28.2±1.0, BMD T-score: -1.2±0.5) participated in this within-subjects study, wherein each participant exercised under two counterbalanced conditions (aerobic exercise with [ES] or without [NS] the exercise suit). During each condition, participants walked on a treadmill at 65%-75% of their age-predicted maximum heart rate until they reached their goal caloric expenditure (400kcal). There was a seven-day washout period between sessions. Serum was processed using ELISA protocols to investigate the change in biomarker at 24 and 72 hours post exercise, relative to baseline. The results indicated, when compared to the NS condition, the ES condition elicited a greater positive change in P1CP at 24 hours (Phours following exercise (P0.05). There was no effect of condition on P1NP at any time point (P>0.05). In sum, submaximal aerobic exercise while wearing the uniformly weighted exercise suit elicited an antiresorptive effect on bone collagen resorption with a simultaneous increase in bone collagen formation 24 hours post exercise.
| Author | : Timothy Martin Dornemann |
| Publisher | : |
| Total Pages | : 166 |
| Release | : 1994 |
| Genre | : Body composition |
| ISBN | : |
| Author | : Elizabeth M. Watson |
| Publisher | : |
| Total Pages | : 81 |
| Release | : 2001-04-01 |
| Genre | : |
| ISBN | : 9781423523581 |
Osteoporosis is a condition involving decreased bone mineral density (BMD) and increased fragility of the skeletal system. Osteoporosis affects ^75 million individuals in the United States, Europe, and Japan. In the United States alone, hip fractures affect 500,000 individuals per year, and annual healthcare costs for osteoporotic fractures are approximately $l4 billion. A high peak BMD can prevent or delay the onset of osteoporosis and its complications. Exercise and diet may affect peak BMD by as much as 20 to 40% each and have been identified as the two most important controllable factors determining BMD. The current study investigated the effect of a calcium, vitamin D, and vitamin K supplement combination during initial military cadet exercise training on: BMD, stress fracture occurrence, hormones associated with BMD, and biochemical markers of bone turnover. Significant changes in BMD, either between the supplemented group or the unsupplemented group or across time for both groups were not found. The majority of participants (n = 22) had unexpectedly high levels of physical activity prior to enrollment, and the initial military exercise training program included only moderate levels of activity. Therefore, the exercise stimulus to bone was likely insufficient to promote gains in BMD, regardless of the nutrient supplement status. Serum insulin-like growth factor-I and osteocalcin significantly increased over time (p
| Author | : Government Publishing Office |
| Publisher | : Government Printing Office |
| Total Pages | : 154 |
| Release | : 2014-12-15 |
| Genre | : |
| ISBN | : 9780160926297 |
Human Adaptation to Spaceflight: The Role of Nutrition reflects a (brief) review of the history of and current state of knowledge about the role of nutrition in human space flight. We have attempted to morganize this from a more physiological point of view, and to highlight systems, and the nutrients that support them, rather than the other way around. We hope we have captured in this book the state of the field of study of the role of human nutrition in space flight, along with the work leading up to this state, and some guideposts for work remaining to be done and gaps that need to be filled. NOTE: NO FURTHER DISCOUNTS FOR ALREADY REDUCED SALE ITEMS.
| Author | : Helge Hebestreit |
| Publisher | : John Wiley & Sons |
| Total Pages | : 512 |
| Release | : 2008-04-30 |
| Genre | : Medical |
| ISBN | : 0470695501 |
This essential new volume in the Encyclopaedia of Sports Medicine series, published under the auspices of the International Olympic Committee, provides a thorough overview of the unique physiologic characteristics, responsiveness to training, and possible health hazards involved in the training, coaching, and medical care of young athletes. Intense involvement in competitive sports often begins during childhood. During adolescence, many athletes reach their peak performance and some may participate in World Championships and Olympic Games at a relatively young age. The Young Athlete presents the available information relevant to exercise and training in youth, reviewed and summarized by authors who are recognized as leaders in their respective fields. The Young Athlete is subdivided into seven parts covering: the physiologic bases of physical performance in view of growth and development; trainability and the consequences of a high level of physical activity during childhood and adolescence for future health; the epidemiology of injuries, their prevention, treatment, and rehabilitation; non-orthopedic health concerns including the pre-participation examination; psychosocial issues relevant to young athletes; diseases relevant to child and adolescent athletes; the methodology relevant to the assessment of young athletes. This valuable reference summarizes a large database of information from thousands of studies and is especially relevant to sports physicians, pediatricians, general practitioners, physical therapists, dietitians, coaches, students, and researchers in the exercise sciences.
