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https://www.readbyqxmd.com/read/28204901/the-effect-of-hydration-status-on-the-measurement-of-lean-tissue-mass-by-dual-energy-x-ray-absorptiometry
#1
Clodagh M Toomey, William G McCormack, Phil Jakeman
PURPOSE: Athletes cycle between exercise and recovery. Exercise invokes changes in total body water from thermal sweating, muscle and hepatic glycogen depletion and metabolic water loss. Recovery from exercise results in rehydration, substrate repletion, and possible glycogen supercompensation. Such changes may corrupt the measurement of hydrated tissues, such as lean tissue mass (LTM), by dual-energy X-ray absorptiometry (DXA). The purpose of this study was to determine the effect of exercise and thermal dehydration and subsequent glycogen supercompensation on DXA-based measurement of body composition...
February 16, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28151909/incidence-and-risk-factors-of-adjacent-segment-disease-following-posterior-decompression-and-instrumented-fusion-for-degenerative-lumbar-disorders
#2
Hui Wang, Lei Ma, Dalong Yang, Tao Wang, Sen Liu, Sidong Yang, Wenyuan Ding
The purpose of this study was to explore incidence and risk factors of adjacent segment disease (ASD) following posterior decompression and instrumented fusion for degenerative lumbar disorders, and hope to provide references in decision making and surgical planning for both spinal surgeon and surgically treated patients.By retrieving the medical records from January 2011 to December 2013 in our hospital, 237 patients were retrospectively reviewed. According to the occurrence of ASD at follow up, patients were divided into 2 groups: ASD and N-ASD group...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28148680/the-plasma-proteome-is-associated-with-anthropometric-status-of-undernourished-nepalese-school-aged-children
#3
Sun Eun Lee, Christine P Stewart, Kerry J Schulze, Robert N Cole, Lee S-F Wu, James D Yager, John D Groopman, Subarna K Khatry, Ramesh Kant Adhikari, Parul Christian, Keith P West
BACKGROUND: Malnutrition affects body growth, size, and composition of children. Yet, few functional biomarkers are known to be associated with childhood morphology. OBJECTIVE: This cross-sectional study examined associations of anthropometric indicators of height, musculature, and fat mass with plasma proteins by using proteomics in a population cohort of school-aged Nepalese children. METHODS: Height, weight, midupper arm circumference (MUAC), triceps and subscapular skinfolds, upper arm muscle area (AMA), and arm fat area (AFA) were assessed in 500 children 6-8 y of age...
February 1, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28104539/whole-body-vibration-of-mice-induces-progressive-degeneration-of-intervertebral-discs-associated-with-increased-expression-of-il-1%C3%AE-and-multiple-matrix-degrading-enzymes
#4
M R McCann, M Veras, C Yeung, G Lalli, P Patel, K M Leitch, D W Holdsworth, S J Dixon, C A Séguin
OBJECTIVE: Whole-body vibration (WBV) is a popular fitness trend based on claims of increased muscle mass, weight loss and reduced joint pain. Following its original implementation as a treatment to increase bone mass in patients with osteoporosis, WBV has been incorporated into clinical practice for musculoskeletal disorders, including back pain. However, our recent studies revealed damaging effects of WBV on joint health in a murine model. In this report, we examined potential mechanisms underlying disc degeneration following exposure of mice to WBV...
January 16, 2017: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/28094240/ectopic-bone-formation-by-gel-derived-bioactive-glass-poly-l-lactide-co-glycolide-composites-in-a-rabbit-muscle-model
#5
Joanna Filipowska, Katarzyna Cholewa-Kowalska, Jarosław Wieczorek, Danuta Semik, Zbigniew Dąbrowski, Maria Łączka, Anna M Osyczka
In this study we aimed to assess the in vivo osteoinductive properties of two composite scaffolds made of PLGA (poly-L-lactide-co-glycolide) and two types of gel-derived bioactive glasses, namely a high silica S2 bioactive glass (S2-PLGA composites) or high lime A2 bioactive glass (A2-PLGA composites). To achieve that, the potential of the composites to induce ectopic bone formation in a rabbit muscle has been examined along with the control PLGA scaffold. Cylinder-like scaffolds of 7  ×  3 mm (width  ×  height) were implanted into pouches created in the latissimus dorsi muscle of 18 New Zealand rabbits...
January 17, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28050921/influence-of-dietary-acid-load-on-exercise-performance
#6
Catherine Applegate, Mackenzie Mueller, Krystle E Zuniga
Diet composition can affect systemic pH and acid-base regulation, which may in turn influence exercise performance. An acidic environment in the muscle impairs performance and contributes to fatigue; therefore, current trends in sports nutrition place importance on maximizing the alkalinity of the body with ergogenic aids and dietary strategies. This review examines the evidence on the effects of dietary manipulations on acid load and exercise performance. Ten studies that investigated the effect of high versus low dietary acid loads on athletic performance generally identified that low dietary acid loads increased plasma pH, but did not consistently improve exercise performance at maximal or submaximal exercise intensities...
January 4, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28039045/impact-of-age-gender-and-body-composition-on-bone-quality-in-an-adult-population-from-the-middle-areas-of-china
#7
Zenghui Ding, Yanyan Chen, Yang Xu, Xu Zhou, Yubing Xu, Zuchang Ma, Yining Sun
Identifying modifiable factors that influence bone status during adulthood to maximize bone quality is a potential primary strategy in the prevention of osteoporosis in later life. We investigated the impact of body height, body weight, body mass index, and body composition on calcaneal bone characteristics as measured with quantitative ultrasound in 441 Chinese adults (238 women) aged 20-55 yr from the middle areas of China. Body composition, including fat-free mass (FFM), muscle mass, and fat mass were obtained by bioelectrical impedance analysis...
December 27, 2016: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28001453/insulin-resistance-is-associated-with-smaller-cortical-bone-size-in-non-diabetic-men-at-the-age-of-peak-bone-mass
#8
Charlotte Verroken, Hans-Georg Zmierczak, Stefan Goemaere, Jean-Marc Kaufman, Bruno Lapauw
CONTEXT: In type 2 diabetes mellitus, fracture risk is increased despite preserved areal bone mineral density. Although this apparent paradox may in part be explained by insulin resistance affecting bone structure and/or material properties, few studies have investigated the association between insulin resistance and bone geometry. OBJECTIVE: We aimed to explore this association in a cohort of non-diabetic men at the age of peak bone mass. DESIGN, SETTING AND PARTICIPANTS: 996 non-diabetic men aged 25-45 years were recruited in a cross-sectional, population-based sibling-pair study at a university research center...
December 21, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27999850/omega-3-fatty-acids-and-vitamin-d-in-immobilisation-part-a-modulation-of-appendicular-mass-content-composition-and-structure
#9
E L Bostock, C I Morse, K Winwood, I M McEwan, G L Onambélé
OBJECTIVES: Muscle size decreases in response to short-term limb immobilisation. This study set out to determine whether two potential protein-sparing modulators (eicosapentaenoic acid and vitamin D) would attenuate immobilisation-induced changes in muscle characteristics. DESIGN: The study used a randomised, double-blind, placebo-controlled design. SETTING: The study took part in a laboratory setting. PARTICIPANTS: Twenty-four male and female healthy participants, aged 23...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/27992397/adaptations-with-intermittent-exercise-training-in-post-and-premenopausal-women
#10
Kåre Seidelin, Michael Nyberg, Peter Piil, Niklas Rye Jørgensen, Ylva Hellsten, Jens Bangsbo
INTRODUCTION: The purposes of the present study was to examine the effect of intermittent exercise training on musculoskeletal and metabolic health in postmenopausal (PM) and premenopausal (PRM) women and, furthermore, to evaluate whether the adaptations can be maintained with a reduced training frequency. METHODS: Eighteen PM (51 ± 1 yr, mean ± SEM) and 12 PRM (48 ± 1 yr) women participated in floorball training approximately two times per week for 12 wk. In a subgroup (n = 9) of PM women (PM40), exercise training was performed for an additional 40 wk with a reduced training frequency of approximately one training session per week...
January 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27989649/muscle-mass-is-associated-with-incident-fracture-in-postmenopausal-women-the-ofely-study
#11
E Sornay-Rendu, F Duboeuf, S Boutroy, R D Chapurlat
The relationships between body composition and bone mineral density are well established but the contribution of body composition to the risk of fracture (Fx) has rarely been evaluated prospectively. We analyzed the risk of Fx by body composition in 595 postmenopausal women (mean age 66±8years) from a longitudinal cohort study (Os des Femmes de Lyon). We assessed the risk of the first incident fragility Fx according to body composition obtained from whole-body DXA: abdominal visceral (VFAT) and subcutaneous fat mass (SFAT), total body fat mass (FM), lean mass index (LMI) and appendicular skeletal muscle mass index (ASMI)...
October 27, 2016: Bone
https://www.readbyqxmd.com/read/27976618/relationship-between-body-composition-and-bone-mineral-density-related-to-physical-activity-in-elderly-women
#12
Muriel Levesque, Marie Ndangang, Typhaine Riaudel, Laure de Decker, Jacques Benichou, Gilles Berrut
Changes in body composition, including a decrease in muscle and bone mass, accompany aging. Analyse the influence of lean mass on bone mineral density, related to physical activity, in elderly women. 37 women were included in this study via an osteoporosis consultation. Body composition and bone mineral density (BMD) measurements were performed using Dual-energy X-ray absorptiometry methodology (DXA). The BMD was measured at the femoral neck. Each participant had a physical activity test to respond and had to perform handgrip, a four meter walk and one leg balance...
December 1, 2016: Gériatrie et Psychologie Neuropsychiatrie du Vieillissement
https://www.readbyqxmd.com/read/27973679/effect-on-body-composition-and-bone-mineral-density-of-walking-with-a-robotic-exoskeleton-in-adults-with-chronic-spinal-cord-injury
#13
Antony D Karelis, Lívia Pinheiro Carvalho, Manuel Jose Castillo, Dany H Gagnon, Mylène Aubertin-Leheudre
OBJECTIVE: To examine the effect on body composition and bone mineral density of locomotor training using a robotic exoskeleton in individuals with spinal cord injury. STUDY DESIGN: Interventional study. SUBJECTS/METHODS: Five adults with a non-progressive traumatic complete sensorimotor spinal cord injury who were using a wheelchair as a primary mode of mobility. Participants performed a personalized 6-week progressive locomotor training programme using a robotic exoskeleton 3 times/week for up to 60 min...
January 19, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/27965943/bone-mineral-density-and-fatty-degeneration-of-thigh-muscles-measured-by-computed-tomography-in-hip-fracture-patients
#14
Myung Hoon Hahn, Ye-Yeon Won
BACKGROUND: Recently, as an independent fracture factor from Bone mineral density (BMD), muscle weakness due to the fatty degeneration of thigh muscles have been attracting attentions as causes of hip fracture. The purpose of this study is to investigate the correlation between the body composition and BMD and fatty degeneration of thigh muscles of the female patients over 65 years old with osteoporotic hip fracture. METHODS: This study was conducted with 178 female osteoporotic hip fracture patients...
November 2016: Journal of Bone Metabolism
https://www.readbyqxmd.com/read/27958252/comparison-of-the-body-compositions-in-obese-and-nonobese-individuals-can-learning-body-compositions-motivate-losing-weight
#15
R Kutlu, F G Cihan
BACKGROUND: Obesity is one of the leading preventable causes of death worldwide. OBJECTIVE: To compare body compositions in obese and nonobese individuals. METHODS: This cross-sectional study constituted of 428 individuals. Body compositions were determined using the Tanita. RESULTS: Of all the participants, 300 (70.1%) were female. The prevalence of overweight and obesity was 30.8% and 47.7%, respectively. Having low educational level, female gender, not working, being married, and nonsmoker significantly increased more in obese than nonobese (P < 0...
January 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/27942207/effects-of-short-term-nordic-walking-training-on-sarcopenia-related-parameters-in-women-with-low-bone-mass-a-preliminary-study
#16
Zbigniew Marcin Ossowski, Wojciech Skrobot, Piotr Aschenbrenner, Vida Janina Cesnaitiene, Mirosław Smaruj
BACKGROUND: Several studies have demonstrated the positive effects of physical activity on skeletal muscle mass and muscle strength in women with osteoporosis. However, the impact of Nordic walking training on sarcopenia-related parameters in women with low bone mass remains unknown. Therefore, the purpose of this study was to evaluate the impact of 12 weeks of Nordic walking training on skeletal muscle index, muscle strength, functional mobility, and functional performance in women with low bone mass...
2016: Clinical Interventions in Aging
https://www.readbyqxmd.com/read/27940620/how-to-build-a-deep-diver-the-extreme-morphology-of-mesoplodonts
#17
D Ann Pabst, William A McLellan, Sentiel A Rommel
Mesoplodont beaked whales are extreme divers, diving for over 45 mins and to depths of over 800 m. These dives are of similar depth and duration to those of the giant sperm whale (Physeter macrocephalus) whose body mass can be 50 times larger. Velten et al. (2013) provided anatomical data that demonstrated that on-board oxygen stores were sufficient to aerobically support the extreme dives of mesoplodonts if their diving metabolic rates are low. Because no physiological data yet exist, we utilized an anatomical approach-the body composition technique-to examine the relative metabolic rates of mesoplodonts...
December 2016: Integrative and Comparative Biology
https://www.readbyqxmd.com/read/27922938/skeletal-muscle-mass-is-associated-with-higher-dietary-protein-intake-and-lower-body-fat-in-postmenopausal-women-a-cross-sectional-study
#18
Thaís R Silva, Poli M Spritzer
OBJECTIVE: We investigated the association between skeletal muscle mass and dietary protein intake, habitual physical activity, body composition, and metabolic variables. METHODS: One hundred three healthy postmenopausal women from southern Brazil (age 55.2 ± 4.9 y, body mass index 27.2 ± 4.6 kg/m) were enrolled. Bone mineral density, %body fat, %trunk fat mass, and appendicular lean mass were assessed by dual-energy x-ray absorptiometry, resting metabolic rate by indirect calorimetry, and habitual physical activity by pedometer...
December 5, 2016: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27898642/manipulation-of-muscle-creatine-and-glycogen-changes-dxa-estimates-of-body-composition
#19
Julia L Bone, Megan L Ross, Kristyen A Tomcik, Nikki A Jeacocke, Will G Hopkins, Louise M Burke
: Standardising a dual x-ray absorptiometry (DXA) protocol is thought to provide a reliable measurement of body composition. PURPOSE: We investigated the effects of manipulating muscle glycogen and creatine content independently and additively on DXA estimates of lean mass. METHOD: Eighteen well-trained male cyclists undertook a parallel group application of creatine loading (n=9) (20 g/d for 5 d loading; 3 g/d maintenance) or placebo (n=9) with crossover application of glycogen loading (12 v 6 g/kg BM/d for 48 h) as part of a larger study involving a glycogen-depleting exercise protocol...
November 28, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27897409/association-of-serum-vitamin-d-with-osteosarcopenic-obesity-korea-national-health-and-nutrition-examination-survey-2008-2010
#20
Jinhee Kim, Yunhwan Lee, Seunghee Kye, Yoon-Sok Chung, Okhee Lee
BACKGROUND: Serum vitamin D levels have been reported to be associated with individual components of body composition. However, the relationship between serum vitamin D and combined indices of adverse body composition is largely unknown. This cross-sectional study examined the association between serum vitamin D and osteosarcopenic obesity in a nationally representative sample of middle-aged and older adults. METHODS: We analysed the Korea National Health and Nutrition Examination Surveys (IV and V) conducted in 2008-2010, consisting of 5908 (2485 men, 3423 women) aged ≥ 50 years...
October 5, 2016: Journal of Cachexia, Sarcopenia and Muscle
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