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https://www.readbyqxmd.com/read/28410328/manipulation-of-muscle-creatine-and-glycogen-changes-dual-x-ray-absorptiometry-estimates-of-body-composition
#1
Julia L Bone, Megan L Ross, Kristyen A Tomcik, Nikki A Jeacocke, Will G Hopkins, Louise M Burke
Standardizing 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 per day for 48 h) as part of a larger study involving a glycogen-depleting exercise protocol...
May 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28394825/body-composition-assessment-in-the-prediction-of-osteoporotic-fractures
#2
Mélany Hars, Andrea Trombetti
PURPOSE OF REVIEW: To give an overview of recent research findings and insights on the role of body composition assessment in fracture risk prediction. RECENT FINDINGS: While there is to date little doubt that bone mineral density (BMD) is a main pathogenic factor of osteoporotic fractures, recent studies have emphasized the independent contribution of body composition components, especially lean mass, to fracture risk. In this article, we address body composition changes with aging, before to focus on recent studies addressing the contribution of lean and fat mass to fracture risk, together with some hypothesized mechanisms and clinical implications...
April 7, 2017: Current Opinion in Rheumatology
https://www.readbyqxmd.com/read/28351218/association-among-serum-igf-1-frailty-muscle-mass-bone-mineral-density-and-physical-performance-among-community-dwelling-middle-aged-and-older-adults-in-taiwan
#3
Liang-Yu Chen, Yi-Hui Wu, Li-Kuo Liu, Wei-Ju Lee, An-Chun Hwang, Li-Ning Peng, Ming-Hsien Lin, Liang-Kung Chen
BACKGROUND: Aging is featured by the complex interrelationship between among body composition, frailty status and physical performance. The main aim of this study was to evaluate the association between among serum insulin-like growth factor-1 (IGF-1), body composition, and physical function among community-dwelling middle-aged and elderly population in Taiwan. METHODS: We conducted a cross-sectional study by using the data of I-Lan Longitudinal Aging Study (ILAS), which recruited a total of 1,833 community-dwelling people aged 50 years and older...
March 29, 2017: Rejuvenation Research
https://www.readbyqxmd.com/read/28331906/associations-between-sarcopenia-and-degenerative-lumbar-scoliosis-in-older-women
#4
Yawara Eguchi, Munetaka Suzuki, Hajime Yamanaka, Hiroshi Tamai, Tatsuya Kobayashi, Sumihisa Orita, Kazuyo Yamauchi, Miyako Suzuki, Kazuhide Inage, Kazuki Fujimoto, Hirohito Kanamoto, Koki Abe, Yasuchika Aoki, Tomoaki Toyone, Tomoyuki Ozawa, Kazuhisa Takahashi, Seiji Ohtori
BACKGROUND: Age-related sarcopenia can cause various forms of physical disabilities. We investigated how sarcopenia affects degenerative lumbar scoliosis (DLS) and lumbar spinal canal stenosis (LSCS). METHODS: Subjects comprised 40 elderly women (mean age 74 years) with spinal disease whose chief complaints were low back pain and lower limb pain. They included 15 cases of DLS (mean 74.8 years) and 25 cases of LSCS (mean age 72.9 years). We performed whole-body dual-energy X-ray absorptiometry (DXA) to analyze body composition, including appendicular and trunk skeletal muscle mass index (SMI; lean mass (kg)/height (m)(2)) and bone mineral density (BMD)...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/28331805/prevotella-osteomyelitis-after-dental-capping-procedure
#5
Alexander Williams, Thomas Kerkering
We present a 49 year old man who presented to the emergency department with severe lower back pain of 5 days duration. One week prior he had been diagnosed with a right psoas muscle abscess and was discharged with a 28 day course of moxifloxacin after the preliminary culture from the psoas grew an anaerobic organism. MRI of the lumbar spine showed marrow edema in the L2 body, occupying most of the anterior two thirds of the body, with cortical erosion at the anteroinferior aspect of L1. Blood cultures were negative and bone biopsy of L2 showed neutrophilic invasion and reactive changes...
2017: IDCases
https://www.readbyqxmd.com/read/28285470/the-effect-of-a-muscle-weight-bearing-and-aerobic-exercise-program-on-the-body-composition-muscular-strength-biochemical-markers-and-bone-mass-of-obese-patients-who-have-undergone-gastric-bypass-surgery
#6
Luciana Campanha-Versiani, Danielle Aparecida Gomes Pereira, Giane Amorim Ribeiro-Samora, Adauto Versiani Ramos, Maria Fatima H de Sander Diniz, Luiz Armando De Marco, Maria Marta Sarquis Soares
BACKGROUND: The effect of an exercise program on the body composition, muscular strength (MS), biochemical markers, and bone mineral density (BMD) of individuals undergoing gastric bypass is unclear. We assessed lean mass (LM), MS, bone remodeling markers, and BMD before and after supervised weight-bearing and aerobic exercise training in obese patients who underwent Roux-en-Y gastric bypass (RYGB). METHODS: This study included 37 obese patients (81.1% women, mean age 38...
March 11, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28284666/anthropometric-and-biomechanical-characteristics-of-body-segments-in-persons-with-spinal-cord-injury
#7
Y Fang, L R Morse, N Nguyen, N G Tsantes, K L Troy
People with spinal cord injury (SCI) experience bone and muscle loss in their paralyzed limbs that is most rapid and severe in the first 3years after injury. Restoration of mechanical loading through therapeutic physical activity may potentially slow or reverse post-SCI bone loss, however, therapeutic targets cannot be developed without accurate biomechanical models. Obesity is prevalent among SCI population, and it alters body composition and further affects parameters of these models. Here, clinical whole body dual-energy X-ray absorptiometry data from people with acute (n=39) and chronic (n=61) SCI were analyzed to obtain anthropometric parameters including segment masses, center of mass location, and radius of gyration for both obese and non-obese individuals...
April 11, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28271457/insulin-growth-factor-1-correlates-with-higher-bone-mineral-density-and-lower-inflammation-status-in-obese-adult-subjects
#8
Rachele Fornari, Chiara Marocco, Davide Francomano, Simona Fittipaldi, Carla Lubrano, Viviana M Bimonte, Lorenzo M Donini, Emanuele Nicolai, Antonio Aversa, Andrea Lenzi, Emanuela A Greco, Silvia Migliaccio
PURPOSE: Obesity is a severe public health problem worldwide, leading to an insulin-resistant state in liver, adipose, and muscle tissue, representing a risk factor for type 2 diabetes mellitus, cardiovascular diseases, and cancer. We have shown that abdominal obesity is associated with homeostasis derangement, linked to several hormonal and paracrine factors. Data regarding potential link between GH/IGF1 axis, bone mineral density, and inflammation in obesity are lacking. Thus, aim of this study was to evaluate correlation among IGF-1, BMD, and inflammation in obese individuals...
March 7, 2017: Eating and Weight Disorders: EWD
https://www.readbyqxmd.com/read/28244782/morphological-characteristics-of-street-workout-practitioners
#9
Javier Sanchez-Martinez, Paula Plaza, Alberto Araneda, Patricio Sánchez, Atilio Almagiâ
INTRODUCTION: The determination of the morphological characteristics of the most popular sports has allowed the evaluation and comparison between athletes, which has helped to improve their performance. The Street Workout is an emerging sport based on calisthenics, which recently has become popular. Despite its popularization, neither the morphologic profile nor the morphologic characteristics of Street Workout athletes has been determined. OBJECTIVE: Determine the profile and morphological characteristics of Street-Workout athletes, through anthropometry...
February 1, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/28204901/the-effect-of-hydration-status-on-the-measurement-of-lean-tissue-mass-by-dual-energy-x-ray-absorptiometry
#10
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...
March 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
#11
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
#12
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...
March 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
#13
Matthew R McCann, Matthew A Veras, Cynthia Yeung, Gurkeet Lalli, Priya Patel, Kristyn M Leitch, David W Holdsworth, S Jeffrey Dixon, Cheryle 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...
May 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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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