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body composition and DXA

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https://www.readbyqxmd.com/read/27898642/manipulation-of-muscle-creatine-and-glycogen-changes-dxa-estimates-of-body-composition
#1
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/27881458/dosage-of-estradiol-bone-and-body-composition-in-turner-syndrome-a-5-year-randomized-controlled-clinical-trial
#2
Line Cleemann, Kirsten Holm, Hanne Kobbernagel, Bent Kristensen, Sven Oluf Skouby, Andreas Emil Kryger Jensen, Claus Hojbjerg Gravholt
OBJECTIVE: Reduced bone mineral density (BMD) is seen in Turner syndrome (TS) with an increased risk of fractures, and body composition is characterized by increased body fat and decreased lean body mass. To evaluate the effect of two different doses of oral 17ß-estradiol in young TS women on bone mineral density (BMD), biochemical markers of bone turnover, and body composition with the hypothesis of a positive effect of the higher dose. DESIGN: A double-blind 5-year randomized controlled clinical trial...
November 23, 2016: European Journal of Endocrinology
https://www.readbyqxmd.com/read/27881116/concurrent-agreement-between-an-anthropometric-model-to-predict-thigh-volume-and-dual-energy-x-ray-absorptiometry-assessment-in-female-volleyball-players-aged-14-18-years
#3
Óscar M Tavares, João Valente-Dos-Santos, João P Duarte, Susana C Póvoas, Luís A Gobbo, Rômulo A Fernandes, Daniel A Marinho, José M Casanova, Lauren B Sherar, Daniel Courteix, Manuel J Coelho-E-Silva
BACKGROUND: A variety of performance outputs are strongly determined by lower limbs volume and composition in children and adolescents. The current study aimed to examine the validity of thigh volume (TV) estimated by anthropometry in late adolescent female volleyball players. Dual-energy X-ray absorptiometry (DXA) measures were used as the reference method. METHODS: Total and regional body composition was assessed with a Lunar DPX NT/Pro/MD+/Duo/Bravo scanner in a cross-sectional sample of 42 Portuguese female volleyball players aged 14-18 years (165...
November 24, 2016: BMC Pediatrics
https://www.readbyqxmd.com/read/27879627/dietary-intake-body-composition-and-menstrual-cycle-changes-during-competition-preparation-and-recovery-in-a-drug-free-figure-competitor-a-case-study
#4
Tanya M Halliday, Jeremy P Loenneke, Brenda M Davy
Physique competitions are events in which competitors are judged on muscular appearance and symmetry. The purpose of this retrospective case study was to describe changes in dietary intake, body mass/composition, and the menstrual cycle during the 20-week competition preparation (PREP) and 20-week post competition recovery (REC) periods of a drug-free amateur female figure competitor (age = 26-27, BMI = 19.5 kg/m²). Dietary intake (via weighed food records) and body mass were assessed daily and averaged weekly...
November 20, 2016: Nutrients
https://www.readbyqxmd.com/read/27875499/impact-of-acute-dietary-manipulations-on-dxa-and-bia-body-composition-estimates
#5
Grant M Tinsley, Flor E Morales, Jeffrey S Forsse, Peter W Grandjean
PURPOSE: To examine the effects of acute pre-assessment diets on body composition estimates obtained by dual-energy x-ray absorptiometry (DXA) and bioelectrical impedance analysis (BIA). METHODS: In a counterbalanced design, 48 males and females were provided with two one-day diets: high-carbohydrate diet (9 g CHO/kg) and very low-carbohydrate diet (1 to 1.5 g CHO/kg). For each condition, body composition was assessed in the morning after an overnight fast, in the afternoon after feeding, and the following morning after a second overnight fast...
November 21, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27875495/accuracy-and-reliability-of-assessing-lateral-compartmental-leg-composition-using-dxa
#6
Christiana J Raymond, Tyler A Bosch, Foster K Bush, Lisa S Chow, Donald R Dengel
PURPOSE: Investigate the accuracy and reliability of a novel dual X-ray absorptiometry (DXA) scanning method in the frontal plane for total, fat, and lean mass quantification of the anterior and posterior upper leg compartments. METHODS: Twenty-one (11 female; X[Combining Overline]age=20.3±1.3 yrs) college athletes were assessed for total and regional body composition using DXA. Segmentation of anterior/posterior thigh compartments was measured with participants lying on their right and left sides and the scanned leg elevated with two foam pads...
November 21, 2016: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/27871967/prevalence-and-etiology-of-hypogonadism-in-young-men-with-chronic-spinal-cord-injury-a-cross-sectional-analysis-from-two-university-based-rehabilitation-centers
#7
Shannon D Sullivan, Mark S Nash, Eshetu Tefera, Emily Tinsley, Marc R Blackman, Suzanne Groah
BACKGROUND: Spinal cord injury (SCI) triggers an 'accelerated aging' process that may include development of hypogonadism, even among younger men with SCI; however, few studies have investigated the prevalence or etiology of hypogonadism in men with SCI. Young men with SCI are also at increased risk for developing metabolic dysfunction after injury, which may be exacerbated by concomitant testosterone (T) deficiency, thus identifying the prevalence and risk factors for T deficiency in men with SCI is important for their long-term health...
November 18, 2016: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/27870908/n-terminal-pro-b-type-natriuretic-peptide-as-a-biomarker-for-loss-of-muscle-mass-in-prevalent-hemodialysis-patients
#8
Misa Ikeda, Hirokazu Honda, Keiko Takahashi, Kanji Shishido, Takanori Shibata
Protein-energy wasting (PEW) is common in hemodialysis (HD) patients. A recent study demonstrated that a high level of N-terminal pro-B-type natriuretic peptide (NT-proBNP) may be associated with PEW in those patients. This prospective study aimed to assess the association of NT-proBNP with body composition and muscle loss. A cohort of prevalent HD patients (n = 238) was examined. Blood samples were obtained at baseline to measure high-sensitive C-reactive protein (hsCRP), interleukin-6 (IL-6), adiponectin and NT-proBNP...
2016: PloS One
https://www.readbyqxmd.com/read/27866821/advanced-analysis-techniques-improve-infant-bone-and-body-composition-measures-by-dual-energy-x-ray-absorptiometry
#9
John A Shepherd, Markus J Sommer, Bo Fan, Cassidy Powers, Lynda Stranix-Chibanda, Amanda Zadzilka, Michael Basar, Kathy George, Cynthia Mukwasi-Kahari, George Siberry
OBJECTIVE: To evaluate a novel technique designed to reduce the negative impact of motion artifacts in infant dual-energy X-ray absorptiometry (DXA) scans. STUDY DESIGN: Using cross-sectional data from a large multicenter study, we developed and tested advanced methods for infant scan analysis. Newborns (n = 750) received spine and whole-body DXA scans with up to 3 attempts to acquire a motion free scan. Precision of infant DXA was estimated from visits with multiple valid scans...
November 18, 2016: Journal of Pediatrics
https://www.readbyqxmd.com/read/27866210/body-composition-in-very-preterm-infants-role-of-neonatal-characteristics-and-nutrition-in-achieving-growth-similar-to-term-infants
#10
Geneviève Tremblay, Christine Boudreau, Sylvie Bélanger, Odette St-Onge, Etienne Pronovost, David Simonyan, Isabelle Marc
BACKGROUND: The identification of factors involved in the postnatal growth of preterm infants will help achieve growth similar to that of term infants. OBJECTIVES: As per protocol: to compare body composition in very preterm infants at term-corrected age (TCA) with that in term infants, and to explore relationships between neonatal characteristics and body composition in preterm infants. METHODS: Anthropometry, nutritional characteristics, and neonatal outcomes were prospectively collected in 26 preterm (<29 weeks) and 33 term (37-40 weeks) infants...
November 19, 2016: Neonatology
https://www.readbyqxmd.com/read/27866187/a-pilot-study-examining-the-effects-of-8-week-whey-protein-versus-whey-protein-plus-creatine-supplementation-on-body-composition-and-performance-variables-in-resistance-trained-women
#11
Colin D Wilborn, Jordan J Outlaw, Petey W Mumford, Stacie L Urbina, Sara Hayward, Michael D Roberts, Lem W Taylor, Cliffa A Foster
AIMS: We performed a pilot study examining the effects of whey protein and creatine supplementation (PRO + CRE group) versus whey protein supplementation (PRO group) alone on body composition and performance variables in a limited number of resistance-trained women. METHODS: Seventeen resistance-trained women (21 ± 3 years, 64.7 ± 8.2 kg, 23.5 kg/m2, 26.6 ± 4.8% body fat, >6 months of training) performed a 4-day per week split-body resistance training program for 8 weeks...
November 19, 2016: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/27866087/a-predictive-model-for-estimating-regional-skeletal-muscle-size-by-two-point-dixon-magnetic-resonance-imaging-in-healthy-koreans
#12
Cheol-Min Kim, Chang-Hyung Lee, Young A Choi, Byoung-Chul Kim, Duk-Young Jung, Myung-Jun Shin
This study was undertaken to develop and cross-validate reference and individual predictive models for estimating functional thigh muscle cross-sectional area (TCSA) by 2-point Dixon magnetic resonance imaging (MRI). TCSAs of dominant sides at the mid-thigh level were measured by 2-point Dixon MRI ((MRI)TCSA). Functional (MRI)TCSA were compared with the predictive models in a sample of 92 younger (20-40 years; 28.55±4.87; n=50) and older (>65years; 71.22±4.82; n=42) Koreans. Lean body masses were measured by dual energy X-ray absorptiometry ((DXA)LBM), and thigh isokinetic muscle strengths, extension peak torque at 60°/sec, were measured using a Biodex(®) dynamometer ((Biodex)EPT)...
November 6, 2016: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/27859677/plane-of-nutrition-affects-growth-rate-organ-size-and-skeletal-muscle-satellite-cell-activity-in-newborn-calves
#13
M E MacGhee, J S Bradley, S R McCoski, A M Reeg, A D Ealy, S E Johnson
Plane of nutrition effects on body, tissue and cellular growth in the neonatal calf are poorly understood. The hypothesis that a low plane of nutrition (LPN) would limit skeletal muscle size by reducing fibre growth and muscle progenitor cell activity was tested. At birth, calves were randomly assigned to either a LPN (20% CP, 20% fat; GE=1.9 Mcal/days) or a high plane of nutrition (HPN; 27% CP, 10% fat, GE = 3.8 Mcal/days) in a 2 × 3 factorial design to test the impact of diet on neonatal calf growth, organ weight and skeletal muscle morphometry with time...
November 18, 2016: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/27857692/endurance-training-intensity-does-not-mediate-interference-to-maximal-lower-body-strength-gain-during-short-term-concurrent-training
#14
Jackson J Fyfe, Jonathan D Bartlett, Erik D Hanson, Nigel K Stepto, David J Bishop
We determined the effect of concurrent training incorporating either high-intensity interval training (HIT) or moderate-intensity continuous training (MICT) on maximal strength, counter-movement jump (CMJ) performance, and body composition adaptations, compared with single-mode resistance training (RT). Twenty-three recreationally-active males (mean ± SD: age, 29.6 ± 5.5 y; [Formula: see text], 44 ± 11 mL kg(-1)·min(-1)) underwent 8 weeks (3 sessions·wk(-1)) of either: (1) HIT combined with RT (HIT+RT group, n = 8), (2) work-matched MICT combined with RT (MICT+RT group, n = 7), or (3) RT performed alone (RT group, n = 8)...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27837272/body-composition-analysis-by-dxa-dual-x-ray-absorptiometry-in-brazilian-men-normative-data
#15
Marcela Ushida, Marcelo de Medeiros Pinheiro, Charlles Heldan de Moura Castro, Vera Lucia Szejnfeld
Considering ethnic and anthropometric differences, it is important to obtain specific normative data on body composition (BC) for each population. The objectives of this study were to obtain the normative curve for the BC of Brazilian men and to compare them to the North American male population. A total of 403 healthy Brazilian men 20 years and older were included in the study. Data on concomitant diseases and physical activity were investigated using a structured questionnaire. Conditions that could affect lean and fat mass were excluded...
November 11, 2016: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/27837268/effect-of-high-dose-cholecalciferol-vitamin-d3-on-bone-and-body-composition-in-children-and-young-adults-with-hiv-infection-a-randomized-double-blind-placebo-controlled-trial
#16
A J Rovner, V A Stallings, R Rutstein, J I Schall, M B Leonard, B S Zemel
: It is unknown whether vitamin D supplementation positively impacts body composition and bone outcomes in children and young adults with HIV. This RCT found that despite increasing 25(OH)D concentrations, high dose vitamin D3 supplementation did not impact bone or body composition in children and young adults with HIV infection. INTRODUCTION: The objective of this paper was to determine the impact of high-dose daily cholecalciferol (vitamin D3) supplementation on body composition and bone density, structure, and strength in children and young adults with perinatally acquired (PHIV) or behaviorally acquired (BHIV) HIV infection...
November 11, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27821086/antineoplastic-treatment-effect-on-bone-mineral-density-in-mexican-breast-cancer-patients
#17
Karina Monroy-Cisneros, Julián Esparza-Romero, Mauro E Valencia, Alfonso G Guevara-Torres, Rosa O Méndez-Estrada, Iván Anduro-Corona, Humberto Astiazarán-García
BACKGROUND: Breast cancer is the most deadly malignancy in Mexican women. Although treatment has improved, it may significantly affect bone mineral status in those who receive it. The aim of this study was to assess the impact of cancer treatment on bone mineral density (BMD) and bone mineral content (BMC), in patients with breast cancer and explore the interaction of menopausal status and clinical stage with cancer treatment on such changes. METHODS: A quasi-experimental design was applied with measurements before and after a chemotherapy treatment in 40 patients with primary diagnosis of invasive breast cancer...
November 8, 2016: BMC Cancer
https://www.readbyqxmd.com/read/27815068/body-composition-and-metabolic-outcomes-after-96-weeks-of-treatment-with-ritonavir-boosted-lopinavir-plus-either-nucleoside-or-nucleotide-reverse-transcriptase-inhibitors-or-raltegravir-in-patients-with-hiv-with-virological-failure-of-a-standard-first-line
#18
Mark A Boyd, Janaki Amin, Patrick W G Mallon, Nagalingeswaran Kumarasamy, Johan Lombaard, Robin Wood, Ploenchan Chetchotisakd, Praphan Phanuphak, Lerato Mohapi, Iskandar Azwa, Waldo H Belloso, Jean-Michel Molina, Jennifer Hoy, Cecilia L Moore, Sean Emery, David A Cooper
BACKGROUND: Lipoatrophy is one of the most feared complications associated with the use of nucleoside or nucleotide reverse transcriptase inhibitors (N[t]RTIs). We aimed to assess soft-tissue changes in participants with HIV who had virological failure of a first-line antiretroviral (ART) regimen containing a non-nucleoside reverse transcriptase inhibitor plus two N(t)RTIs and were randomly assigned to receive a second-line regimen containing a boosted protease inhibitor given with either N(t)RTIs or raltegravir...
November 1, 2016: Lancet HIV
https://www.readbyqxmd.com/read/27810310/probiotic-with-or-without-fiber-controls-body-fat-mass-associated-with-serum-zonulin-in-overweight-and-obese-adults-randomized-controlled-trial
#19
Lotta K Stenman, Markus J Lehtinen, Nils Meland, Jeffrey E Christensen, Nicolas Yeung, Markku T Saarinen, Michael Courtney, Rémy Burcelin, Marja-Leena Lähdeaho, Jüri Linros, Dan Apter, Mika Scheinin, Hilde Kloster Smerud, Aila Rissanen, Sampo Lahtinen
BACKGROUND: The gut microbiota is interlinked with obesity, but direct evidence of effects of its modulation on body fat mass is still scarce. We investigated the possible effects of Bifidobacterium animalisssp. lactis 420 (B420) and the dietary fiber Litesse® Ultra polydextrose (LU) on body fat mass and other obesity-related parameters. METHODS: 225 healthy volunteers (healthy, BMI 28-34.9) were randomized into four groups (1:1:1:1), using a computer-generated sequence, for 6months of double-blind, parallel treatment: 1) Placebo, microcrystalline cellulose, 12g/d; 2) LU, 12g/d; 3) B420, 10(10)CFU/d in microcrystalline cellulose, 12g/d; 4) LU+B420, 12g+10(10)CFU/d...
October 26, 2016: EBioMedicine
https://www.readbyqxmd.com/read/27804230/active-individuals-have-high-mitochondrial-content-and-oxidative-markers-in-their-abdominal-subcutaneous-adipose-tissue
#20
Maria F Pino, Stephanie A Parsons, Steven R Smith, Lauren M Sparks
OBJECTIVE: Exercise training (training) effects on white adipose tissue (WAT) thermogenic and oxidative capacities in humans are inconclusive. This study aimed to investigate whether an active lifestyle is characterized by thermogenic and/or oxidative transcriptional markers in human WAT. METHODS: In vivo maximal muscle ATP synthetic rates (ATPmax) were measured by (31) P-MRS, body composition by DXA, and peak oxygen uptake (VO2 peak) by cycle ergometry in active (n = 7) and sedentary (SED) individuals before and after 3 weeks of training (n = 9, SED only)...
November 2, 2016: Obesity
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