Effects of Daily Activities on Dual-Energy X-ray Absorptiometry Measurements of Body Composition in Active People

Nana, Alisa; Slater, Gary; Hopkins, Will G.; Burke, Louise M.

doi:10.1249/mss.0b013e318228b60e

Cited by 152 publications

(170 citation statements)

References 35 publications

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“…Players wore their playing boots when undertaking the speed, agility and endurance assessments, which occurred outdoor on a 3G pitch. Due to the effects of hydration status of body composition measures using DXA (29), all DXA scans were undertaken prior to the Yo-Yo test, whereby sweat losses were inevitable. All other tests would likely have a limited effect on fluid balance.…”

Section: Methodsmentioning

confidence: 99%

Physical Qualities of International Female Rugby League Players by Playing Position

Jones

Emmonds

Hind

et al. 2016

Journal of Strength and Conditioning Research

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The purpose of the current study was to investigate the anthropometric, body composition and fitness characteristics of female rugby league players by playing position. Data were collected on 27 players who were part of the English elite women's rugby league squad. Player assessments comprised anthropometric (stature and body mass), body composition (dual-energy X-ray absorptiometry) and fitness (lower-body power [countermovement jump (CMJ), 20 kg jump squat (JS) and 30 cm drop jump], 5, 10, 20, 30, and 40 m sprint, 505 agility, Yo-Yo intermittent recovery test level 1) measures. Players were classified into playing position (i.e., forwards and backs) prior to analysis. A multivariate analysis of variance (MANOVA) demonstrated significant (p<0.05) differences for body mass, stature, total fat, lean mass and percentage body fat between forwards and backs. Positional differences were also observed for speed, agility and lower-body power. Significant relationships were observed between total body fat and all fitness variables, and total lean mass was related to CMJ and JS peak power. This study provides comparative data for female rugby league forwards and backs. Body fat was strongly associated with performance and should therefore be considered in developing fitness characteristics. The relationship to match performance and trainability of these characteristics warrants further investigation.

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Section: Methodsmentioning

confidence: 99%

Physical Qualities of International Female Rugby League Players by Playing Position

Jones

Emmonds

Hind

et al. 2016

Journal of Strength and Conditioning Research

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show abstract

“…A total body scan was selected as this has been shown to provide the identification of osteoporosis at numerous skeletal sites and data on body composition (Melton et al, 2005). All participants were scanned according to Australian Institute of Sport best practice protocols for a total body scan (Nana, Slater, Hopkins, & Burke, 2012). Before conducting the full study, a pilot study was conducted to determine the reliability of data collection and analysis of the DXA scans.…”

Section: Data Collectionmentioning

confidence: 99%

Effects of Long-Term Surfing on Bone Health in Mature-Aged Males

Climstein

Pollard

Furness

et al. 2015

IJARE

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“…Studies on the influence of daily activities, meal ingestion, and acute exercise on body composition estimates have already been performed in healthy controls (Horber, Thomi, Casez, Fonteille, & Jaeger, 1992) and more recently on athletes (Nana, Slater, Hopkins, & Burke, 2013;Nana, Slater, Hopkins, & Burke, 2011). Furthermore, previous work has not compared DXA estimates with skinfolds/impedance analysis outcomes following an acute fluid deficit.…”

Section: Introductionmentioning

confidence: 99%

Errors in Dual Energy X-Ray Absorptiometry Estimation of Body Composition Induced by Hypohydration

Rodríguez-Sánchez¹,

Galloway²

2015

International Journal of Sport Nutrition and Exercise Metabolism

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Dual energy X-ray absorptiometry (DXA) is a popular tool to determine body composition (BC) in athletes, and is used for analysis of fat-free soft tissue mass (FFST) or fat mass (FM) gain/loss in response to exercise or nutritional interventions. The aim of the present study was to assess the effect of exercise-heat stress induced hypohydration (HYP, >2% of body mass (BM) loss) vs. maintenance of euhydration (EUH) on DXA estimates of BC, sum of skinfolds (SF), and impedance (Berk et al.) measurements in athletes. Competitive athletes (23 males and 15 females) recorded morning nude BM for 7 days prior to the first main trial.Measurements on the first trial day were conducted in a EUH condition, and again after exercise-heat stress induced HYP. On the second trial day, fluid and electrolyte losses were replaced during exercise using a sports drink. A reduction in total BM (1.6±0.4 kg; 2.3±0.4% HYP) and total LM (1.3±0.4 kg), mainly from trunk (1.1±0.5 kg), was observed using DXA when participants were HYP, reflecting the sweat loss. Estimated fat percent increased (0.3±0.3%), however, total FM did not change (0.1±0.2 kg). SF and IMP declined with HYP (losses of 1.5±2.9% and 1.6±3% respectively) suggesting FM loss. When EUH was maintained there were no significant changes in BM, DXA estimates, or SF values pre to post exercise, but IMP still declined. We conclude that use of DXA for LM assessment in athletes must ensure a EUH state, particularly when considering changes associated with nutritional or exercise interventions.

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Effects of Daily Activities on Dual-Energy X-ray Absorptiometry Measurements of Body Composition in Active People

Cited by 152 publications

References 35 publications

Physical Qualities of International Female Rugby League Players by Playing Position

Physical Qualities of International Female Rugby League Players by Playing Position

Effects of Long-Term Surfing on Bone Health in Mature-Aged Males

Errors in Dual Energy X-Ray Absorptiometry Estimation of Body Composition Induced by Hypohydration

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