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Titolo:
Muscularity and the density of the fat-free mass in athletes
Autore:
Prior, BM; Modlesky, CM; Evans, EM; Sloniger, MA; Saunders, MJ; Lewis, RD; Cureton, KJ;
Indirizzi:
Univ Georgia, Dept Exercise Sci, Athens, GA 30602 USA Univ Georgia AthensGA USA 30602 Dept Exercise Sci, Athens, GA 30602 USA Univ Georgia, Dept Foods & Nutr, Athens, GA 30602 USA Univ Georgia AthensGA USA 30602 Dept Foods & Nutr, Athens, GA 30602 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 4, volume: 90, anno: 2001,
pagine: 1523 - 1531
SICI:
8750-7587(200104)90:4<1523:MATDOT>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENERGY X-RAY; BONE-MINERAL MEASUREMENTS; BODY-COMPOSITION; 4-COMPONENT MODEL; DISTANCE RUNNERS; MUSCLE MASS; LEG MUSCLE; ABSORPTIOMETRY; 2-COMPARTMENT; VARIABILITY;
Keywords:
body composition; body water; bone mineral; densitometry; dual-energy X-ray absorptiometry; multicomponent models;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Prior, BM Univ Missouri, Dept Vet Biomed Sci, E102 Vet Med Bldg, Columbia,MO 65211 USA Univ Missouri E102 Vet Med Bldg Columbia MO USA 65211 65211 USA
Citazione:
B.M. Prior et al., "Muscularity and the density of the fat-free mass in athletes", J APP PHYSL, 90(4), 2001, pp. 1523-1531

Abstract

The purpose of this study was to use estimates of body composition from a four-component model to determine whether the density of the fat-free mass (D-FFM) is affected by muscularity or musculoskeletal development in a heterogenous group of athletes and nonathletes. Measures of body density by hydrostatic weighing, body water by deuterium dilution, bone mineral by whole body dual-energy X-ray absorptiometry (DXA), total body skeletal muscle estimated from DXA, and musculoskeletal development as measured by the mesomorphy rating from the Heath-Carter anthropometric somatotype were obtained in111 collegiate athletes (67 men and 44 women) and 61 nonathletes (24 men and 37 women). In the entire group, D-FFM varied from 1.075 to 1.127 g/cm(3)and was strongly related to the water and protein fractions of the fat-free mass (FFM; r = -0.96 and 0.89) and moderately related to the mineral fraction of the FFM (r = 0.65). Skeletal muscle (%FFM) varied from 40 to 68%, and mesomorphy varied from 1.6 to 9.6, but neither was significantly relatedto D-FFM (r = 0.11 and -0.14) or to the difference between percent fat estimated from the four-component model and from densitometry (r = 0.09 and -0.16). We conclude that, in a heterogeneous group of young adult athletes and nonathletes, D-FFM and the accuracy of estimates of body composition frombody density using the Siri equation are not related to muscularity or musculoskeletal development. Athletes in selected sports may have systematic deviations in D-FFM from the value of 1.1 g/cm(3) assumed in the Siri equation, resulting in group mean errors in estimation of percent fat from densitometry of 2-5% body mass, but the cause of these deviations is complex and not simply a reflection of differences in muscularity or musculoskeletal development.

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Documento generato il 15/07/20 alle ore 15:04:23