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The normal relationship between fat and lean mass for mature (21-30 year old) physically fit men and women.
Potter, Adam W; Tharion, William J; Nindl, Lyndsey J; McEttrick, David M; Looney, David P; Friedl, Karl E.
Afiliación
  • Potter AW; Thermal and Mountain Medicine Division, U.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts, USA.
  • Tharion WJ; Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts, USA.
  • Nindl LJ; Thermal and Mountain Medicine Division, U.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts, USA.
  • McEttrick DM; Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, Tennessee, USA.
  • Looney DP; Marine Expeditionary Rifle Squad, PfM Ground Combat Element Systems, Marine Corps Systems Command, Quantico, Virginia, USA.
  • Friedl KE; Military Performance Division, U.S. Army Research Institute of Environmental Medicine, Natick, Massachusetts, USA.
Am J Hum Biol ; 36(1): e23984, 2024 Jan.
Article en En | MEDLINE | ID: mdl-37695262
OBJECTIVE: Determine if relative body fat (%BF) remains a biological norm in physically active, non-obese American men and women and determine reference values for other components of body composition. METHODS: Participants (n = 174 men, 70 women) were physically fit U.S. Marine 2nd Lieutenants, in their third decade of physical maturity (age 21-30). Body composition was assessed by dual-energy x-ray absorptiometry (DXA) and bioelectrical impedance analysis (BIA); and body images were obtained by 3D body scans. RESULTS: For men and women, respectively, %BF averaged 16.2 ± 4.1 (median 15.3), 24.3 ± 4.5 (median 23.8); fat-free mass (FFM): 67.7 ± 7.2, 49.4 ± 5.3 kg; FFM index: 21.5 ± 1.8, 18.3 ± 1.6 kg/m2 ; and body mass index (BMI): 25.5 ± 1.9, 24.1 ± 2.2 kg/m2 . Bone mineral content (BMC) was 5% of FFM; total body water (TBW) was 70%-72% of FFM. Physique remained similar between median and higher percentiles of %BF. Only small changes in key measures were noted across the six-month training program. CONCLUSIONS: Mean %BF of healthy active men and women in 2021 remains very similar to the 15% and 25% posited in 1980, suggesting that relative body fat has a normal fat-lean relationship in physically mature humans. These data may bring new attention to sex-appropriate %BF.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Composición Corporal / Tejido Adiposo Límite: Adult / Female / Humans / Male Idioma: En Revista: Am J Hum Biol Asunto de la revista: BIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Composición Corporal / Tejido Adiposo Límite: Adult / Female / Humans / Male Idioma: En Revista: Am J Hum Biol Asunto de la revista: BIOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos