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Sedentarism affects body fat mass index and fat-free mass index in adults aged 18 to 98 years.
Nutrition 2004; 20(3):255-60N

Abstract

OBJECTIVE

Body mass index does not discriminate body fat from fat-free mass or determine changes in these parameters with physical activity and aging. Body fat mass index (BFMI) and fat-free mass index (FFMI) permit comparisons of subjects with different heights. This study evaluated differences in body mass index, BFMI, and FFMI in physically active and sedentary subjects younger and older than 60 y and determined the association between physical activity, age, and body composition parameters in a healthy white population between ages 18 and 98 y.

METHODS

Body fat and fat-free mass were determined in healthy white men (n = 3549) and women (n = 3184), between ages 18 and 98 y, by bioelectrical impedance analysis. BFMI and FFMI (kg/m2) were calculated. Physical activity was defined as at least 3 h/wk of endurance-type activity for at least 2 mo.

RESULTS

Physically active as opposed to sedentary subjects were more likely to have a low BFMI (men: odds ratio [OR], 1.4; confidence interval [CI], 0.7-2.5; women: OR 1.9, CI 1.6-2.2) and less likely to have very high BFMI (men: OR, 0.2; CI, 0.1-0.2; women: OR, 0.1; CI, 0.02-0.2), low FFMI (men: OR, 0.5; CI, 0.3-0.9; women: OR, 0.7; CI, 0.6-0.9), or very high FFMI (men: OR, 0.6; CI, 0.4-0.8; women: OR, 0.7; CI, 0.5-1.0). Compared with subjects younger than 60 y, those older than 60 y were more like to have very high BFMI (men: OR, 6.5; CI, 4.5-9.3; women: OR, 14.0; CI, 9.6-20.5), and women 60 y and older were less likely to have a low BFMI (OR, 0.4; CI, 0.2-0.5).

CONCLUSIONS

A clear association was found between low physical activity or age and height-normalized body composition parameters (BFMI and FFMI) derived from bioelectrical impedance analysis. Physically active subjects were more likely to have high or very high or low FFMI. Older subjects had higher body weights and BFMI.

Authors+Show Affiliations

Department of Clinical Nutrition, Geneva University Hospital, Geneva, Switzerland.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

14990265

Citation

Kyle, Ursula G., et al. "Sedentarism Affects Body Fat Mass Index and Fat-free Mass Index in Adults Aged 18 to 98 Years." Nutrition (Burbank, Los Angeles County, Calif.), vol. 20, no. 3, 2004, pp. 255-60.
Kyle UG, Morabia A, Schutz Y, et al. Sedentarism affects body fat mass index and fat-free mass index in adults aged 18 to 98 years. Nutrition. 2004;20(3):255-60.
Kyle, U. G., Morabia, A., Schutz, Y., & Pichard, C. (2004). Sedentarism affects body fat mass index and fat-free mass index in adults aged 18 to 98 years. Nutrition (Burbank, Los Angeles County, Calif.), 20(3), pp. 255-60.
Kyle UG, et al. Sedentarism Affects Body Fat Mass Index and Fat-free Mass Index in Adults Aged 18 to 98 Years. Nutrition. 2004;20(3):255-60. PubMed PMID: 14990265.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sedentarism affects body fat mass index and fat-free mass index in adults aged 18 to 98 years. AU - Kyle,Ursula G, AU - Morabia,Alfredo, AU - Schutz,Yves, AU - Pichard,Claude, PY - 2004/3/3/pubmed PY - 2004/8/25/medline PY - 2004/3/3/entrez SP - 255 EP - 60 JF - Nutrition (Burbank, Los Angeles County, Calif.) JO - Nutrition VL - 20 IS - 3 N2 - OBJECTIVE: Body mass index does not discriminate body fat from fat-free mass or determine changes in these parameters with physical activity and aging. Body fat mass index (BFMI) and fat-free mass index (FFMI) permit comparisons of subjects with different heights. This study evaluated differences in body mass index, BFMI, and FFMI in physically active and sedentary subjects younger and older than 60 y and determined the association between physical activity, age, and body composition parameters in a healthy white population between ages 18 and 98 y. METHODS: Body fat and fat-free mass were determined in healthy white men (n = 3549) and women (n = 3184), between ages 18 and 98 y, by bioelectrical impedance analysis. BFMI and FFMI (kg/m2) were calculated. Physical activity was defined as at least 3 h/wk of endurance-type activity for at least 2 mo. RESULTS: Physically active as opposed to sedentary subjects were more likely to have a low BFMI (men: odds ratio [OR], 1.4; confidence interval [CI], 0.7-2.5; women: OR 1.9, CI 1.6-2.2) and less likely to have very high BFMI (men: OR, 0.2; CI, 0.1-0.2; women: OR, 0.1; CI, 0.02-0.2), low FFMI (men: OR, 0.5; CI, 0.3-0.9; women: OR, 0.7; CI, 0.6-0.9), or very high FFMI (men: OR, 0.6; CI, 0.4-0.8; women: OR, 0.7; CI, 0.5-1.0). Compared with subjects younger than 60 y, those older than 60 y were more like to have very high BFMI (men: OR, 6.5; CI, 4.5-9.3; women: OR, 14.0; CI, 9.6-20.5), and women 60 y and older were less likely to have a low BFMI (OR, 0.4; CI, 0.2-0.5). CONCLUSIONS: A clear association was found between low physical activity or age and height-normalized body composition parameters (BFMI and FFMI) derived from bioelectrical impedance analysis. Physically active subjects were more likely to have high or very high or low FFMI. Older subjects had higher body weights and BFMI. SN - 0899-9007 UR - https://www.unboundmedicine.com/medline/citation/14990265/Sedentarism_affects_body_fat_mass_index_and_fat_free_mass_index_in_adults_aged_18_to_98_years_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0899900703002879 DB - PRIME DP - Unbound Medicine ER -