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Author Cooper, Jamie A. ♦ Manini, Todd M. ♦ Paton, Chad M. ♦ Yamada, Yosuke ♦ Everhart, James E. ♦ Cummings, Steve ♦ Mackey, Dawn C. ♦ Newman, Anne B. ♦ Glynn, Nancy W. ♦ Tylavsky, Fran ♦ Harris, Tamara ♦ Schoeller, Dale A.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Energy Requirement ♦ Late Life ♦ Kcal V ♦ Year Time-span ♦ Body Composition ♦ Health Abc Study Background ♦ Significant Decrease ♦ Dual-energy X-ray Absorptiometry ♦ Longitudinal Change ♦ Predicted Total Energy Expenditure ♦ Activity Ee ♦ Fat Free Mass ♦ Indirect Calorimetry ♦ Metabolic Rate
Abstract for the Health ABC study Background: Very little is known about the longitudinal changes in energy requirements in late life. The purposes of this study were to: (1) determine the energy requirements in late life and how they changed during a 7 year time-span, (2) determine whether changes in fat free mass (FFM) were related to changes in resting metabolic rate (RMR), and (3) determine the accuracy of predicted total energy expenditure (TEE) to measured TEE. Methods: TEE was assessed via doubly labeled water (DLW) technique in older adults in both 1999 (n = 302; age: 74 ± 2.9 yrs) and again in 2006 (n = 87 age: 82 ± 3.1 yrs). RMR was measured with indirect calorimetry, and body composition was assessed with dual-energy x-ray absorptiometry. Results: The energy requirements in the 9th decade of life were 2208 ± 376 kcal/d for men and 1814 ± 337 kcal/d for women. This was a significant decrease from the energy requirements in the 8th decade of life in men (2482 ± 476 kcal/d vs. 2208 ± 376 kcal/d) but not in women (1892 ± 271 kcal/d vs. 1814 ± 337 kcal/d). In addition to TEE, RMR, and activity EE (AEE) also decreased in men, but not women, while FFM decreased in both men and women. The changes in FFM were correlated with changes in RMR for men (r = 0.49, p < 0.05) but not for women
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study