Surveying predictors of late-life longitudinal change in daily activity energy expenditure
| Autor: | Yosuke Yamada, Sandrine Sourdet, Dawn C. Mackey, Tamara B. Harris, Todd M. Manini, Nancy W. Glynn, Dale A. Schoeller, Douglas C. Bauer, Vincenzo Valiani |
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| Přispěvatelé: | Dishman, Rod K |
| Rok vydání: | 2017 |
| Předmět: |
Male
Aging Physiology lcsh:Medicine Walking Urine Physical function Biochemistry Elderly 0302 clinical medicine Medicine and Health Sciences Medicine Public and Occupational Health Longitudinal Studies 030212 general & internal medicine lcsh:Science Multidisciplinary Body Fluids Physical limitations Energy expenditure Research Design Health Body Composition Female Anatomy Aging and Body Composition Study Research Article Indirect General Science & Technology Physical activity 030209 endocrinology & metabolism Bioenergetics Calorimetry Research and Analysis Methods 03 medical and health sciences Clinical Research Mental Health and Psychiatry Humans Exercise physiology Exercise Nutrition Aged Behavior Biological Locomotion business.industry lcsh:R Biology and Life Sciences Calorimetry Indirect Physical Activity Preferred walking speed Age Groups People and Places Basal metabolic rate Lean body mass lcsh:Q Population Groupings Basal Metabolism business Energy Metabolism Demography |
| Zdroj: | PloS one, vol 12, iss 10 Valiani, V; Sourdet, S; Schoeller, DA; Mackey, DC; Bauer, DC; Glynn, NW; et al.(2017). Surveying predictors of late-life longitudinal change in daily activity energy expenditure. PLOS ONE, 12(10). doi: 10.1371/journal.pone.0186289. UCSF: Retrieved from: http://www.escholarship.org/uc/item/6tm189zj PLoS ONE PLoS ONE, Vol 12, Iss 10, p e0186289 (2017) |
| DOI: | 10.1371/journal.pone.0186289. |
| Popis: | Author(s): Valiani, Vincenzo; Sourdet, Sandrine; Schoeller, Dale A; Mackey, Dawn C; Bauer, Douglas C; Glynn, Nancy W; Yamada, Yosuke; Harris, Tamara B; Manini, Todd M; Health, Aging and Body Composition Study | Abstract: BackgroundTotal daily energy expenditure (TEE) is composed of resting metabolic rate (RMR), post-prandial thermogenesis and activity energy expenditure (AEE). Higher AEE is strongly associated with lower mortality and physical limitations among older adults, but factors that predict changes in AEE in septu and octogenarians are not clearly understood.ObjectiveTo identify factors associated with late-life longitudinal change in AEE.DesignEnergy expenditure was re-assessed in 83 participants (average age at baseline, 74.4±3.2 years)-an average of 7.5±0.54 years since the baseline measure. RMR was measured using indirect calorimetry and the thermic effect of meals was estimated at 10% of TEE. AEE was calculated as: TEE(0.9)-RMR. Participants were categorized into two groups according to the estimated day-to-day precision of the doubly-labeled water technique. Those who were within 10% or increased relative to their initial AEE measurement were categorized as having preserved AEE. Participants who declined greater than 10% of their initial measurement were categorized as having reduced AEE. A variety of socio-demographic, functional and mental factors, body composition, community and personal behaviors, blood measurements and health conditions were evaluated between groups at baseline and changes during follow-up.ResultsDaily AEE declined 106.61±293.25 kcal, which equated to a 14.63±40.57 kcal/d decrease per year. Fifty-nine percent (n = 49) preserved their AEE and 41% (n = 34) declined. Those who demonstrated a decline in AEE were older, had lower walking speed at baseline and showed a higher lean mass loss during follow up. Otherwise, groups were similar for socio-demographic characteristics, body composition, mental and physical function, health conditions and community and personal behaviors at baseline and change in these factors during follow-up.ConclusionsThis study demonstrates that AEE declines through the 8th decade of life and is associated with age, lower walking speed at baseline and lean mass loss. Additionally, there are a significant number of individuals who appear to be resilient to these declines despite having health events that are expected to have a negative impact on their physical activity. |
| Databáze: | OpenAIRE |
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