Energy expenditure at rest and during activities: A comparison between young and elderly women

✍ Scribed by A. Haveman-Nies; C. Van Iperen; P. Deurenberg

• Book ID: 102660539
• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 575 KB
• Volume: 8
• Category: Article
• ISSN: 1042-0533
• DOI: 10.1002/(sici)1520-6300(1996)8:3<383::aid-ajhb9>3.0.co;2-0

✦ Synopsis

Energy expenditure at rest (resting metabolic rate, RMR) and during several activities was measured in 20 young (age 19-27 years) and 19 elderly (age 65-78 years) females. Fat-free mass (FFM) was estimated by means of a four compartment model which accounted for variability in water and bone mineral in the FFM. RMR was lower ( P < 0.05) in the elderly (mean 2 SE 3.55 IfI 0.05 kJ/min) compared to the younger females (3.92 % 0.09 kJ/min). However, after correction for differences in FFM between the groups, RMR was 3.71 ? 0.07 kJ/min and 3.77 ? 0.06 kJ/min for the elderly and young, respectively, and the difference was not significant. Energy expenditure (EE) during several activities, standing with arm movement, bicycling at 25 Watts, and walking a t 3 k m h , were not different between the two groups. However, the physical activity ratios (PAR) for the activities were higher (P < 0.05) in the elderly (1.61 I 0.03, 3.29 2 0.07, 4.11 2 0.16, respectively) than in the young (1.47 * 0.03,2.93 ? 0.05,3.58 ? 0.14, respec-