Study on the validation of the computer science application's activity monitor in assessing the physical activity among adults using doubly labeled water method.
- Author:
Ai-ling LIU
1
;
Yan-ping LI
;
Jun SONG
;
Hui PAN
;
Xiu-ming HAN
;
Guan-sheng MA
Author Information
- Publication Type:Journal Article
- MeSH: Activities of Daily Living; Adult; Anthropometry; Body Weight; Calorimetry, Indirect; Energy Metabolism; physiology; Female; Humans; Male; Monitoring, Physiologic; instrumentation; Motor Activity; physiology; Physical Fitness; physiology
- From: Chinese Journal of Epidemiology 2005;26(3):197-200
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVEUsing doubly labeled water method to validate the colmputer science application's activity monitor (CSA) in assessing physical activity of free-living adults in Beijing, in order to develop equations to predict total daily energy expenditure (TEE) and activity related energy expenditure (AEE) from activity counts (AC) and anthropometric variables.
METHODSA total of 72 healthy adults (33 males and 39 females, mean age 43.6 +/- 4.0 yr) were monitored for 7 consecutive days by CSA. TEE was simultaneously measured using doubly labeled water method. Average AC (counts/min(-1)) was compared with TEE, AEE and physical activity level (PAL).
RESULTSPhysical activity determined by AC was significantly related to data on energy expenditures: TEE (r = 0.31, P < 0.01), AEE (r = 0.30, P < 0.05), and PAL (r = 0.26, P < 0.05). Multiple stepwise regression analysis showed that TEE was significantly influenced by gender, fat-free mass (FFM) or BMI and AC (R(2) = 0.52 - 0.70) while AEE was significantly influenced by gender, FFM and AC (R(2) = 0.25 - 0.32).
CONCLUSIONAC from CSA activity monitor seemed a useful measure in studying the total amount of physical activity in free-living adults while AC significantly contributed to the explained variation in TEE and AEE.
