scholarly journals Comparison of Accuracy Among Pedometers from Five Japanese Manufacturers

2013 ◽  
Vol 6 (1) ◽  
pp. 56-61
Author(s):  
So Osawa ◽  
Hisaaki Tabuchi ◽  
Kenichi Nemoto ◽  
Shuhei Tokimasa ◽  
Shotaro Misaki ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Energy Expenditure ◽  
Body Mass ◽  
Correlation Coefficients ◽  
Step Counts ◽  
Actual Amount ◽  
Daily Exercise ◽  
All Speeds ◽  
Walking Speeds

The reliability of commercially available pedometers is not known in detail. Therefore, the present study examines the accuracy and reliability of the FS500 (Acos), HJ301 (Omron), EX700 (Yamax), FB727 (Tanita) and TW600 (Citizen) pedometers to count steps and measure energy expenditure at various walking speeds. Twenty individuals (age, 32.5 ± 15.3 years; body mass index, 22.0 ± 1.6 kg/m2) walked at three speeds for 6 min. Step-counts and energy expenditure determined by each pedometer were compared with actual values. All five pedometers accurately measured steps at all speeds, but tended to underestimate expended calories to within 50% of the actual amount of energy expenditure. The correlation coefficients (R) between actual energy expenditure and pedometer values were between 0.74 and 0.87. Thus, feedback about energy expenditure is somewhat inaccurate. In contrast, step counts are very accurate, and thus pedometers are useful tools with which to indicate daily exercise levels.

Serum leptin levels and energy expenditure in normal weight women

1998 ◽  
Vol 76 (2) ◽  
pp. 237-241 ◽  
Author(s):  
L J Martin ◽  
PJH Jones ◽  
R V Considine ◽  
W Su ◽  
N F Boyd ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Food Intake ◽  
Energy Expenditure ◽  
Body Mass ◽  
Body Fat ◽  
Positive Association ◽  
Normal Weight ◽  
Serum Leptin ◽  
Percentage Body Fat ◽  
Healthy Humans

To investigate whether circulating leptin levels are associated with energy expenditure in healthy humans, doubly labeled water energy measurements and food intake assessment were carried out in 27 women (mean age, 48.6 years; weight, 61.9 kg; body mass index, 23.2). Energy expenditure was determined over 13 days. Food intake was measured by 7-day food records. Leptin was measured by radioimmunoassay. Leptin level was strongly associated with percentage body fat (r = 0.59; p < 0.001), fat mass (r = 0.60; p < 0.001), and body mass index (r = 0.41; p = 0.03), but no correlation was observed with energy expenditure (r = 0.02; p = 0.93). After controlling for percentage body fat, a positive association of leptin level with energy expenditure of marginal significance (p = 0.06) was observed. There were no significant univariate associations of age, physical activity, lean body mass, height, or dietary variables with leptin level. When controlling for body fat, a significant positive correlation was observed for percent energy from carbohydrate and negative correlations with dietary fat and alcohol intake. These findings confirm previous associations between leptin and body fat content and suggest a relationship between serum leptin and energy expenditure level in healthy humans.Key words: leptin, energy expenditure, body composition, diet.

ENERGY EXPENDITURE IN 21-HYDROXYLASE CONGENITAL ADRENAL HYPERPLASIA PATIENTS AND COMPARISON WITH PREDICTIVE EQUATIONS

2020 ◽  
Vol 26 (4) ◽  
pp. 388-398
Author(s):  
Daniel Minutti de Oliveira ◽  
Ana Carolina Junqueira Vasques ◽  
Ezequiel Moreira Gonçalves ◽  
Sofia Helena Valente de Lemos-Marini ◽  
Gil Guerra-Junior ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Weight ◽  
Energy Expenditure ◽  
Congenital Adrenal Hyperplasia ◽  
Body Mass ◽  
Indirect Calorimetry ◽  
Resting Energy Expenditure ◽  
Adrenal Hyperplasia ◽  
Predictive Equations ◽  
17 Hydroxyprogesterone

Objective: To characterize resting energy expenditure (REE) in patients with classic 21-hydroxylase congenital adrenal hyperplasia (21-OH CAH) using indirect calorimetry and compare it to the most commonly used REE predictive equations. Methods: This case-control study comprised 29 post-pubertal 21-OH CAH patients regularly followed at the University of Campinas. Elevated serum 17-hydroxyprogesterone and CYP21 gene molecular analysis confirmed the diagnosis. A healthy control group paired by age, gender, and body mass index was examined. Dual-energy X-ray absorptiometry (DEXA) measured body compositions. A bioimpedance analyzer determined fat-free mass, and indirect calorimetry using a metabolic cart measured REE. Results: Unlike our initial hypothesis, REE was similar between the groups (18.7 ± 3.1 kcal/kg/day in CAH vs. 20.3 ± 3.5 kcal/kg/day in controls; P = .728). No predictive equations reached the stipulated accuracy criteria, thus lacking validity in REE assessment in adults with the characteristics of the group studied. DEXA analysis revealed higher body fat and diminished nonbone lean mass in 21-OH CAH. Anthropometric and bioelectrical impedance parameters were not significantly different. Conclusion: Classic 21-OH CAH is generally followed in reference centers, which may facilitate indirect calorimetry use for REE measurement. Alternatively, considering our REE findings in adult 21-OH CAH patients, nutrition management based on 25 kcal/body weight/day (measured REE × activity factor 1.2 to 1.3) may be reasonable for current body weight maintenance in these patients. Abbreviations: 17-OHP = 17-hydroxyprogesterone; 21-OH CAH = classic 21-hydroxylase deficiency congenital adrenal hyperplasia; BMI = body mass index; REE = resting energy expenditure; VO2 = volume of oxygen; VCO2 = volume of carbon dioxide

scholarly journals Changes in bicycling over time associated with a new bike lane: Relations with kilocalories energy expenditure and body mass index

2016 ◽  
Vol 3 (3) ◽  
pp. 357-365 ◽  
Author(s):  
Barbara B. Brown ◽  
Douglas Tharp ◽  
Calvin P. Tribby ◽  
Ken R. Smith ◽  
Harvey J. Miller ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Energy Expenditure ◽  
Body Mass ◽  
Over Time

scholarly journals Stability, Continuity, and Bi-Directional Associations of Parental Feeding Practices and Standardized Child Body Mass Index in Children from 2 to 12 Years of Age

Nutrients ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1751 ◽  
Author(s):  
Janina Eichler ◽  
Ricarda Schmidt ◽  
Tanja Poulain ◽  
Andreas Hiemisch ◽  
Wieland Kiess ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Economic Status ◽  
Correlation Coefficients ◽  
Feeding Practices ◽  
Population Based ◽  
Parental Feeding Practices ◽  
Parental Feeding ◽  
Child Body Mass Index ◽  
Child Bmi

(1) Background: Parental feeding practices are related to child body mass index (BMI, kg/m2) and seem to be a consequence rather than cause of child BMI, but research so far is limited. Stability and continuity of feeding practices, probably explaining changes in food intake and child BMI, remain to be poorly examined. (2) Methods: Feeding practices (i.e., restriction, food as reward, pressure to eat, monitoring) assessed via the Child Feeding Questionnaire, child age, standardized BMI (zBMI), and socio-economic status were measured annually at multiple visits (range 2–8) in a population-based longitudinal cohort study of 1512 parents with their children aged 2 to 12 years. Stability, continuity, and bi-directionality of feeding practices and child zBMI were calculated using correlation coefficients, paired t tests, and cross-lagged panels, respectively. (3) Results: Feeding practices and child zBMI showed moderate to high stability. While continuity was high for restriction, minor temporal changes were observed for other feeding practices and child zBMI. Cross-lags indicated that child zBMI predicted restriction, pressure to eat, and monitoring, while food-rewarding predicted child zBMI only minorly. (4) Conclusions: Parents seem to adapt feeding practices to child zBMI with the exception of food-rewarding.

scholarly journals Control Reference Parameter for Stance Assistance Using a Passive Controlled Ankle Foot Orthosis—A Preliminary Study

2019 ◽  
Vol 9 (20) ◽  
pp. 4416 ◽  
Author(s):  
Dimas Adiputra ◽  
Mohd Azizi Abdul Rahman ◽  
Ubaidillah ◽  
Saiful Amri Mazlan ◽  
Nurhazimah Nazmi ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Standard Error ◽  
Walking Speed ◽  
Parameters Estimation ◽  
Ankle Foot Orthosis ◽  
Preliminary Study ◽  
Reference Parameters ◽  
Walking Speeds ◽  
Foot Orthosis

This paper aims to present a preliminary study of control reference parameters for stance assistance among different subjects and walking speeds using a passive-controlled ankle foot orthosis. Four young male able-bodied subjects with varying body mass indexes (23.842 ± 4.827) walked in three walking speeds of 1, 3, and 5 km/h. Two control references, average ankle torque (aMa), and ankle angular velocity (aω), which can be implemented using a magnetorheological brake, were measured. Regression analysis was conducted to identify suitable control references in the three different phases of the stance. The results showed that aω has greater correlation (p) with body mass index and walking speed compared to aMa in the whole stance phase (p1(aω) = 0.666 > p1(aMa) = 0.560, p2(aω) = 0.837 > p2(aMa) = 0.277, and p3(aω) = 0.839 > p3(aMa) = 0.369). The estimation standard error (Se) of the aMa was found to be generally higher than of aω (Se1(aMa) = 2.251 > Se1(aω) = 0.786, Se2(aMa) = 1.236 > Se2(aω) = 0.231, Se3(aMa) = 0.696 < Se3(aω) = 0.755). Future studies should perform aω estimation based on body mass index and walking speed, as suggested by the higher correlation and lower standard error as compared to aMa. The number of subjects and walking speed scenarios should also be increased to reduce the standard error of control reference parameters estimation.

scholarly journals Relation of body mass index and body fatness to energy expenditure: longitudinal changes from preadolescence through adolescence

2004 ◽  
Vol 80 (5) ◽  
pp. 1262-1269 ◽  
Author(s):  
Linda G Bandini ◽  
Aviva Must ◽  
Sarah M Phillips ◽  
Elena N Naumova ◽  
William H Dietz
Keyword(s):  
Body Mass Index ◽  
Energy Expenditure ◽  
Body Mass ◽  
Body Fatness ◽  
Longitudinal Changes

Effects of Body Mass Index on Step Count Accuracy of Physical Activity Monitors

2012 ◽  
Vol 9 (4) ◽  
pp. 594-600 ◽  
Author(s):  
Yuri Feito ◽  
David R. Bassett ◽  
Dixie L. Thompson ◽  
Brian M. Tyo
Keyword(s):  
Physical Activity ◽  
Body Mass Index ◽  
Body Mass ◽  
Step Count ◽  
Activity Monitors ◽  
Wide Range ◽  
Step Counting ◽  
Physical Activity Monitors ◽  
High Level ◽  
Walking Speeds

Background:Activity monitors are widely used in research, and are currently being used to study physical activity (PA) trends in the US and Canada. The purpose of this study was to determine if body mass index (BMI) affects the step count accuracy of commonly used accelerometer-based activity monitors during treadmill walking.Methods:Participants were classified into BMI categories and instructed to walk on a treadmill at 3 different speeds (40, 67, and 94 m·min−1) while wearing 4 accelerometer-based activity monitors (ActiGraph GT1M, ActiCal, NL-2000, and StepWatch).Results:There was no significant main effect of BMI on pedometer accuracy. At the slowest speed, all waist-mounted devices significantly underestimated actual steps (P < .001), with the NL-2000 recording the greatest percentage (72%). At the intermediate speed, the ActiGraph was the least accurate, recording only 80% of actual steps. At the fastest speed, all of the activity monitors demonstrated a high level of accuracy.Conclusion:Our data suggest that BMI does not greatly affect the step-counting accuracy of accelerometer-based activity monitors. However, the accuracy of the ActiGraph, ActiCal, and NL-2000 decreases at slower speeds. The ankle-mounted StepWatch was the most accurate device across a wide range of walking speeds.

scholarly journals Physical Activity Variety, Energy Expenditure, and Body Mass Index

2014 ◽  
Vol 38 (4) ◽  
pp. 624-630 ◽  
Author(s):  
Hollie A. Raynor ◽  
Dale S. Bond ◽  
Jeremy Steeves ◽  
Dixie L. Thompson
Keyword(s):  
Physical Activity ◽  
Body Mass Index ◽  
Energy Expenditure ◽  
Body Mass
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