Energy expenditure by heart rate in children: an evaluation of calibration techniques

MBE Livingstone, PJ Robson, M Toton

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Purpose: To evaluate the impact of applying seven calibration equations (CE) in the estimation of free-living total energy expenditure (TEE) over 2-3 d in seven boys (mean +/- SD age 9.4 +/- 0.4 yr) by the Flex heart rate (HR) method. Methods: HR and oxygen consumption were measured simultaneously for eight activities (lying, sitting, standing, arm-reaching exercise, a stooping-and-twisting exercise: stepping, treadmill walking/running, and cycle ergometry) carried out in sequence. CE were derived from various combinations of activities. Flex HRs were identified for each CE. Results: There were no significant differences in TEE estimates [range (mean +/- SD); 6.65 +/- 0.72 to 7.27 +/- 0.89 MJ.d(-1)] derived from any of the CE. Mean daytime HR ranged from 86 +/- 4 to 122 +/- 15 beats min(-1), and 82-98% of recorded daytime HR was less than or equal to 140 beats.min(-1). As a result, within-subject CV in TEE from each of the CE ranged from 2.2% to 8.9%. Mean between-subject Flex HR ranged from 94 +/- 8 to 111 +/- 8 beats min(-1). No significant differences were observed in corresponding TEE estimates. However, mean activity energy expenditure (AEE) ranged from 2.10 +/- 1.18 MJ.d(-1) (based on Flex HR 111 +/- 8 beats.min(-1)) to 3.55 +/- 1.44 MJ.d(-1) (based on Flex HR 94 +/- 8 beats.min(-1); NS). The corresponding estimates of resting energy expenditure (REE) were 1.89 +/- 0.82 MJ.d(-1) (Flex HR 111 +/- 8 beats.min(-1)) and 1.05 +/- 0.60 MJ.d(-1) (Flex HR 94 +/- 8 beats.min(-1)). Only the differences between the minimum and maximum estimates of REE were significant (P < 0.05. Conclusions: Unduly lengthy and complex calibration procedures for the estimation of Flex HR TEE may not be justified in most cases, particularly in sedentary children.
LanguageEnglish
Pages1513-1519
JournalMedicine and Science in Sports and Exercise
Volume32
Issue number8
Publication statusPublished - Aug 2000

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Energy Metabolism
Calibration
Heart Rate
Exercise
Ergometry
Oxygen Consumption
Running
Walking

Cite this

@article{18a4657ad00f47bca9eb0d5593f9475b,
title = "Energy expenditure by heart rate in children: an evaluation of calibration techniques",
abstract = "Purpose: To evaluate the impact of applying seven calibration equations (CE) in the estimation of free-living total energy expenditure (TEE) over 2-3 d in seven boys (mean +/- SD age 9.4 +/- 0.4 yr) by the Flex heart rate (HR) method. Methods: HR and oxygen consumption were measured simultaneously for eight activities (lying, sitting, standing, arm-reaching exercise, a stooping-and-twisting exercise: stepping, treadmill walking/running, and cycle ergometry) carried out in sequence. CE were derived from various combinations of activities. Flex HRs were identified for each CE. Results: There were no significant differences in TEE estimates [range (mean +/- SD); 6.65 +/- 0.72 to 7.27 +/- 0.89 MJ.d(-1)] derived from any of the CE. Mean daytime HR ranged from 86 +/- 4 to 122 +/- 15 beats min(-1), and 82-98{\%} of recorded daytime HR was less than or equal to 140 beats.min(-1). As a result, within-subject CV in TEE from each of the CE ranged from 2.2{\%} to 8.9{\%}. Mean between-subject Flex HR ranged from 94 +/- 8 to 111 +/- 8 beats min(-1). No significant differences were observed in corresponding TEE estimates. However, mean activity energy expenditure (AEE) ranged from 2.10 +/- 1.18 MJ.d(-1) (based on Flex HR 111 +/- 8 beats.min(-1)) to 3.55 +/- 1.44 MJ.d(-1) (based on Flex HR 94 +/- 8 beats.min(-1); NS). The corresponding estimates of resting energy expenditure (REE) were 1.89 +/- 0.82 MJ.d(-1) (Flex HR 111 +/- 8 beats.min(-1)) and 1.05 +/- 0.60 MJ.d(-1) (Flex HR 94 +/- 8 beats.min(-1)). Only the differences between the minimum and maximum estimates of REE were significant (P < 0.05. Conclusions: Unduly lengthy and complex calibration procedures for the estimation of Flex HR TEE may not be justified in most cases, particularly in sedentary children.",
author = "MBE Livingstone and PJ Robson and M Toton",
year = "2000",
month = "8",
language = "English",
volume = "32",
pages = "1513--1519",
journal = "Medicine and Science in Sports and Exercise",
issn = "0195-9131",
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Energy expenditure by heart rate in children: an evaluation of calibration techniques. / Livingstone, MBE; Robson, PJ; Toton, M.

In: Medicine and Science in Sports and Exercise, Vol. 32, No. 8, 08.2000, p. 1513-1519.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Energy expenditure by heart rate in children: an evaluation of calibration techniques

AU - Livingstone, MBE

AU - Robson, PJ

AU - Toton, M

PY - 2000/8

Y1 - 2000/8

N2 - Purpose: To evaluate the impact of applying seven calibration equations (CE) in the estimation of free-living total energy expenditure (TEE) over 2-3 d in seven boys (mean +/- SD age 9.4 +/- 0.4 yr) by the Flex heart rate (HR) method. Methods: HR and oxygen consumption were measured simultaneously for eight activities (lying, sitting, standing, arm-reaching exercise, a stooping-and-twisting exercise: stepping, treadmill walking/running, and cycle ergometry) carried out in sequence. CE were derived from various combinations of activities. Flex HRs were identified for each CE. Results: There were no significant differences in TEE estimates [range (mean +/- SD); 6.65 +/- 0.72 to 7.27 +/- 0.89 MJ.d(-1)] derived from any of the CE. Mean daytime HR ranged from 86 +/- 4 to 122 +/- 15 beats min(-1), and 82-98% of recorded daytime HR was less than or equal to 140 beats.min(-1). As a result, within-subject CV in TEE from each of the CE ranged from 2.2% to 8.9%. Mean between-subject Flex HR ranged from 94 +/- 8 to 111 +/- 8 beats min(-1). No significant differences were observed in corresponding TEE estimates. However, mean activity energy expenditure (AEE) ranged from 2.10 +/- 1.18 MJ.d(-1) (based on Flex HR 111 +/- 8 beats.min(-1)) to 3.55 +/- 1.44 MJ.d(-1) (based on Flex HR 94 +/- 8 beats.min(-1); NS). The corresponding estimates of resting energy expenditure (REE) were 1.89 +/- 0.82 MJ.d(-1) (Flex HR 111 +/- 8 beats.min(-1)) and 1.05 +/- 0.60 MJ.d(-1) (Flex HR 94 +/- 8 beats.min(-1)). Only the differences between the minimum and maximum estimates of REE were significant (P < 0.05. Conclusions: Unduly lengthy and complex calibration procedures for the estimation of Flex HR TEE may not be justified in most cases, particularly in sedentary children.

AB - Purpose: To evaluate the impact of applying seven calibration equations (CE) in the estimation of free-living total energy expenditure (TEE) over 2-3 d in seven boys (mean +/- SD age 9.4 +/- 0.4 yr) by the Flex heart rate (HR) method. Methods: HR and oxygen consumption were measured simultaneously for eight activities (lying, sitting, standing, arm-reaching exercise, a stooping-and-twisting exercise: stepping, treadmill walking/running, and cycle ergometry) carried out in sequence. CE were derived from various combinations of activities. Flex HRs were identified for each CE. Results: There were no significant differences in TEE estimates [range (mean +/- SD); 6.65 +/- 0.72 to 7.27 +/- 0.89 MJ.d(-1)] derived from any of the CE. Mean daytime HR ranged from 86 +/- 4 to 122 +/- 15 beats min(-1), and 82-98% of recorded daytime HR was less than or equal to 140 beats.min(-1). As a result, within-subject CV in TEE from each of the CE ranged from 2.2% to 8.9%. Mean between-subject Flex HR ranged from 94 +/- 8 to 111 +/- 8 beats min(-1). No significant differences were observed in corresponding TEE estimates. However, mean activity energy expenditure (AEE) ranged from 2.10 +/- 1.18 MJ.d(-1) (based on Flex HR 111 +/- 8 beats.min(-1)) to 3.55 +/- 1.44 MJ.d(-1) (based on Flex HR 94 +/- 8 beats.min(-1); NS). The corresponding estimates of resting energy expenditure (REE) were 1.89 +/- 0.82 MJ.d(-1) (Flex HR 111 +/- 8 beats.min(-1)) and 1.05 +/- 0.60 MJ.d(-1) (Flex HR 94 +/- 8 beats.min(-1)). Only the differences between the minimum and maximum estimates of REE were significant (P < 0.05. Conclusions: Unduly lengthy and complex calibration procedures for the estimation of Flex HR TEE may not be justified in most cases, particularly in sedentary children.

M3 - Article

VL - 32

SP - 1513

EP - 1519

JO - Medicine and Science in Sports and Exercise

T2 - Medicine and Science in Sports and Exercise

JF - Medicine and Science in Sports and Exercise

SN - 0195-9131

IS - 8

ER -