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Am J Hum Biol. 2013 Sep-Oct;25(5):695-701. doi: 10.1002/ajhb.22431. Epub 2013 Aug 1.

Measured maximal heart rates compared to commonly used age-based prediction equations in the Heritage Family Study.

Author information

1
Human Genomics Laboratory, Pennington Biomedical Research Center, Baton Rouge, Louisiana, 70808.

Abstract

OBJECTIVE:

The purpose of this study was to examine how well two commonly used age-based prediction equations for maximal heart rate (HRmax ) estimate the actual HRmax measured in Black and White adults from the HERITAGE Family Study.

METHODS:

A total of 762 sedentary subjects (39% Black, 57% Females) from HERITAGE were included. HRmax was measured during maximal exercise tests using cycle ergometers. Age-based HRmax was predicted using the Fox (220-age) and Tanaka (208 - 0.7 × age) formulas.

RESULTS:

The standard error of estimate (SEE) of predicted HRmax was 12.4 and 11.4 bpm for the Fox and Tanaka formulas, respectively, indicating a wide-spread of measured-HRmax values are compared to their age-predicted values. The SEE (shown as Fox/Tanaka) was higher in Blacks (14.4/13.1 bpm) and Males (12.6/11.7 bpm) compared to Whites (11.0/10.2 bpm) and Females (12.3/11.2 bpm) for both formulas. The SEE was higher in subjects above the BMI median (12.8/11.9 bpm) and below the fitness median (13.4/12.4 bpm) when compared to those below the BMI median (12.2/11.0 bpm) and above the fitness median (11.4/10.3) for both formulas.

CONCLUSION:

Our findings show that based on the SEE, the prevailing age-based estimated HRmax equations do not precisely predict an individual's measured-HRmax .

PMID:
23913510
PMCID:
PMC3935487
DOI:
10.1002/ajhb.22431
[Indexed for MEDLINE]
Free PMC Article

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