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Age-predicted maximal heart rate revisited.

Abstract：

OBJECTIVES:We sought to determine a generalized equation for predicting maximal heart rate (HRmax) in healthy adults. BACKGROUND:The age-predicted HRmax equation (i.e., 220 - age) is commonly used as a basis for prescribing exercise programs, as a criterion for achieving maximal exertion and as a clinical guide during diagnostic exercise testing. Despite its importance and widespread use, the validity of the HRmax equation has never been established in a sample that included a sufficient number of older adults. METHODS:First, a meta-analytic approach was used to collect group mean HRmax values from 351 studies involving 492 groups and 18,712 subjects. Subsequently, the new equation was cross-validated in a well-controlled, laboratory-based study in which HRmax was measured in 514 healthy subjects. RESULTS:In the meta-analysis, HRmax was strongly related to age (r = -0.90), using the equation of 208 - 0.7 x age. The regression equation obtained in the laboratory-based study (209 - 0.7 x age) was virtually identical to that obtained from the meta-analysis. The regression line was not different between men and women, nor was it influenced by wide variations in habitual physical activity levels. CONCLUSIONS:1) A regression equation to predict HRmax is 208 - 0.7 x age in healthy adults. 2) HRmax is predicted, to a large extent, by age alone and is independent of gender and habitual physical activity status. Our findings suggest that the currently used equation underestimates HRmax in older adults. This would have the effect of underestimating the true level of physical stress imposed during exercise testing and the appropriate intensity of prescribed exercise programs.

journal_name

J Am Coll Cardiol

journal_title

Journal of the American College of Cardiology

authors

Tanaka H,Monahan KD,Seals DR

doi

10.1016/s0735-1097(00)01054-8

subject

Has Abstract

pub_date

2001-01-01 00:00:00

pages

153-6

issue

1

eissn

0735-1097

issn

1558-3597

pii

S0735-1097(00)01054-8

journal_volume

37

pub_type

杂志文章,meta分析

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