Document Detail

Reliability and variability of indicators of heart-rate monitoring in children.
MedLine Citation:
PMID:  8455456     Owner:  NLM     Status:  MEDLINE    
We describe the daily heart-rate patterns and the between-day and within-day reliabilities of several heart rate indicators measured in 131 Anglo-, African-, and Mexican-American children aged 5-7 yr. Heart rates were measured over 12 waking hours with a Quantum XL Telemetry heart rate monitor. The percent of heart rates 25% above resting heart rate, an index of physical activity heart rate (PAHR-25 index), was found to have the highest within-day (0.92) and between-day (0.81) reliabilities. The Spearman-Brown prophecy formula indicated that only 9.3 h of observation would be needed to maintain a within-day reliability of 0.90. The percentage of heart rates 50% above resting heart rate (PAHR-50) was found to have slightly lower within-day (0.88) and between-day (0.56) reliability. Principal components analysis revealed that the PAHR-25 and PAHR-50 indicies only had one component throughout the day. The PAHR-25 and PAHR-50 indicies were weakly correlated with age, suggesting that they may be good indicators of relative PAHR. Male children had higher (P < or = 0.025) PAHR-25 index scores than females. There were no gender or ethnic differences in the PAHR-50 index.
R H Durant; T Baranowski; H Davis; T Rhodes; W O Thompson; K A Greaves; J Puhl
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  25     ISSN:  0195-9131     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  1993 Mar 
Date Detail:
Created Date:  1993-04-20     Completed Date:  1993-04-20     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  389-95     Citation Subset:  IM; S    
Department of Pediatrics, Medical College of Georgia, Augusta 30912.
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MeSH Terms
African Americans
Age Factors
Analysis of Variance
Chi-Square Distribution
Child, Preschool
Circadian Rhythm
European Continental Ancestry Group
Exercise / physiology
Heart Rate / physiology*
Mexican Americans
Physical Exertion / physiology*
Physical Fitness / physiology*
Reproducibility of Results
Sex Factors
Telemetry / instrumentation*
Time Factors
Grant Support
35131//PHS HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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