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Heart rate during bicycle ergometer exercise in watts per kilogram body weight of 12 and 13 year old boys

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Zeitschrift für Kinderheilkunde Aims and scope Submit manuscript

Abstract

Purpose. The purpose of this study was

  1. 1.

    To check wether subjects reached a constant heart rate (f h ) during 6 min constant work load (\(\dot W\)) at 3 submaximal levels of intensity.

  2. 2.

    To investigate the comparability of functional load in boys of same age with different body weight as response to external load in watts per kilogram body weight.

  3. 3.

    To calculate the regression equation(s) with \(\dot W\) as independent variable and f h as dependent variable.

Methods. External load: bicycle ergometer exercise, 3 discontinuous series of increasing loads, 1.0, 1.5, and 2.0 W/kg, duration 6 min each with intermittent rest periods of 1 min. Functional load: R-R interval (msec) from precordial E.C.G. Subjects: 12 and 13 year old schoolboys, n=80, divided into body weight groups of 30, 35, 40, 50 and above 50 kg.

Results

  1. 1.

    During the last four 30 sec periods of each workload no constant R-R interval could be established; the decrease was significant at p=0.001.

  2. 2.

    No significant differences (p>0.05) in mean heart rate at 3 work loads could be proved between the 6 weight groups; the total variance is mainly explained by variance between subjects in same weight group (55%) and by variance with in subjects (35%).

  3. 3.

    The \(\dot W\) 170 of all subjects, calculated from the regression equation was 2.0 W/kg body weight.

Zusammenfassung

Ziel. Das Ziel war, die Vergleichbarkeit zu untersuchen von Arbeitsfähigkeit und Arbeitsbelastung, in Watt per Kilogramm Körpergewicht, bei Jungen im gleichen Alter, aber mit unterschiedlichem Körpergewicht.

Methoden. Arbeitsbelastung: Fahrradergometer-Arbeit in 3 Reihen, Belastungen, die je 6 min dauern von 1,0, 1,5 und 2,0 W/kg, mit einer Pause von je 1 min zwischen den Reihen. Arbeitsfähigkeit: R-R-Intervall (msec) von präkordialem EKG. Personen: 12- und 13jährige Schüler, n=80, verteilt in Körpergewichtsgruppen von 30, 35, 40, 45, 50 und über 50 kg.

Ergebnisse

  1. 1.

    Während der letzten der letzten vier 30 sec-Perioden von jeder Belastung konnte kein konstantes R-R-Intervall bestätigt werden; die Abnahme war signifikant mit p=0,001.

  2. 2.

    Zwischen den 6 Körpergewichtsgruppen konnten keine signifikanten Unterschiede (p>0,05) in mittlerer Herzfrequenz bei den 3 Belastungen nachgewiesen werden; die ganze Varianz konnte hauptsächlich erklärt werden durch Varianz zwischen Personen in derselben Körpergewichtsgruppe (55%) und durch Varianz innerhalb der Personen (35%).

  3. 3.

    Die körperliche Leistungsfähigkeit (W170) von allen Personen, berechnet aus der Regressionsgleichung, war 2,0 \(\dot W\) Kilogramm Körpergewicht.

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Authors and Affiliations

  1. Laboratory of Psychophysiology and Coronel Laboratory, University of Amsterdam, Amsterdam, The Netherlands

    H. C. G. Kemper

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  1. H. C. G. Kemper
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Kemper, H.C.G. Heart rate during bicycle ergometer exercise in watts per kilogram body weight of 12 and 13 year old boys. Z. Kinder-Heilk. 113, 161–169 (1972). https://doi.org/10.1007/BF00464619

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  • DOI: https://doi.org/10.1007/BF00464619

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