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Physikalische Medizin, Rehabilitationsmedizin, Kurortmedizin 2013; 23(04): 225-230
DOI: 10.1055/s-0033-1347205
Wissenschaft und Forschung
© Georg Thieme Verlag KG Stuttgart · New York

Eignung des hochfrequenten Spektralbandes der Herzratenvariabilität für die Leistungsdiagnostik im Wasser

High Power Spectral Density of Heart Rate Variability as a Measure of Exercise Performance in Water
M. Fenzl
1   Resortragaz, Medizinisches Zentrum, Bad Ragaz, Schweiz
,
C. Schlegel
2   Resortragaz, Swiss Olympic Medical Center, Bad Ragaz, Schweiz
,
B. Villiger
3   Schweizer Paraplegiker-Zentrum, CEO, Nottwil, Schweiz
,
N. Aebli
4   Schweizer Paraplegiker-Zentrum, CTU, Nottwil, Schweiz
,
J. Gredig
5   Swissrehamed, Chur, Schweiz
,
J. Krebs
4   Schweizer Paraplegiker-Zentrum, CTU, Nottwil, Schweiz
› Author Affiliations
Further Information

Publication History

eingereicht: 13 February 2013

angenommen: 06 May 2013

Publication Date:
13 August 2013 (online)

Also available at
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Zusammenfassung

Problemstellung:

In der Sportmedizin bestehen zum Herzratenvariabilität (HRV) – Schwellenkonzept keine vergleichenden experimentellen Grundlagen mit Standardtestverfahren im Wasser.

Methode:

Bei 12 anamnestisch gesunden und trainierten Probanden wurde während Ergometerbelastungen (Arm-/Beindrehkurbel) im Wasser und an Land spirografisch der Gasstoffwechsel gemessen. Zeitsynchron mit der Erfassung respiratorischer Parameter wurde die hochfrequente Komponente der HRV (logarhithmierte HF-Leistung, lnHF) mit einem EKG auf jeder Belastungsstufe zeitkontinuierlich aufgezeichnet. Aus dem Produkt lnHF und der Zentralherzfrequenz wurde verlaufskinetisch die Leistung (Watt) an der respiratorischen Schwelle 2 quantitativ bestimmt und mit der reliablen Messmethodik der Gasanalyse verglichen.

Ergebnis:

Die Differenzen der mittleren Leistungskennwerte unterscheiden sich nicht (p>0,05). Der mittlere Bias weicht nur wenig von Null ab (−0,6 Watt). Die Übereinstimmungsgrenzen liegen zwischen −20,1 und 18,8 Watt.

Diskussion:

Auf der Basis eines quantitativen Vergleichs der Leistungskennwerte stimmt das HRV-Schwellenkonzept mit dem respiratorischen Referenzverfahren auch bei Arm-/Bein-Drehkurbelarbeit im Wasser gut überein.

Abstract

Objectives:

Heart rate variability (hrv) is an established parameter for analyzing performance in sports medicine. However, no valid data are available for standard test situations in water.

Methods:

12 trained healthy persons performed maximal graded exercise tests on a whole body cycling ergometer. Gas exchange (VO2, VCO2) and the vagally modulated short time variability parameter lnHF were monitored with a Holter device during each step. The expired air and lnHF were analyzed for exceeding anaerobic energy expenditure (ventilatory threshold 2, VT2) and compared with each other.

Results:

There was no significant difference between the means of the VT2 determined by the 2 different methods (p>0.05), and the bias was close to zero (−0.6 Watt). The confidence interval (1.96 SD) of the mean differences has been found to be between −20.1 and 18.8 Watts.

Discussion:

The quantitative comparison of gas exchange measurements with hrv showed a strong correlation between both parameters on a whole body ergometer in water. Both methods can be used interchangeably.

Schlüsselwörter

Assessmentinstrumente - Belastungssteuerung - Herzratenvariabilität - anaerobe Schwelle

Key words

assessment instruments - aquatic exercise - heart rate variability - anaerobic threshold
 

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