Relationship between laboratory-measured variables and heart rate during an ultra-endurance triathlon
Deutscher übersetzter Titel: | Beziehung zwischen den Labormesswerten und der Herzfrequenz während eines Ultra-Triathlons |
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Autor: | Laursen, Paul B.; Knez, Wade L.; Shing, Cecilia M.; Langill, Robert H.; Rhodes, Edward C.; Jenkins, David G. |
Erschienen in: | Journal of sports sciences |
Veröffentlicht: | 23 (2005), 10, S. 1111-1120, Lit. |
Format: | Literatur (SPOLIT) |
Publikationstyp: | Zeitschriftenartikel |
Medienart: | Gedruckte Ressource |
Sprache: | Englisch |
ISSN: | 0264-0414, 1466-447X |
DOI: | 10.1080/02640410400023209 |
Schlagworte: | |
Online Zugang: | |
Erfassungsnummer: | PU201312008910 |
Quelle: | BISp |
Abstract des Autors
The aim of the present study was to examine the relationship between the performance heart rate during an ultra-endurance triathlon and the heart rate corresponding to several demarcation points measured during laboratory-based progressive cycle ergometry and treadmill running. Less than one month before an ultra-endurance triathlon, 21 well-trained ultra-endurance triathletes (mean ± s: age 35 ± 6 years, height 1.77 ± 0.05 m, mass 74.0 ± 6.9 kg,
= 4.75 ± 0.42 l · min−1) performed progressive exercise tests of cycle ergometry and treadmill running for the determination of peak oxygen uptake (
), heart rate corresponding to the first and second ventilatory thresholds, as well as the heart rate deflection point. Portable telemetry units recorded heart rate at 60 s increments throughout the ultra-endurance triathlon. Heart rate during the cycle and run phases of the ultra-endurance triathlon (148 ± 9 and 143 ± 13 beats · min−1 respectively) were significantly (P < 0.05) less than the second ventilatory thresholds (160 ± 13 and 165 ± 14 beats · min−1 respectively) and heart rate deflection points (170 ± 13 and 179 ± 9 beats · min−1 respectively). However, mean heart rate during the cycle and run phases of the ultra-endurance triathlon were significantly related to (r = 0.76 and 0.66; P < 0.01), and not significantly different from, the first ventilatory thresholds (146 ± 12 and 148 ± 15 beats · min−1 respectively). Furthermore, the difference between heart rate during the cycle phase of the ultra-endurance triathlon and heart rate at the first ventilatory threshold was related to marathon run time (r = 0.61; P < 0.01) and overall ultra-endurance triathlon time (r = 0.45; P < 0.05). The results suggest that triathletes perform the cycle and run phases of the ultra-endurance triathlon at an exercise intensity near their first ventilatory threshold. Verf.-Referat