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Relationship between laboratory-measured variables and heart rate during an ultra-endurance triathlon

Citation

Laursen, PB and Knez, WL and Shing, CM and Langill, RH and Rhodes, EC and Jenkins, DG, Relationship between laboratory-measured variables and heart rate during an ultra-endurance triathlon, Journal of Sports Sciences, 23, (10) pp. 1111-1120. ISSN 0264-0414 (2005) [Refereed Article]

DOI: doi:10.1080/02640410400023209

Abstract

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, V̇O2peak = 4.75 ± 0.42 l · min-1) performed progressive exercise tests of cycle ergometry and treadmill running for the determination of peak oxygen uptake (V̇O 2peak), 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. © 2005 Taylor & Francis.

Item Details

Item Type:Refereed Article
Research Division:Psychology and Cognitive Sciences
Research Group:Psychology
Research Field:Sport and Exercise Psychology
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Cardiovascular System and Diseases
Author:Shing, CM (Dr Cecilia Kitic)
ID Code:47067
Year Published:2005
Web of Science® Times Cited:24
Deposited By:Health Sciences A
Deposited On:2007-09-11
Last Modified:2007-09-11
Downloads:0

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