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DOI: 10.1055/s-2003-45233
The Validity of Physiological Variables to Assess Training Intensity in Kayak Athletes
Publikationsverlauf
Accepted after revision: March 7, 2003
Publikationsdatum:
29. Januar 2004 (online)
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Abstract
It appears that training benefits are compromised if excessive training is performed at intensities that are either too low or too high. This suggests a need for accurate methods to monitor training intensity. It has been suggested that heart rate (HR) or lactate concentration ([La-]) can be used to accurately monitor training intensity. The purpose of the present study therefore, was to examine whether the relationship between HR, [La-] and intensity determined during a kayak graded exercise test (GXT) remained stable during constant-intensity kayak exercise. Sixteen trained kayak paddlers, (22 ± 4 y, peak V·O2 = 3.7 ± 0.9 l × min-1) performed a GXT on a wind-braked kayak ergometer. They then performed a 20-min constant-load test on the kayak ergometer at a power output corresponding to their lactate inflection (LI) intensity. Eight subjects also performed a 20-min constant-load test at a power output corresponding to their lactate threshold (LT) intensity. Differences between constant-load and GXT values were determined using one-way ANOVA (p < 0.05). There were no significant differences between values for HR and V·O2 derived from the GXT and those measured during both constant-load tests. However, while [La-] also provided a valid marker of the LI training intensity (1.8 ± 0.3 v 2.1 ± 0.8 mmol × l-1), [La-] did not provide a valid marker of the LT training intensity (3.8 ± 0.7 v 5.1 ± 1.4 mmol × l-1). These results suggest that HR, but not [La-1], is similar during both a GXT and constant-load exercise at the LT intensity.
Key words
Heart rate - lactate threshold - monitoring training
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D. Bishop Ph D
School of Human Movement and Exercise Science · University of Western Australia
Crawley · WA · 6009 Australia ·
Telefon: +61 (08) 9380 7282
Fax: +61 (08) 9380 1039
eMail: dbishop@cyllene.uwa.edu.au