Research article summary (published 21 Jan 2008):

Predicting lactate threshold using ventilatory threshold.

Full Abstract

Lactate threshold is an important reference point when setting training intensities for endurance athletes. Ventilatory threshold has been used as a noninvasive estimate of lactate threshold, but appears to underestimate training intensity for many athletes. This study evaluated whether data obtained during a noninvasive, maximal exercise test could be used to predict lactate threshold. Maximal oxygen consumption (55+/-2 ml O(2) x kg(-1) x min(-1)) and heart rate at the ventilatory threshold (V-slope method) were determined for 19 cyclists (10 men, 9 women, 35+/-2 years). Cyclists also performed a lactate threshold test, consisting of 8 min stages at power outputs below, at, and above the ventilatory threshold. Heart rate associated with the lactate threshold was determined using the Dmax method. The correlation coefficient between heart rates at the ventilatory and lactate thresholds was 0.67, indicating 45% shared variance. The best fitting model to predict heart rate at the lactate threshold included heart rate at the ventilatory threshold, gender, body weight, and an interaction between gender and body weight. Using this model, R(2) was 0.70. Thus, heart rate at the ventilatory threshold may be adjusted to more accurately predict a heart rate that corresponds to the lactate threshold for recreational cyclists.

Author information

Author/s: Plato, P A (PA); McNulty, M (M); Crunk, S M (SM); Tug Ergun, A (A);

Affiliation: Department of Kinesiology, San Jose State University, San Jose, California 95192-0054, United States. plato(-atsign-)kin.sjsu.edu

Journal and publication information

Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't

Journal: International journal of sports medicine (Int J Sports Med), published in Germany. (Language: eng)

Reference: 2008-Sep; vol 29 (issue 9) : pp 732-7

Dates: Created 2008/08/06; Completed 2009/01/16;

PMID: 18214811, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adult Anaerobic Threshold - physiology Bicycling - physiology Exercise Test Exercise Tolerance - physiology Female Heart Rate Humans

Lactic Acid - blood Male Muscle Contraction - physiology Muscle, Skeletal - physiology Oxygen Consumption - physiology Predictive Value of Tests Pulmonary Gas Exchange - physiology Regression Analysis

Associated Chemicals: Lactic Acid (50-21-5)

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