title: Maintenance of the threshold/maximum heart rate quotient in swimmers.
abstract: The anaerobic threshold (AT) was calculated in 23 swimmers by field methods: MADER (MM) and modified exponential MADER (EM) and laboratory methods: SKINNER (SM), ROBERGS (RM), CONCONI (CM), and ventilatory (VM). Two types of test were designed. The first in a swimming pool (test 1), performing four series of increasing intensity swims, and the second on a cycle ergometer increasing until exhaustion (test 2). In both tests the heart rate (HR) was recorded in beats per minute by telemetry. Despite the different HR at the AT: 180.0 +/- 2.7 (MM), 179.1 +/- 2.4 (EM), 166.0 +/- 2.9 (SM), 157.0 +/- 2.8 (RM), 167.6 +/- 2.7 (VM) and 168.8 +/- 2.2 (CM), and the different maximum HR (HRmax) in the two tests: 201.6 +/- 2.0 in Test 1 and 188.5 +/- 1.6 in Test 2; the percentage HR in the AT/HRmax proved to be similar for all the methods except RM (88.0%-89.2%). The mechanism of organic control in progressive exercise can therefore have, in this test, a "threshold" zone at a given percentage of the maximum capacity of adaptation, both when the exercise is carried out in a pool and also on a cycle ergometer.
authors.affiliation: Facultad de Medicina, Universidad de Málaga, Spain.
authors.forename: V J
authors.initials: VJ
authors.lastname: Fernández-Pastor
authors.forename: F
authors.initials: F
authors.lastname: Pérez
authors.forename: J C
authors.initials: JC
authors.lastname: García
authors.forename: A M
authors.initials: AM
authors.lastname: Diego
authors.forename: F
authors.initials: F
authors.lastname: Guirado
authors.forename: N
authors.initials: N
authors.lastname: Noguer
mesh_terms: D000222:Adaptation, Physiological; D000293:Adolescent; D015308:Anaerobic Threshold; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D019344:Lactic Acid / Q000378:metabolism; D008297:Male; D013550:Swimming / Q000502:physiology*
chemical_list: D019344:Lactic Acid