Relationship between the lactate and ventilatory thresholds during prolonged exercise

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Deutscher übersetzter Titel:Beziehung zwischen Laktat- und ventilatorischer Schwelle waehrend Ausdauerbelastung
Autor:Loat, Christopher E.R.; Rhodes, E.C.
Erschienen in:Sports medicine
Veröffentlicht:15 (1993), 2, S. 104-115, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource Elektronische Ressource (online)
Sprache:Englisch
ISSN:0112-1642, 1179-2035
DOI:10.2165/00007256-199315020-00004
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Erfassungsnummer:PU199304063457
Quelle:BISp

Abstract

The anaerobic threshold is commonly measured by either blood lactate (lactate threshold) or ventilatory gases (ventilatory threshold); however, the relationship between these 2 methods is not conclusive. Despite the apparent causal relationship between the stimulation of the ventilatory chemoreceptors and ultimately the ventilatory response and the accumulation of protons in the circulating blood, evidence does exist which refutes such a connection. Such evidence supporting a coincidental relationship examines no significant change in ventilation with significant increases in blood lactate concentration. Conversely, evidence from patients with McArdles disease indicates that although no lactic acid is produced, these individuals do experience a threshold-like ventilatory response during incremental exercise. The ability to perform at the anaerobic threshold is now recognised as an integral component of endurance events. Several studies have concluded that the ventilatory threshold is highly correlated with endurance performance, in distances ranging from 26 miles (41.6 km) (r = -0.94) to 5 and 10 km (r = -0.945). The lactate threshold, in particular the individual anaerobic threshold, has been examined from a performance standpoint. Much of the literature supports the individual anaerobic threshold as the exercise intensity at which performance is maximal and able to be sustained for at least 50 minutes. Verf.-Referat (gekuerzt)