Physiological assessment of isolated running does not directly replicate running capacity after triathlon-specific cycling

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Deutscher übersetzter Titel:Ausschließlich physiologische Bewertung der Laufleistung lässt keinen direkten Rückschluss auf die Laufkapazität nach einem thriathlon-spezifischen Radfahren zu
Autor:Etxebarria, Naroa; Hunt, Julie; Ingham, Steve; Ferguson, Richard
Erschienen in:Journal of sports sciences
Veröffentlicht:32 (2014), 3, S. 229-238, Lit.
Format: Literatur (SPOLIT)
Publikationstyp: Zeitschriftenartikel
Medienart: Gedruckte Ressource
Sprache:Englisch
ISSN:0264-0414, 1466-447X
DOI:10.1080/02640414.2013.819520
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Erfassungsnummer:PU201407006419
Quelle:BISp

Abstract

Triathlon running is affected by prior cycling and power output during triathlon cycling is variable in nature. We compared constant and triathlon-specific variable power cycling and their effect on subsequent submaximal running physiology. Nine well-trained male triathletes (age 24.6 ± 4.6 years, VO2peak 4.5 ± 0.4 L · min−1; mean ± SD) performed a submaximal incremental run test, under three conditions: no prior exercise and after a 1 h cycling trial at 65% of maximal aerobic power with either a constant or a variable power profile. The variable power protocol involved multiple 10–90 s intermittent efforts at 40–140% maximal aerobic power. During cycling, pulmonary ventilation (22%, ±14%; mean; ±90% confidence limits), blood lactate (179%, ±48%) and rating of perceived exertion (7.3%, ±10.2%) were all substantially higher during variable than during constant power cycling. At the start of the run, blood lactate was 64%, ±61% higher after variable compared to constant power cycling, which decreased running velocity at 4 mM lactate threshold by 0.6, ±0.9 km · h−1. Physiological responses to incremental running are negatively affected by prior cycling and, to a greater extent, by variable compared to even-paced cycling. Testing and training of triathletes should account foe higher physiological cost of triathlon-specific cycling and its effect on subsequent running.