Caffeine ingestion attenuates the Vo2 slow component during intense exercise

Santalla Hernández, Alfredo; Lucía Mulas, Alejandro; Pérez Ruiz, Margarita

doi:10.2170/jjphysiol.51.761

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Caffeine ingestion attenuates the Vo2 slow component during intense exercise

Santalla Hernández, Alfredo; Lucía Mulas, Alejandro; Pérez Ruiz, Margarita

Use this identifier to cite or link to this item: http://hdl.handle.net/11268/5724

Date: 2001

UNESCO Subject: Fisiología humana
UNESCO Subject: Medicina deportiva

Type: article

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Abstract:

The purpose of this study was to analyze the effects of caffeine ingestion on the slow component of oxygen uptake (ΔVO2) during high-intensity endurance exercise. Nine subjects (8 male and 1 female; age: 21±1 years; VO2max: 57.9±l.5ml kg-1min-1) performed two 9-min tests on a treadmill at a running velocity eliciting 90% of their VO2max, 60 min after ingesting either a placebo capsule (PLAC) or a capsule containing a caffeine dose of 5 mg (kg body mass)-1 [CAFF]. The mean values of ΔVO2 were significantly lower in CAFF than in PLAC (83±31 ml min-1 vs. 167±26 ml min-1, respectively; p<0.05). These findings suggest that the ergogenic effect of caffeine in a high-intensity endurance exercise shown in previous research may be partly mediated by a possible attenuation of the VO2 slow component.

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