NDLI: Anaerobic contribution to the time to exhaustion at the minimal exercise intensity at which maximal oxygen uptake occurs in elite cyclists, kayakists and swimmers

Content Provider	Springer Nature Link
Author	Faina, M. Billat, V. Squadrone, R. Angelis, M. De Koralsztein, J. P. Monte, A. Dal
Copyright Year	1997
Abstract	Using 23 elite male athletes (8 cyclists, 7 kayakists, and 8 swimmers), the contribution of the anaerobic energy system to the time to exhaustion (t lim) at the minimal exercise intensity (speed or power) at which maximal oxygen uptake (V˙O2 max) occurs (I V˙O2 max) was assessed by analysing the relationship between the t lim and the accumulated oxygen deficit (AOD). After 10-min warming up at 60% of V˙O2 max, the exercise intensity was increased so that each subject reached his I V˙O2max in 30 s and then continued at that level until he was exhausted. Pre-tests included a continuous incremental test with 2 min steps for determining the I V˙O2max and a series of 5-min submaximal intensities to collect the data that would allow the estimation of the energy expenditure at I V˙O2max . The AOD for the t lim exercise was calculated as the difference between the above estimation and the accumulated oxygen uptake. The mean percentage value of energy expenditure covered by anaerobic metabolism was 15.2 [(SD 6)%, range 8.9–24.1] with significant differences between swimmers and kayakists (16.8% vs 11.5%, P≤0.05) and cyclists and kayakists (16.4% vs 11.5%, P≤0.05). Absolute AOD values ranged from 26.4 ml · kg−1 to 83.6 ml · kg−1 with a mean value of 45.9 (SD 18) ml · kg−1. Considering all the subjects, the t lim was found to have a positive and significant correlation with AOD (r = 0.62, P≤0.05), and a negative and significant correlation with V˙O2 max (r = −0.46, P≤0.05). The data would suggest that the contribution of anaerobic processes during exercise performed at I V˙O2max should not be ignored when t lim is used as a supplementary parameter to evaluate specific adaptation of athletes.
Starting Page	13
Ending Page	20
Page Count	8
File Format	PDF
ISSN	03015548
Journal	European Journal of Applied Physiology
Volume Number	76
Issue Number	1
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	1997-06-26
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Physiology Public Health, Environmental and Occupational Health

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