Int J Sports Med 2007; 28(5): 414-419
DOI: 10.1055/s-2006-924513
Training & Testing

© Georg Thieme Verlag KG Stuttgart · New York

Assessment of Maximal Aerobic Power and Critical Power in a Single 90-s Isokinetic All-Out Cycling Test

G. Brickley1 , J. Dekerle1 , A. J. Hammond1 , J. Pringle1 , H. Carter1
  • 1Chelsea School Research Centre, University of Brighton, East Sussex, United Kingdom
Further Information

Publication History

Accepted after revision: July 20, 2006

Publication Date:
16 November 2006 (online)

Abstract

The purpose of this study was to establish the validity of a 90-s all-out test for the estimation of maximal oxygen uptake (V·O2max) and submaximal aerobic ability as represented by critical power. We hypothesized that the fall in power output by the end of the 90-s all-out test (end power) would represent the exhaustion of anaerobic work capability, and as such, would correspond with the critical power. Sixteen active individuals (mean ± SD: 30 ± 6 years; 69.6 ± 9.9 kg) carried out a series of tests: (i) an incremental ramp test to determine V·O2max, (ii) three fixed-work rate trials to exhaustion to determine critical power, and (iii) two 90-s all-out tests to measure end power and peak V·O2. End power (292 ± 65 W) was related to (r = 0.89) but was significantly higher (p < 0.01) than critical power (264 ± 50 W). The mean ± 95 % limits of agreement (29 ± 65 W) were too low to use these variables interchangeably. The peak V·O2 in the 90-s trial was significantly lower than the V·O2max (3435 ± 682 ml · min-1 vs. 3929 ± 784 ml · min-1; p < 0.01); mean ± 95 % limits of agreement was equal to 495 ± 440 mL · min-1. The 90-s all-out test cannot, therefore, assess both V·O2max and critical power in adult performers. The duration of all-out exercise required to allow V·O2 to attain its maximum is longer than 90 s.

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Ph.D. Gary Brickley

University of Brighton

Gaudick Road, Eastbourne

East Sussex, BN20 7SP

England

Phone: + 44 12 73 64 37 60

Email: g.brickley@bton.ac.uk