A physiological description of critical velocity

  • D. W. Hill
  • C. S. Ferguson
SHORT COMMUNICATION

Abstract

Although critical velocity (CV) provides a valid index of aerobic function, the physiological significance of CV is not known. Twelve individuals performed exhaustive runs at 95% to 110% of the velocity at which O2max was attained in an incremental test. O2max was elicited in each run. Using the time to exhaustion at each velocity, CV was calculated for each participant. Using the time to achieve O2max at each velocity, which was shorter at higher velocities, a parameter we have designated as CV′ was calculated for each participant. During exercise at or below CV′, O2max cannot be elicited. CV (238 ± 24 m · min−1) and CV′ (239 ± 25 m · min−1) were equal (t = 0.60, p = 0.56) and correlated (r = 0.97, p < 0.01). These results demonstrate that CV is the threshold intensity above which exercise of sufficient duration will lead to attainment of O2max.

Key words Critical power Slow component O2max 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • D. W. Hill
    • 1
  • C. S. Ferguson
    • 1
  1. 1.Department of Kinesiology, University of North Texas PO Box 311337, Denton, TX 76203-1337 USA Tel: +940-565-2252 Fax: +940-565-4904 e-mail: dhill@coefs.coe.unt.eduUS

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