Skip Navigation LinksHome > June 1996 - Volume 28 - Issue 6 > Predicting functional capacity during treadmill testing inde...
Medicine & Science in Sports & Exercise:
Applied Sciences: Physical Fitness and Performance

Predicting functional capacity during treadmill testing independent of exercise protocol

FOSTER, CARL; CROWE, AMY J.; DAINES, ERIN; DUMIT, MAURICE; GREEN, MEGAN A.; LETTAU, STACEY; THOMPSON, NANCY N.; WEYMIER, JEAN

Collapse Box

Abstract

Clinically useful estimates of ˙VO2max from treadmill tests(GXT) may be made using protocol-specific equations. In many cases, GXT may proceed more effectively if the clinician is free to adjust speed and grade independent of a specific protocol. We sought to determine whether˙VO2max could be predicted from the estimated steady-state˙VO2 of the terminal exercise stage. Seventy clinically stable individuals performed GXT with direct measurement of ˙VO2. Exercise was incremented each minute to optimize clinical examination. Measured˙VO2max was compared to the estimated steady-state ˙VO2 of the terminal stage based on ACSM equations. Equations for walking or running were used based on the patient's observed method of ambulation. The measured ˙VO2max was always less than the ACSM estimate, with a regular relationship between measured and estimated ˙VO2max. No handrail support: ˙VO2max = 0.869·ACSM - 0.07; R2 = 0.955, SEE = 4.8 ml·min-1·kg-1 (N = 30). With handrail support: ˙VO2max = 0.694·ACSM + 3.33; R2 = 0.833, SEE = 4.4 ml·min-1·kg-1(N = 40). The equations were cross-validated with 20 patients. The correlation between predicted and observed values was r = 0.98 and 0.97 without and with handrail support, respectively. The mean absolute prediction error (3.1 and 4.1 ml·min-1·kg-1) were similar to protocol-specific equations. We conclude that ˙VO2max can be predicted independent of treadmill protocol with approximately the same error as protocol-specific equations.

©1996The American College of Sports Medicine

Login

Article Tools

Share

Search for Similar Articles
You may search for similar articles that contain these same keywords or you may modify the keyword list to augment your search.

Connect With Us