Derchak, P. A., Gavin, T. P., & Stager, J. M. (1997). Different predictors of maximal exercise stroke volume in trained and untrained subjects. Medicine and Science in Sports and Exercise, 29(5), Supplement abstract 285.

In a study designed to identify the best non-exercising predictor of maximum stroke volume for both trained and untrained individuals, the following were found.

1. In trained individuals, stroke volume did not plateau until 80% VO2max was elicited.
2. In trained individuals, resting stroke volume was the best predictor of maximum stroke volume.
3. In untrained individuals, stroke volume plateaued earlier at 60% VO2max.
4. In untrained individuals, supine stroke volume was the best predictor of maximum stroke volume.

Implication. Training changes the nature and the response level of stroke volume. Since it plateaus at 80% VO2max it is likely to be a more important aspect of the cardiovascular response to training than previously thought.

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