The talk test as a marker of exercise training intensity.
OBJECTIVE
Correlative data have suggested that the Talk Test (TT) may be a surrogate of the ventilatory threshold (VT). This study examined manipulations of either the VT or exercise protocol to test the hypothesis that the TT and VT are related in a robust way, adequate for exercise prescription.


METHODS
Healthy young adults participated in 4 independent series of experiments designed to decrease (blood donation) or increase (training) VT, or to systematically vary the exercise intensity above and below VT. These interventions were matched to responses of the TT.


RESULTS
The changes in the exercise intensity at VT and at the last positive stage of the TT matched each other following both blood donation and training. When exercise intensity was varied above and below VT, the predicted ability to speak was well matched to observations of the TT. Predictive errors biased toward passing the TT when exercise intensity was greater than VT. The time required for the result of TT to become negative when exercise intensity was more than VT, decreased with increasing intensity but averaged more than the 2 minutes that has been used in previous studies.


CONCLUSIONS
This study confirms the robust relationship between VT and the TT during various interventions and suggests that the TT is suitable for exercise prescription.
Foster
Carl
C
Department of Exercise and Sport Science, University of Wisconsin La Crosse, La Crosse, WI 54601, USA. foster.carl@uwlax.edu
Porcari
John P
JP
Anderson
Jennifer
J
Paulson
Melissa
M
Smaczny
Denise
D
Webber
Holly
H
Doberstein
Scott T
ST
Udermann
Brian
B
D000328:Adult; D015308:Anaerobic Threshold; D000704:Analysis of Variance; D001782:Blood Donors; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test / Q000379:methods*; D005081:Exercise Therapy; D017079:Exercise Tolerance; D005260:Female; D006400:Hematocrit; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D010806:Physical Education and Training; D010807:Physical Endurance; D013060:Speech