Relationship between the talk test and ventilatory threshold during stochastic exercise
Abstract
Previous studies with a variety of populations have demonstrated that the ventilatory
threshold is closely associated with the highest exercise intensity at which subjects may
speak comfortably, the Talk Test (TT). These studies have all been conducted using
incremental exercise sessions rather than stochastic exercise sessions. In this study, the
relationship between the TT and ventilatory threshold during stochastic exercise was
evaluated. Subjects @J=18) performed incremental exercise with gas exchange to define
VT. Following the initial test, subjects performed the same incremental test with the TT
(Pledge of Allegiance). The last two tests were 30-minute stochastic exercise sessions
with gas exchange and then with the TT. The subjects ability to speak during stochastic
exercise matched expected responses relatively well: (vs VO2 as %VT, 73%), (vs V02 at
last positive (LP) stage of the TT, 75%), (vs HR at VT, 69%), (vs HR at LP, 66%), (vs Br
at VT, 51%), and (vs Brat LP, 39%). The results suggest that the TT is a good measure of
intensity during stochastic exercise, although not as good as predicted from previous
studies based on incremental exercise.
Subject
Anaerobiosis
Respiration - Measurement
Exercise - Physiological aspects