Upon feeling
capable of proceeding, the participant continued to walk until
completing the entire 15 minutes. Adjustments in the training
intensity were made according to symptoms (dyspnoea and
fatigue between 4 and 6 on the Borg scale)19 and/or 70% of the
predicted maximum heart rate, which was established using
Karvonen’s equation.If a participant reported a dyspnoea score <
4 and/or the heart rate remained below the rate established by
Karvonen’s equation, the speed of the walk was increased the
following day, and if dyspnoea was > 6 and/or the heart rate was
above the rate established in the equation, the speed of the walk
was diminished the following day.