Table 5. Treadmill Exercise Program II (including when CPET is not performed)

Exercise program
• Walk at a comfortable speed and 0% grade to reach a lower extremity pain scale of 2-3/4 points after 5-10 min.• When lower extremity pain develops, rest (in a sitting or standing position) until the pain disappears, and then repeat rest/exercise until the whole exercise time reaches about 60 min.• Continue the exercise in a similar manner until the cumulative exercise time is approximately 30-45 min out of the total exercise time of 60 min.• Increase the intensity gradually (0.2 km/h speed or 1% grade), when it is possible to walk continuously for more than 10 min.• Continue the exercise when lower extremity pain reaches 2-3/4 points after 5-10 min and the cumulative exercise time reaches to 30-45 min during 60 min.