<qa>  How many minutes will the gait training exercise be used?8. Gait training: It consists of moderate gait training exercise for 20 minutes. To ensure that the exercise will be performed at moderate intensity will be used the 64 - 76 of maximum heart rate HRmax 220-age. Heart rate will be monitored every three minutes through a heart polar. In addition will be monitored perceived effort, gait speed and incline of the treadmill. The Borg scale will be used to evaluate perceived effort. This is an analogue scale graded from 6 light exercise to 20 points exhaustive exercise. Information about the exercise on the treadmill will be noted in the evolution record. 