Acute Effects After Stretching Respiratory Muscles on Ventilatory Pattern and Volume Distribution of Chest Wall

"Respiratory Muscles Stretching The stretching will occur throughout the expiratory phase to allow respiratory muscles to reach their maximal length, and two sets with 10 consecutive incursions will be use for each stretching pattern with an interval of 30 seconds between series.~Pattern 1: Neck stretching Pattern 2: Upper chest stretching Pattern 3:Pectoralis major stretching Pattern 4:Lateral chest stretching"

Control Group - all volunteers will be positioned at rest in a comfortable in a chair during 20 minutes.