Manual Diaphragm release technique (sham) In attempt to execute the sham protocol the therapist performs manual contact (pisiform, ulnar edge and the last three fingers) with the underside of the costal cartilage of the 7th, 8th, 9th and 10th rib. The therapist will hold only light touch in the landmarks, without exerting pressure or traction. The maneuver will be performed in two sets of ten deep breaths, with an one minute interval between them.

All patients will receive the Manual Diaphragm Release Technique, during 6 days of treatment. They will undertake four evaluations throughout treatment: before and immediately after the Day 1 (Baseline 1 and Post 1) and before and after Day 6 (Baseline 6 and Post 6).

In the other Days (2nd to 5th) patients will only receive the intervention and won't be evaluated.

The therapist performs manual contact (pisiform, ulnar edge and the last three fingers) with the underside of the costal cartilage of the 7th, 8th, 9th and 10th rib, and guiding forearms toward the shoulders of the corresponding side. During inspiration, pulls the points of contact with both hands, in the direction of the head, accompanying the elevation movement of the ribs. During exhalation, deepens contact toward the inner costal, maintaining resistance. 2 sets x 10 breaths (1 min interval). Treatment will last two weeks (6 sessions) All patients will undertake four evaluations throughout treatment: Baseline Day 1 and post Day 1; Baseline Day 6 and post Day 6.

To evaluate diaphragmatic mobility a high-resolution ultrasound SonoaceR3 (Samsung Medison - South Korea) with a 3.5 MHz convex transducer will be used. Volunteers will remain in a supine position and receive verbal command to perform Inspiratory capacity maneuvers (IC), and the measurement of each curve referring to the diaphragmatic displacement (in mm) will be performed immediately after obtaining the images. The maneuvers will be repeated until obtaining 5 satisfactory images. The average of the three highest values not differing by more than 10% between their values should be accepted.

Compartmental Chest wall volume will be measured by Opto-electronic Plethysmograph (OEP) (BTS Bioengineering, Italy) with 89 reflective markers placed on volunteer´s skin surface using a hypoallergenic adhesive on specific anatomical points of the chest wall and abdomen. Thus, changes in chest wall volumes are going to be calculated, allowing to acquire total chest wall volume (Vcw) and the division into three compartments, namely: pulmonary rib cage (Rc,p), abdominal rib cage (Rc,a) and abdomen (Ab) during quiet breathing, inspiratory capacity (IC) and vital capacity (VC), maneuvers.

Six-minute walking tests (6MWT) will be performed in accordance to the ATS/ERS criteria, in the moments: Pre 1st session and Pre 6th session.