You need to be lying on a bed inclined around 30-45º. Place the entire sole of your feet on the bed. Bend your knees around 90º. Place your hands on the bed.
Slowly breathe in through your nose and raise your hands at the same time. Breathe out through your mouth and lower your arms back to the bed. During the exercise, try to breathe filling the abdomen.TIPS:: You shouldn't feel pain during the exercise. If you feel fatigue, stop and rest.