at about 45 u00b0 and includes a bore 20 that communicates with the interior 22 of the main body 12 in the preferred embodiment the mouthpiece 16 is sufficiently flexible to be stretched over flange 18 to change the angle of the mouthpiece from 45 u00b0 to generally in line with the main body 12 the opposite end 24 of the main body 12 is open for receipt of the inner cylinder 14 the inner cylinder 14 has a closed end 27 and an open end 28 with the open end 28 being inserted into main body 12 a knob 30 extends from the end 27 so that the inner cylinder 14 can be manually rotated or reciprocated within the main body 12 in the preferred embodiment the main body is 3 567 34 long which includes the mouthpiece 16 and the inner cylinder is 3 67 34 if the knob 30 is included the main body and inner cylinder are made of polycarbonate or other moldable plastic such as polyethylene the breathing apparatus 10 is adapted for exercising a users lungs through inspiration and expiration against resistance pulsing and percussion the apparatus 10 has two sets of openings that can be aligned to provide resistance pulsing.