The subject 2. However, tidal volume is said

The results indicate that the
hypotheses made were able to be validated by the data collected in this
experiment. In the static lung volume tests, variables such as inspiratory and
expiratory reserve volumes and vital capacity all decreased during obstructed
breathing compared to normal breathing in both subjects 1 and 2, as to be
expected. This is due to the reduction of airflow because of airway swelling
and compression, which alters and limits the flow of air into and out of the
lungs (3). Tidal volume appeared to decrease in obstructed breathing
when compared to normal breathing in subject 1, and increased during obstructed
breathing for subject 2. However, tidal volume is said to not change drastically
in the case of an obstructive lung disease since tidal volume refers to the air
that is inhaled or exhaled during normal shallow breathing, not during maximal
effort breathing, therefore having a less noticeable change (3).  Moreover, forced vital capacity, a dynamic
lung test, decreased in both subjects during obstructed breathing when compared
to normal breathing, which again was to be expected due to increased challenge
to expire entirely. Studies show that in patients who demonstrate an
obstructive pulmonary disease, they generate a smaller flow of air upon expiration
after trying to take a maximum exhalation (5). The time it takes for
expiration to occur while breathing with an obstruction is inadequate to empty
lung volume due to decreased flow, therefore when an obstruction in breathing
is placed, not the entire amount of air will be exhaled out during an
expiration that lasts roughly 5 seconds in a dynamic lung test (5). Additionally,
the dynamic lung variable FEF25-75 is expected to decrease as a result of airway
obstruction, which was seem in both subjects 1 and 2 when compared to normal
breathing (4). Lastly, results indicate that maximum voluntary
ventilation was seen to decrease during obstructed breathing testing when
looked at next to normal breathing testing. Frequency of breathing as well as
volume is expected to decrease due to the added challenge of breathing with an
obstruction, which results in a decreased flow rate (3). If flow is
decreased, volume of air that is inhaled per minute will inevitably be
decreased as well (3). This demonstrates that normal and expected
results were seen in static testing, forced vital capacity and maximum
voluntary ventilation testing.