Why do I usually cough after jogging or running or after participating in sports?

The presence of a persistent cough is always abnormal.
There are many reasons why cough may develop. Each
one of us has experienced a cough at some point in our
lives, when ill with a respiratory infection or a head
cold, for example. Most coughs due to the common cold
are short lived and tend to resolve within a month’s time.
When a cough lasts longer than 3–6 weeks or assumes
a particular repetitive pattern, take note. Lung specialists
define a chronic cough as a cough that has been
present for more than 8 weeks. The majority of individuals
with chronic cough who are not cigarette smokers
have one of three causes for their cough: asthma, stomach
reflux (GERD), or postnasal drip syndrome (recently
renamed UACS for upper airway cough syndrome).
Cough that regularly occurs with or following aerobic
exercise strongly suggests the presence of asthma unless
proven otherwise.
Exercise is considered a symptom trigger in all persons
with asthma. Exercise does not cause asthma but acts as
a stimulus to bronchoconstriction in asthma and leads
to increased airway inflammation. In young children in
particular, cough with exertion should never be
ignored; it may be the tip-off to the diagnosis of asthma
since cough is the most frequent symptom of asthma in
children.
Answering the question of why you might be coughing
after running or jogging would require an evaluation
that should begin with a medical history (including any
medication you are taking), discussion of cigarette smoking
if applicable, reviewing the chronology of the symptom,
and a physical examination with close attention to
the sinuses, throat, heart, and lungs. Additional testing
might include a chest X-ray (depending on your
individual medical history) and pulmonary function
testing.