-Breathlessness during exercise may result from inadequate pre-exercise nutrition, caffeine effects, dehydration, asthma or cardiovascular causes.
-Persistent bloating and uneasiness may be related to dietary factors, but should not automatically be attributed to pineapple juice or an empty stomach.
Next Steps
-Avoid strenuous sports until symptoms resolve and you are evaluated, especially if this is new-onset breathlessness at age 40.
-Consult a physician for examination, oxygen saturation, ECG and further tests as indicated.
Health Tips
-Eat a balanced meal or snack before exercise, hydrate adequately and avoid excessive caffeine.
-Resume exercise gradually only after symptoms have resolved and serious causes have been excluded.
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