Frequently experience palpitations during exercise

How long does the palpitations experienced during exercise last, and do they often occur with chest tightness? Is there anything I should be cautious about in this situation?

I think palpitations appear within a few minutes of starting exercise. I want to know if this varies depending on the type of exercise.

And I am curious whether these symptoms only appear in people with arrhythmia or if they can also occur in people without arrhythmia.