Why do i feel dizzy after working out?

Ah, this is a common feeling. Often, it is due to dehydration or a sudden drop in blood pressure. When you stop exercising abruptly, blood can pool in your legs for a moment, away from your brain. Overexertion or not breathing properly can also be the cause. Try cooling down slowly with some gentle stretching. Also, make sure you are drinking enough water throughout the day, not just during your workout. This should help a great deal.