I feel tired and sleepy all day after workout. I dont know why. Suppose I feel energetic?

Unclear. One possible reason is If you have not slept well or ate enough before and after your workout (especially if it was a vigorous one). Otherwise, you also may want to have your primary care physician do a basic physical with standard lab panels (CBC, Chem panel, thyroid, etc.) if you have not had a physical in a while.