Im a helthy man of 24. aftr exercse of 30min (regardles mor or eve) i feel drowsy (not tired) &end up bein unproductve throghout d day. reason/solutn?

Excess fatigue?: Your symptoms of excessive fatigue or tiredness could simply be triggered by physical exertion. There may be many reasons for such a condition....one of them being the amount of exercise you are actually doing. However, to be sure something else such as a thyroid, adrenal, or other condition is not responsible you should be seen by a doctor. They may wish to draw blood and urine samples.