Why do I feel sleepy after exercising?

Nopenot

New member
It's been 2 days so far that I started running after a long period of inactivity which caused me to become very lazy and a bit overweight. I haven't exercised in over a year and now that I have started again I am feeling sleepy and tired after the run. Why so? I am also eating less than I usually do to keep the pounds off. I'm 17 years old, 5'8 and 200 pounds.
 
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