I'm a 20 year old male with a slender build. I recently started running, which is the first high impact aerobic exercise I've done in awhile. I'm just doing one lap around my block which is just shy of a half a mile. The first time i did it, I felt extremely nauseated, and my calf muscles and my feet were throbbing in pain. Two days later I ran the lap again almost 10 seconds faster only this time, I didn't feel particularly nauseated and my legs felt fine, but my feet were throbbing painfully. It was excruciating. It felt like someone was putting my feet in vice grips. This lasted for about 20 minutes before subsiding. What could be the problem? Would it go away with more conditioning or is it something else?
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