Sometimes when I’m running a little too hard for a little too long, I’ll feel sick to my stomach. A few times in high school, and a number of times in the Army, I’ve seen people run until they puke. Why exactly does this happen? I know, it’s because out-of-shape people are exercising too hard, but what exactly is going on in the body when this happens? I notice the only time I start to feel sick to my stomach when I run is when I’m starting to breathe really hard–some connection there?
On a related note, what’s up with those stitches people get in their sides when running? I usually only get them in my right side–is that normal?
Thanks in advance.