I find if I eat something, especially fruit before exercising I get them but sometimes still get them when exercising in a fasted state.
You can either take a break for a bit from exercising and stop and massage the area but a lot of times I find it returns quickly again when you start back up. I find a good abdominal stretch helps with a 5-10 minute break.
ETA: I just realized you said "upper chest". Runner's stitches occur below the ribcage. Sorry, I jumped the gun there.
I am trying to increase my running intervals during my fitness walk. I am up to only 1/4 mile. Today, after I slowed down, I had a very sharp and quick pain in my upper chest. By the time I grabbed my chest it was gone and I was fine to walk the rest of the way. I really don't feel this was heart related, but does anyone know what it might be?
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