Now that I'm trying to visit the gym everyday I notice how at times just below the ribs I feel a stabbing pain.
Quick search says that these are called side stitches, normally felt at the right but at times also at the left. It says that it's a coping mechanism of the body once your body notices you move more than normal (especially if you've been sedentary for too long).
So how to fix this? The easiest way is to breathe in and out with large gulps of air. I tried it a few times and it does work!
Back to exercising again!