text: i recently started walking and jogging on a treadmill everyday about an hour...? ...and while i am jogging after about 10 minutes i get an ache on the right side of my abdomen blow the end of my rib cage.  why is this happening? is it normal or shoul i worry about it.  it doesn't happen when walking but only when i'm jogging.  please help me...thank you wow!! good for you! you are going to be so much more healthy and buff! this is just a side stitch. it is extremely common and very normal.  try to control your breathing from start to finish.  i had them especially as a young track athlete but less now that my mind is more on preventing exhaustion and conserving energy for endurance through thoughtful breathing. i hope you keep up the work. your body is going to be banging! (that's good... ;-d)