I go to the gym regularly and my routine usually begins with 20 - 30 mins on either the cross trainer or the exercise bike. Then I hit the treadmill. I really like the treadmill and enjoy running but I keep getting stitch. It's pretty much as soon as I step on to the treadmill, it's weird, like a sort of trigger almost. It's always on the right hand side in my ribs. It usually goes after about 15 - 20 mins of walking but I can't run with it. It doesn't happen on any of the other equipment. I drink quite a lot of water before I go on the treadmill, could that be it? I wouldn't have thought so. Should I maybe do the treadmill first? Any thoughts? It's so annoying as is really interfering with my exercise. I could do so much more without it. Will appreciate any tips/advice.