Owie I hope your blister heals soon, that sounds sore!!!
I did W1D2 last night too, went much better for me than D1 - I had a problem with stitches on D1 but my breathing was better yesterday so I think that sorted it for me.
Other common causes of stitches (AFAIK) include:
- eating in the hour before you go running (although some would say in the 2-3 hours before you go running)
- weak core muscles
- increasing the intensity of exercise too quickly
Also... Most runners apparantly have a preferred foot which corresponds with exhaling, and if you are inclined to land on your right foot as you exhale you can be more inclined to stitches (to do with the movement of the diaphragm, the ligaments attached to it, and the weight of the liver). You could try exhaling as your left foot hits the ground and see if that makes a difference.
Now, not to sound like your ma or anything
but did you do any cool down exercises afterwards? Even if you feel that you don't need to, it's *so* important to cool down properly after any physical activity, you're leaving yourself open to injury and things like next day muscle soreness if you don't.
(Puts away soap box
Sweetie - good woman, you're flying!