So after what felt like a horrific R2, today's run felt an awful lot better, but I think it might be beneficial to repeat a run (if not 2!) before moving on to week 2. Disappointed in myself (which I know is silly but can't seem to help!), but I'd far rather play safe than push on.
On the plus side, what a difference a bra makes! First run in the sports bra and wow! I didn't think anything would be able to stop the bouncing but it did!