Hi. I have just finished week 4 run 3. In run 1 when I heard Laura saying I had run for a total of 16 minutes I was smiling to myself as I remembered how I had struggled with my breathing in week 1and was feeling pleased with myself. The first two runs of week 4 went better than the last one tonight because my ankles felt really stiff - not like I had injured them, they just felt less flexible. Is that common? Strangely, I only struggle with my breathing when I think about it and when Laura talks about it!