Last night I noticed that, for the first time, my stride was lengthening. I suppose that it's been so long since I did any running that I was concerned, either consciously or not, not to damage my knees. That probably explains my achy glutes. I'm also trying to improve my breathing technique. I tend to gasp, my asthma I suppose, but when I'm walking the dog, always at a brisk pace now, I'm trying to breathe in for 4 paces and exhale for 4. Any other tips for improving either please?