Not too much to report here - still coming back. I did my first bit of harder running on Friday with a tempo - the tempo was pretty slow, which is partially because I'm really trying to keep my workouts controlled, and partially because I'm out of shape, both mentally and physically.
I'm still playing with the running metrics on my 920. I'm sure they're of limited value in the end (just like paces and HR), but fun to geek about. Two things I noticed:
1) cadence - I generally have a fairly high cadence - about 190-195. What was interesting is how much that cadence can change based on circumstances. Below, the first picture is my cadence for an easy run on a fairly hilly route where I was also dodging puddles and pedestrians, stopping at lights, etc. Next is my cadence for the 2x3200 on Thursday. The difference between the two (variable on left, very steady on right) is exactly what you'd expect to see, but still interesting. (you can click on each picture to enlarge it).
2) ground contact time. On Saturday, an easy run turned into a hard run for the last few miles - the change in ground contact time really stands out.