I sustained a knee injury in mid August that required surgery and haven't done a single thing until today. I had the surgery last month and decided to hop on my indoor bike just to see how things would go. I had my bike set to the lowest gear and I pedaled at a very low cadence and speed for 15 mins. There was no pain, but a little fatigue as expected. Here's the thing. Every single metric on the watch matched in GCM with the exception for my aerobic training effect. The watch is showing that it was 1.8 (I said it was very easy ) but in GCM it shows as 0.7. I synced again with no change. As I said, it's been awhile since I've done anything and I was wondering if there's an issue with either FW5.30 or the latest version of GCM for Android? I did a quick search, but I might have missed it if anyone reported on this topic.