My vasti laterali (outside muscles of the quadriceps group) were still sore from Saturday's rides, but I decided to ride in Irving anyway. Inner calf muscles took a workout. Don't know which one, but it's new and unique. I don't think it's the medial gastrocnemius branch, but it could be. This was also my first ride with cleats. I did a a full ride with the SPDs. This worked out well. Probably going to reduce my toe-in a little more, but it was pretty close. I did a lot of clip and unclip action during initial setup. It was important to be able to get out easily, and get in fairly easily. The M530s have enough platform to pedal unclipped, which I did a couple of times. 5 of us split off and took the monster hill, and it seemed better up until 3/4, after which it still sucked. Not sure if it's the cleats, or more riding, or the cool temps. Initial review shows my Watts are up 10% and my HR down 20% while picking up several personal records for Strava segments. Also, much better at keeping left foot forward when idle, but still had 2 over-spec alerts. Anyway, very happy that I didn't fall over. It helped a lot to be in a group, and I stayed 3/4 back until late in the ride. http://app.strava.com/activities/84502906 http://www.mapmyride.com/workout/391881381 http://runkeeper.com/user/xaminmo/activity/246625790