Notes
Started out easy. Ran for about 2.5 miles and decided to test my hamstring -- I need to figure out if it's injured or just super tight. So I threw in a few fast pickups:
852m in 3:23 (6:24/mi) comfortably hard
624m in 2:29 (5:58/mi) somewhat uncomfortably hard
164m in 0:35 (5:51/mi) strider
Good news is that my hamstring isn't any worse. Maybe just a tiny bit better. It still needs a lot of flexibility and strength work, but maybe it won't strain or pull unless I flat out sprint. Still need to proceed with caution, but I don't think I need to take any time off.