I'll admit to being very nervous before the race. For me a 5K hurts a lot. You get that lung burn almost immediately and by the time you hit 3K your legs are screaming. You can see my splits and all the race info below, but I was pleasantly surprised how good I felt the entire time. I didn't go out ridiculously fast and I finished with speed in my legs even allowing me to pass two runners in the final 100m. Kilometre 3 was my only source of difficulty which was the turn around in an out and back course. I figure slowing to flip around on the course likely accounts for at least 5 seconds of the pace dip, but I can't be sure.
The big takeaway is that even under a hard effort I'm yet to experience nausea again post surgery. My body feels great but just somewhat undertrained. The plan is to try progressively longer runs starting Saturday with a 15km test. If all continues to feel well in May I should be back to regular training with purpose. That excites me more than anything.