The blue rectangle on the left is pre-surgery, post marathon, when I was fit. At my fittest I was running high 17's for HR/speed. The purple box in the middle is when I decided to get a little back into shape pre surgery. You can see how quickly progress is made.
The red circle shows my first tentative post-surgery runs; they were all 1-2 miles and pretty slow (9ish pace).
The last 5 runs I have started to stretch things out a little. I'm up to 4 miles and running around 8 minute pace. The data shows a nice little cluster right around 20.
Looking back over my training log I can see that I can get from >20 to under 18 pretty easily in about 3 months, so I'll just follow a similar plan to that time.
Spoke to my doctor today, and he is encouraged by the progress and lack of pain at the injury site. He was also happy (and a little surprised I think) that I have kept it slow and only gradually increased miles. I have some tightness in the inner thigh muscles, but he wasn't worried about that. He wants another 3 weeks of running first. Although it's only 5 weeks since surgery he was fairly confident that I should make a 100% recovery. I see him again on December 17th.
Plus, had my first rainy run today - it was good to get out in the rain and mud again. It was also my first time running two days in a row since early August. So fingers crossed, it's all looking good.