Do these things:
1) I suggest taking a week or two really really easy and then easing back into it. You can cycle but the stairmaster is a little bit more iffy. If it doesn't bother you go ahead and do it. Otherwise only do enough so that it continues to feel better as the weeks go on. My freshman year of track I got ptt and had it on and off for about 3 months. It was so ridiculously annoying, so annoying that I quit running and only played soccer my sophomore year. Don't do what I did.
2) You state that you had come off a anterior tendon issue. I assume you are talking about the tendon at the front of your ankle. If that is true then that means your ankles must be doing a lot of the work while running. I suggest you work really hard on doing exercises for the glutes and hips to strengthen them. Here is a good website
http://www.t-nation.com/free_online_article/sports_body_training_performance/dispelling_the_glute_myth
.
3) Since you still have inflammation I don't know if you should do strengthening exercises for the tendon or not. I am unsure if it had helped me during the tendonitis stage. Remember this is a tendon that is used while standing, walking or any other weight bearing activity. Rest is important to a degree. But I do know once is hit the tendonosis stage, eccentirc work is what got me back. So if the pain is still there, but the inflammation is gone then eccentric load on the tendon will help it. An example being this...http://www.sportsinjurybulletin.com/archive/tibialis-tendinitis.html
4) You can try self massage for the calves. Many ptt survivors swear by it but it didn't do a lot for me.
5) One last thing. When you fully recover (and you will), try to open up the ankles with some joint mobility work. Many focus on the tendons and calves but the joint is often ignored. The sedentary lifestyle doesn't make it easy to get into positions to practice deep ankle flexion therefore we lose the ability to go into a deep squat. I am not saying that its necessary to go into a deep squat but getting a decent amount of flexibility in the ankle is desirable.
Be aggressive and quick with this injury, two or three bad moves and you could be struggling with it for longer than you should. Good luck and tell us if we helped.