For tendon pain/attachment issues, I don't like to stress the structures by starting off with stretching. I like foam rolling, because you can get that release of muscle without aggravating the attachments. Most fitness supply and running stores carry foam rollers. You can also order them online. Or you can make a PVC one, with yoga mat glued on to pad it.

Here's a webpage with vid of a foam roller lower extremity routine. Lower body foam roller routine | Combat Sports Clinic