For the past month and a half I have had pain/stiffness in the back of my right knee. It doesn’t usually flare up during squats/deadlifts, but from running/walking/standing. How quickly it flairs up depends on intensity, i.e. running it may start to seriously hurt in less than 10 minutes, while walking/standing can take 30-45 minutes.
I have taken two weeks off completely from lower body lifts and a week and a half off from running, but the situation has not improved. It feels like a tendon / soft tissue issue, so I have foam rolled my hamstrings and calves a few times, though not consistently. Any recommendations on treatment? I have read about cross friction massage and also eccentric-only training to improve the knee, but I am unsure how exactly to apply these techniques.
Thank you in advance for any help.