I am 30yr, lean, active woman. I run about 9-16 miles per week and do Crossfit. I was recently diagnosed with patellar tendonitis or Jumper's Knee. I bought this brace hoping it would support my knee, especially since it had piping. Today I ran 3 miles today; the brace moved around and was flimsy. The piping kept the brace on the sides but that's about it. I was really disappointed and would not recommend it.