25 year old male with a small tear to my MCL on my right knee (at 21 years old). I've done a couple of half marathons since then. I wear a knee sleeve which compresses it and it does help a little. I'm also flat footed but wear an appropriate flat foot shoe.
I'll admit my fitness isn't up to half marathon standards yet however I've noticed a recurring theme during my long distance runs. For all my 21k runs, a small twinge in my knee will start at around 11 - 13km and with that fear, I will always stop running because I know it's my knee telling me it's not doing so well. I'm not exactly dead tired at this point either and it's frustrating because I know fitness-wise, I can do better if not limited by the knee.
So my first question, are there any more supportive knee sleeves/braces for MCL weakness? Second and much more open ended, any advise in general for my situation?