<p>I have this weak feeling in my knees after I run. I can't even walk, for about 10 minutes afterwards.</p>
<p>Does anyone have a clue what this is? I know I should see a doctor, but I'm not an experienced runner so I was hoping it's just a phase you go through which I don't know anything about.</p>
<p>My friend suggested it's early signs of arthritis D:...</p>
<p>i used to get this after my really long runs. it just means your legs are weak right now, it goes away after a while. at least for me it did. do your knees sort of shake a little bit too, like they're a little wobbly?</p>
<p>im pretty sure its just some muscle weakness, seriously. how long and how fast do you run before that happens? i used to have that falling feeling whenever i would run really fast for short distances or just run moderately for really long distances. do your knees actually hurt, or is it just that weak feeling? if they dont actually hurt, then its just that your muscles arent used to it. it happens if you lift weights too. for example, if you benchpress, as soon as you stop, your arms feel really weak afterwards.</p>