hi i am a teenager and i swim frequently. since a month ago, i have started to jog and run on the treadmill once per week. however, a day after my run, my knees seem to swell and enlarge, only to return to normal after around 3 days. when i bend down when my knees are swollen, it hurts a lot. is the swelling caused by lactic acid built up in the knees? i always make it a point to do full body stretching before and after my run, so i do not understand why my knees swell. what is happening? also, what can i do to reduce or prevent or make the swelling less severe? please help. thanks.Reply Follow This Thread Stop Following This Thread Flag this Discussion
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