Hi, I play badminton regularly since last 3 years. A year ago while playing i slipped and fell down but there was no much damage. But on the same day night while i got up in sleep i felt my right leg numb and movement was locked. forcefully i moved the leg and it became normal. but since then i had felt slight pain in knee when i stress more while playing, so i stopped playing for almost 8 month. i have no issues in normal routine, have started to play since a month but i feel its weaker.