What could be the reason for a sudden onset in knee pain, particularly coming up from a squat or sitting on a motorcycle? ADVERTISEMENT 654 viewsSeptember 16, 2015 0 Marian September 16, 2015 0 Comments This pain started in a 23 year old, otherwise healthy, male just one week ago. Walking, cycling and other activities do not cause pain in his knees. 7 Answers ActiveVotedNewestOldest 0 Harris12 Posted 0 Comments I agree with the others. Without knowing or seeing your client I would guess that by checking his form and also for imbalances might fix the problem. If the pain is persistent then a visit to his MD should be the next step. You are viewing 1 out of 7 answers, click here to view all answers. Register or Login