common knee injuries
torn meniscus: forceful twisting
torn ACL: extreme, planting and changing direction quickly
joint injuries
torn cartilage: caused by aggressive movement
sprains: stabilizing ligaments are stretched or torn
dislocations: bones are forced out of alignment
inflammatory conditions
bursitis: inflammation of bursa
tendonitis: inflammation of tendon
arthritis
inflammation of joints
osteoarthritis (OA)
long term degenerative condition, wear down of cartilage, bone on bone contact can happen
rheumatoid arthritis (RA)
autoimmune disease, immune system attacks normal, healthy joint tissue