Grating, cracking or popping sounds can emanate from joints (called crepitus). A study published in the journal Arthritis Care & Research (May 2017) found that people who hear these sounds in their knees may be at increased risk for developing knee osteoarthritis (OA). Osteoarthritis (OA) in the hip and knee are common, affecting about 45 and 25 percent of Americans, respectively. It is well known that obesity is linked to increased risk for developing osteoarthritis (OA) in weight-bearing joints, particularly the knee. But can losing weight prevent this?