[FONT=arial, sans-serif]Cracking sounds occur when bubbles form in joints as they are pulled apart. Cavitation within the joint—small cavities of partial vacuum form in the synovial fluid and then rapidly collapse, producing a sharp sound.[/FONT]
[FONT=arial, sans-serif]It's completely normal and nothing you need to worry about. Your joints cracking has nothing to do with the health of your joints or anything like that.[/FONT]