If you've injured your AC joint, which connects your collarbone and shoulder blade, proper exercise technique will help prevent further injury as you heal.

If your joints ache after sitting too long or make crackling sounds when you get up, you’re not alone. More than half of ...

By Becca Jordre Ph.D., DPT If your joints ache after sitting too long or make crackling sounds when you get up, you’re not alone.