Rev. Taylor, pastor of Philadelphia's Oxford Presbyterian Church, endured arthritis pain in her right knee for nearly 10 years. Eventually, the pain got so bad that she chose to undergo knee replacement. Thanks to a less invasive knee replacement procedure, she was back on her feet after only a couple of months of physical therapy.

Recently, Rev. Taylor has experienced the pain of arthritis in her other knee, and this time she is being proactive. She has already scheduled a knee replacement for her left knee. She's taking care of it before the pain forces her to slow down.

"It's not a matter of if, it's a matter of when," said the busy pastor. "The pain doesn't get any better."