Learn how to strengthen the ball and socket joint of the hip to feel stronger and more comfortable walking, squatting, climbing stairs, or just moving about your day-to-day life.

The Johnny Joint is a ball-and-socket joint, but instead of steel, the ball is encased in a urethane socket. The Johnny Joint is a Currie Enterprises innovation and is named after John Currie.

The shoulder is the most mobile joint in the body. It’s a ‘ball and socket’ joint, however sockets aren’t deep enough so the joint is supported by tendons and muscles. Occasionally the ...