We use this book for older adults who need to start and build strength safely without risk of injury. Many people have significant core and spinal weakness, which often produces chronic joint pain and difficulty getting active without causing injury. The ball series starts with sitting on the ball to safely build core and back stability. It progresses to exercises that slowly challenge people at their own pace and includes a variety of exercises for a full-body workout. The secret is to “challenge but not overwhelm.” Initially, simple exercises help develop the little muscles that control how the spine should move and reteach proper joint movement between the arms, back, pelvis, and legs. For long-term improvement, you need to teach the brain to listen to the receptors in the back and lower extremity joints and strengthen the stabilizer muscles. Mastering the exercise will improve your functional abilities and avoid future injuries. Those with chronic back pain and limited ability to bend and hinge benefit from starting on the ball. Soon, improvement will be seen in daily activities, recreational activities, and hobbies.