Stay young, improve your mobility and prevent injury with the bestselling fitness guide for core strength training for 50-plus from Dr. Karl Knopf. From swinging a golf club to carrying a bag of groceries, the core is everything. Balance, agility and youthful stature are just a few of the benefits of a toned and powerful midsection. Core Strength for 50+ has everything you need to: - Improve posture - Enhance sports performance - Guarantee low back health - Avoid injury With workouts ranging from basic mat work routines to unstable training with foam rollers and stability balls, Core Strength for 50+ provides more than 75 exercises that build and maintain strong muscles in the abs, obliques, lower back and butt.