The Izzo Balance Disks strengthen hips, torso, back, legs knees and ankles.  The Izzo Balance Disks will help your golf swing by improving balance, strength, core stability, and blood circulation. The disks make you pay close attention to where your weight is at address and how it moves through the swing. Since the disks are unstable, you have to use the small muscles in your legs, back and stomach to stay balanced. It's a great workout, and when you get back on the grass it makes you feel well grounded and solid over your feet.