Enhance virtually any exercise routine to improve muscle tone, endurance, and balance.ZoN Ankle/Wrist weights are a great addition for strengthening and muscle toning programs. ZoN Ankle/Wrist weights work not only your upper and lower arms, but your shoulders, chest and back as well. Used as ankle weights, they help develop hip and leg muscles. On ankles or wrists, they provide an easy and time-saving way to boost the benefits of an aerobic workout.