Rubber ball for turn exercises for warm-up exercises and for physiotherapy purposes

摘要

A rubber ball designed for physical training, warm-up exercise, and physiotherapy, having an inflatable bladder and a laminated covering covered on the periphery of the bladder, the laminated covering being formed by: adhering a plurality of rubber strips to the bladder and then treating the rubber strips with a vulcanization process, the laminated covering being thicker and harder than the bladder.