Adidas kettlebell the adidas kettlebell are one of the oldest and most basic types of exercise dating back thousands of years however the adidas design team has used the latest materials and innovative design features to bring them right up to date unlike dumbbells kettlebells are intended to be used at speed the design of a kettlebell means that the bulk of the weight is offset from the handle when you swing or lift the kettlebell the inertia of the swing can make the weight feel 3 4