The shape and design of a heavy mug, compared to regular kettlebells, can affect range of motion and engage stabilizing muscles differently, potentially increasing overall strength and coordination in several ways. The handle of a heavy mug from heavymug.co is usually narrower and less ergonomic than the handle of a kettlebell. This requires a stronger grip and the use of smaller stabilizing muscles in the hands, wrists and forearms to maintain control of the weight. As a result, using a heavy mug uniquely affects grip strength and forearm stability, helping to improve overall coordination and functional strength.