This article is in regards to an American Council on Exercise (ACE) commissioned study conducted by researchers from the Department of Exercise and Sport Science at the University of Wisconsin-La Crosse. The study examined the possible fitness benefits of exercising with kettlebells. This particular study found that the prescribed kettlebell workouts improved a number of fitness parameters including improvements in aerobic capacity and core strength . Having used kettlebells in the past and currently participating in a kettlebell-centric workout program (http://www.t-nation.com/workouts/10000-swing-kettlebell-workout), I can speak to the fitness benefits of training with kettlebells. Just keep in mind that a kettlebell is a tool and may not be the right tool for a particular goal.