From Our Editors
"20.2." That's how many calories participants of a Warrior Room session can expect to burn during each minute of their kettlebell workout. That's because the workout equipment, which consists of weighted cast-iron spheres with handles on the tops, is incorporated during an array of exercises including squats, throws, and bicep curls. Combined together, these strength-training and cardio exercises produce sessions that build lean muscle, boost metabolism, and burn calories almost as effectively as setting cheesecake on fire. Sessions are also kept to small group sizes, ensuring students individual attention and a safe environment.