A great way to start the weekend. This class combines interval training with strength training using a kettlebell. It is fun and varied with something different every week. Suitable for all levels of fitness with modifications and progressions. What is HIIT Training? When most people think of cardio, they think of long, boring jogs, or endless hours on cardio machines.But there's a method of cardio that takes much less time and is far superior to jogging to help you burn fat. Its called High Intensity Interval Training (HIIT) and will take your body to a new fitness level.