Jump start your fall workout routine with Fuel’s 4 week XTraining challenge!!! Choose 4 classes 4 days a week at your time frame. This challenge will start out with some baseline fitness challenges and along the way we will be tracking your progress!! Cardio, Strength and Core. Interval training and other training methods are used to boost your metabolism throughout the day. Interval training can supercharge your fitness, boost you metabolism, burn off the extra fat and help you start reaching your fitness goals. A Fuel trainer at each class will show you modifications and progressions for each exercise. This offers a much more personalized and effective workout. We will challenge each level of fitness safely and effectively from rookie to veteran exerciser. FUN FUN FUN. Fuel makes your workout fun. If you enjoy and like what you are doing you may work a little bit harder.