S1, E4: HIIT it hard with Julia to get the fat burning, muscle sculpting results you've always wanted. Work up a sweat and burn a ton of calories in a short amount of time, while sculpting your entire body. Julia lives up to her reputation as the combo queen. This workout can become difficult mentally as you try to figure out new, complex exercises, but hang in there! It's worth every drop of sweat you put in. For best results, use a pair of weights between 5-8lb. Above all, listen to your body on the day of exercise.