See results in a fraction of the time with short, effective workouts: work smarter not harder! Let's HIIT It! Gina Harney, award-winning creator of Fitnessista.com, knows high-intensity interval training (HIIT) is the smart alternative to long cardio workouts. With shorter workouts you can spend less time working out while building strength, coordination, and endurance and boosting your metabolism so you burn more calories throughout...