Week 1 Day 4 - Legs – LIIFT 50/50: This calorie-incinerating combo workout starts with heavy lifting and then shifts to high-intensity cardio to help strengthen your legs while burning fat all over. LIIFT4 combines heavy lifting and intense cardio to transform your body in 4 days a week. And with 32 unique, real-time workouts, you’ll never get bored, because you’ll never do the same one twice.