Watch Free Online HD Moviesjoy. Join America's toughest trainer, Jillian Michaels, for a six-week program designed to strengthen your core and sculpt lean, defined abdominal muscles. Featuring two progressive 30-minute workouts, 6 Week Six-Pack combines high-intensity cardio intervals with targeted core exercises to maximize calorie burn while building strength. Begin with Level 1 for the first three weeks before advancing to the more challenging Level 2, with each workout including a warm-up and cooldown for a complete training experience.