Kick-start weight loss at home with the help of trainer Bob Harper and “fan favorite” contestants Tara Costa and Sione Fa from NBC’s “The Biggest Loser.” Walking is one of the easiest and most effective ways to burn calories. Now get moving with four one-mile indoor walks that increase in intensity. Start with Walk 1, a low-impact walking workout, and progress to Walk 4 with added weight and cardio power. Plus, get your chance to achieve your marathon goal like the contestants on the show. Use the progress tracker and your one-mile walking workouts will add up to 26 miles in just three weeks. Start this low-impact fitness program and cross the finish line as a leaner, healthier you!