Develop a workout routine that you can stick to. Heidi's personal trainer, David Kirsch, developed a routine that she can follow wherever she is without needing more than dumbbells.
Work out at least four days a week doing a combination of aerobic exercises and strength training. She performs exercises such as shadowboxing, lunges, crunches, squats and jumping jacks at 1-minute intervals for at least 45 minutes.
Eat small meals at least five times a day to keep your metabolism at an optimal level. It's reported Heidi followed the 3-hour diet after baby #2 and was amazingly on the runaway after only 7 weeks.
Follow "The Ultimate New Your Diet" which recommends foods packed with complex carbohydrates, such as lentils, and protein-rich foods. These foods make you feel full longer and provide needed energy. Avoid dairy, fruit, bread, starchy carbohydrates and alcohol.
Grab a snack if you are hungry but choose wisely. Heidi eats an apple when she needs a snack. Apples are low in calories and make you feel full.