Svelte television workout guru Jillian Michaels makes her handheld debut with more than a dozen different exercises in Jillian Michaels Fitness Ultimatum 2010 for the DS. Players follow the lead of Michaels' as she takes them through a pre-determined routine of push-ups, abdominal workouts, running, and other exercises in "Jillian's Training" mode. Those looking to customize their regimen can specify which activities they want to do, and when they want to do them, in "My Training" mode. The "My Diary" feature keeps track of each user's schedule, progress, and Body Mass Index, and gamers can unlock helpful tips about diet, fitness, and wellness.