Jillian Michaels makes her portable debut as she provides expert exercise advice to help players achieve their fitness goals anytime and anywhere through a personalized fitness program. Players adapt their workout experience to their individual abilities in two different modes: "Jillian's Training" and "My Training." In "Jillian's Training," players follow a pre-defined workout routine proposed by Jillian Michaels, while "My Training" allows players to customize their routines by specifying workout days and activities.

In the game, a 3D avatar of Jillian Michaels demonstrates exercises to ensure that players are maintaining proper form and pace. Players can also track their schedules, progress, and BMI through the innovative "My Diary" feature. With over a dozen real-world exercises and Jillian Michaels' tough love and supervision, Jillian Michaels' Pocket Trainer 2010 helps players develop good habits and provides beneficial advice on Diet, Health, and Wellness!