Personal Trainer: Walking is a fitness simulation game for the Nintendo DS, centered on promoting physical activity through walking. The game belongs to the genre of health and wellness and utilizes the DS's unique features to track players' steps with included pedometers. Players sync their steps to the game, which then visualizes their daily activity, sets goals, and monitors progress. With customizable avatars and collaborative challenges, it encourages regular walking with a blend of gaming and real-world exercise, aiming to make fitness a fun and integral part of one's daily routine.