Sega Body Trainer will be marketed as Itami Fitrainer in the US. The FiTrainer is a virtual personal fitness coach that tells you exactly how you should exercise to achieve maximum results.
From the Itami website, Based on your age, personal fitness level and pulse rate, the FiTrainer will guide you through your customized walking, jogging or running workout routine with its programmed narration, rhythmic beat and music. You can also connect your MP3 player to the FiTrainer and exercise with your favorite MP3 music files.
Source: Itami Fitrainer