Get Fit With Mel B
51 Achievements
PS3
Fit Crowd
Complete a Fitness Workout
45.8%
How to unlock the Fit Crowd achievement in Get Fit With Mel B - Definitive Guide
There are a number of different workouts and Fitness is one. Just finish one. I did a 30 minute but I got the Advanced Cardio one from a 15 minute so you probably only have to do the short one to get this. Perhaps someone can confirm that.