12. Brad Pitt: Fight Club
Source: munfitnessblog
To get the sick abs and pecs needed for the movie Fight Club, Brad Pitt endured a 5-day workout routine and a strict diet so as to make sure that he reduced his body fat to 5%. This paid off, big time. The jacked actor was very focused on developing a single set of muscles every day, so as to give each muscle adequate time for rest and recovery while maintaining consistent routines.