* Running: Stallone ran up to 5 miles a day, including uphill sprints and interval training.
* Weightlifting: He focused on compound exercises like squats, deadlifts, and bench presses, using heavy weights for low reps.
* Boxing: He trained with various boxing coaches, including Tony Burton who played Duke in the Rocky movies.
* Diet: Stallone followed a strict diet, cutting out most carbohydrates and focusing on protein and vegetables.
It's important to note that Stallone's training regime was very intense and not recommended for everyone. He also had a strong personal motivation to get in shape for the role of Rocky Balboa, which drove him to push his limits.
Although Stallone didn't have a specific single trainer for the movie, he worked with multiple individuals to achieve his goals. He was determined to transform his physique and showcase a powerful, leaner Rocky Balboa.