Richard Gadd, known for his role in 'Baby Reindeer', transformed into a muscular character for the BBC's 'Half Man', gaining 40kg of muscle over 14 months. His trainer, David Jenkins, crafted a rigorous workout plan that involved lifting significant weights daily, even amidst Gadd's demanding filming schedule. Gadd's training included lifting up to 11,000kg per session, with workouts tailored to his energy levels after long days on set. Nutrition played a key role, focusing on protein-heavy meals like tandoori chicken and lamb, rather than strict calorie counting. Jenkins emphasized the importance of consistency, adapting workouts to fit Gadd's needs and ensuring he maintained his physique throughout filming. The series delves into themes of brotherhood and the complexities of male relationships, although it has received mixed reviews, with some critics labeling it poorly executed. Overall, Gadd's dedication to his physical transformation showcases the lengths actors go to embody their roles.