Jason Momoa has discussed both gaining and losing weight for roles, noting that he sometimes needs to gain size—such as
Jason Momoa’s weight changes are tied to his film roles, age, and evolving training philosophy. While naturally large at 6'4" and around 240 pounds, he has alternated between bulking, cutting, and maintaining depending on the demands of each project.
Key Points on His Weight Gain
Early Career & Game of Thrones
Momoa admitted he used high-calorie foods like pizza to gain size for Khal Drogo.
This was part of an early “clean bulk” approach to build mass quickly.
Superhero Roles (Justice League, Aquaman)
For these roles, he often had to lose weight and lean out rather than bulk up.
He trained heavily under Mark Twight, focusing on strength and physique-specific conditioning.
At 46, Momoa says gaining or cutting weight is harder and less appealing.
He avoids extreme bulking now, citing age, injuries, and lifestyle changes.
Supergirl (2026) – Lobo
For Lobo, he did not gain weight; instead, the massive upper body was created with prosthetics.
He stated there was “no way” he could or would want to get that big physically.
Diet Factors Affecting Weight
Momoa’s diet swings between clean eating (black rice, sardines, eggs) and indulgent meals (biscuits and gravy, buttered spaghetti with caviar).
He maintains room for his nightly “three Guinness” by keeping daytime meals clean.
Men's Health Magazine Australia
As he ages, he has reduced red meat, alcohol, and rich foods to manage weight more easily.
Formerly relied on heavy lifting for mass.
Now prefers functional training, kettlebells, and injury‑preventive methods.
This shift reduces the likelihood of major bulking phases.
Jason Momoa’s weight gain history reflects role demands and personal evolution. While he once bulked aggressively, he now avoids extreme size changes and relies on training, diet moderation, and—when needed—prosthetics to achieve character physiques.
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