When Jonathan Majors stepped into the ring as Damian “Dame” Anderson in Creed III and debuted as Kang the Conqueror in the MCU, fans and fitness enthusiasts alike were stunned. Packing on over 20 pounds of sheer muscle while maintaining razor-thin body fat, his physical transformation was nothing short of superhuman. But in an era where Hollywood transformations are highly scrutinized, the rapid muscle gain immediately sparked the age-old question: Is Jonathan Majors on steroids, or is his superhero physique the result of elite genetics and grueling workouts? In this breakdown, we analyze his training regimen, 6,000-calorie diet, and the fitness community’s verdict.
Who is Jonathan Majors? The Rise of a New Hollywood Physique
From Lovecraft Country to Creed III
Jonathan Majors first gained critical acclaim for his role in Lovecraft Country, where he showcased an athletic, lean physique. However, it wasn’t until he was cast in the grueling boxing drama Creed III alongside Michael B. Jordan that his body began to make headlines. To play a hardened, prison-trained boxer, Majors needed to look not just fit, but intimidatingly massive and powerful.
The Role of Kang the Conqueror
Simultaneously, Majors was preparing to become the next major villain of the Marvel Cinematic Universe: Kang the Conqueror. The role demanded a larger-than-life physical presence to believably threaten the Avengers. Between these two highly physical roles, Majors underwent a dramatic body recomposition, significantly increasing his muscle mass while keeping his body fat incredibly low.
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Breaking Down the Jonathan Majors Workout Regimen
The 18-Month Training Timeline
According to his trainers, Majors spent roughly 18 months transforming his body. This is a critical detail, as it provides a longer, more realistic window for natural muscle growth compared to the standard 12-week Hollywood transformations that almost certainly rely on performance-enhancing drugs.
Training Three Times a Day
His routine was famously described as punishing. Majors reportedly engaged in three-a-day workouts, focusing heavily on resistance training, cardiovascular conditioning, and specialized boxing drills. While this level of volume is impressive, it is also highly demanding on the central nervous system, leading many fitness experts to question how he recovered without chemical assistance.
Mark ‘Rhino’ Smith’s Bodybuilding Approach
Majors worked closely with trainer Mark “Rhino” Smith, utilizing a classic bodybuilding approach. They prioritized heavy compound movements and high-volume hypertrophy work to build the “Greek god” aesthetic, focusing intensely on his back, shoulders, and core.
The 6,000-Calorie Diet: Fueling a Superhero Body
High Protein and Clean Carbs
To support his massive energy expenditure and build muscle, Majors reportedly consumed an astonishing 6,000 calories a day. According to studies on the effect of energy surplus on body composition, eating in a large surplus is necessary to pack on significant muscle mass. His diet was strictly controlled, consisting of massive amounts of lean protein, clean carbohydrates, and healthy fats.
Maintaining Low Body Fat While Bulking
The controversy surrounding his diet lies in his body fat percentage. Generally, when consuming 6,000 calories naturally, an athlete will gain a significant amount of fat alongside the muscle. Majors, however, appeared to stay under 10% body fat throughout the bulking process, a feat that is exceedingly rare for natural bodybuilders.
Is Jonathan Majors on Steroids? The ‘Natty or Not’ Debate
Analyzing His 21-Pound Muscle Gain
Majors gained a reported 21 pounds of pure muscle for these roles. While a novice lifter might achieve this in their first year naturally (the “newbie gains” phase), achieving this level of hyper-muscularity when you are already in great shape is suspicious. The risks and realities of performance-enhancing drugs make them a tempting shortcut for actors under strict deadlines.
Greg Doucette and the Fitness Community’s Verdict
Prominent fitness YouTubers, including IFBB Pro Greg Doucette, weighed in heavily on the transformation. Doucette concluded that gaining 21 pounds of dry muscle while retaining single-digit body fat is highly suspect, labeling Majors’ transformation as likely chemically assisted.
The Trenbolone Rumors Addressed
During a high-profile domestic dispute trial, text messages surfaced where Majors referred to himself as a “monster,” leading to rampant online speculation that he was suffering from “roid rage,” specifically tied to Trenbolone. While no drug test or admission has ever confirmed these rumors, the fitness community quickly adopted them as proof of his steroid cycle.
Understanding the Fat-Free Mass Index (FFMI) in Bodybuilding
What is the Natural Limit?
The Fat-Free Mass Index (FFMI) is a formula used to measure muscle mass relative to height. According to the landmark FFMI study on users and nonusers of anabolic-androgenic steroids, an FFMI of 25 is widely accepted as the absolute natural limit for male muscle growth.
Where Does Jonathan Majors Stand?
Estimating his height at 6’0″ and his peak weight around 205 pounds at 8% body fat, Majors’ FFMI lands right around the 25.5 to 26 mark. While not as outrageously high as professional open bodybuilders, it sits precariously over the natural limit line, indicating that some level of chemical assistance—perhaps TRT or a mild cycle—was highly probable.
The ‘Hollywood Standard’ and Performance-Enhancing Drugs
Time Constraints for Movie Roles
It is important to view this debate through the lens of the film industry. Actors are given millions of dollars and incredibly short timeframes (often just a few months) to transform their bodies into comic book illustrations. Natural bodybuilding takes years of slow, methodical progression. The effect of testosterone administration on muscle mass allows studios to guarantee these dramatic visual results on schedule.
TRT and Monitored Enhancements in Film
Many Hollywood stars are quietly placed on medically supervised Testosterone Replacement Therapy (TRT) protocols by anti-aging clinics. This is an unspoken industry standard. While we may never have definitive proof of whether Jonathan Majors used steroids, the timeframe, the sheer volume of lean tissue gained, and the industry norms suggest that his incredible Creed III physique was likely built with the help of modern sports medicine.
