Did Arnold Schwarzenegger Take Steroids? What He Admitted and the Era’s Drugs

Yes. Arnold Schwarzenegger has said openly that he used anabolic steroids during his bodybuilding career. He competed in the 1960s and 1970s, when steroids were prescription drugs, professional bodybuilding had no drug testing, and use was common among top competitors. He has also said he has no regrets about it.

What he has never published is a list of the drugs and doses he used. That matters, because the internet is full of “Arnold cycles” with exact weekly doses. None of them come from Arnold, his doctors or any record from the time. They are reconstructions.

This article sets out what he has actually said, his competitive timeline, which drugs were available to bodybuilders of his era, why the so-called “Oak cycle” does not hold up, and what his later heart surgeries do and do not tell us.

Did Arnold Schwarzenegger Take Steroids?

The short answer is yes, and it is not a matter of speculation. Unlike most athletes discussed in “natty or not” debates, Arnold has acknowledged his steroid use himself, more than once and over several decades.

In the mid-2000s, while he was governor of California, he told an interviewer he had no regrets about using steroids. He explained that they were new at the time and that he and his peers had taken them under a doctor’s supervision.

A common account, repeated across bodybuilding media, is that he used them mainly in the run-up to contests, to hold on to muscle while dieting hard. That fits how many bodybuilders of the era described their own use, but it is second-hand. No interview, book or medical record gives his exact drugs, doses or cycle lengths.

In later years he has also spoken critically about drug use in modern professional bodybuilding and the health risks competitors now take.

Arnold Schwarzenegger at a Glance

Arnold’s Bodybuilding Career Timeline

Early Years in Austria

Arnold was born in Thal, a village near Graz, in 1947. His father, Gustav, was the local police chief. Arnold played several sports as a boy before taking up weight training as a teenager, and he quickly showed an unusual response to it.

During his compulsory service in the Austrian army, he left base without permission to compete in the Junior Mr. Europe contest. He won, and was punished with time in military prison when he returned. The story became part of his legend: even then, competing came first.

Mr. Universe and the Move to America

Arnold placed second at the NABBA Mr. Universe in London in 1966. He won the amateur title the following year at 20, and is often described as the youngest winner of the title at the time. He went on to collect five Mr. Universe titles across the NABBA and IFBB.

In 1968 he moved to the United States with backing from publisher Joe Weider. His first big American contest, the 1968 IFBB Mr. Universe in Miami, ended in defeat to the smaller but sharper Frank Zane. He settled in California and trained at Gold’s Gym in Venice, then the center of the sport.

The Mr. Olympia Years

Arnold’s first Mr. Olympia, in 1969, ended in second place behind Sergio Oliva. He beat Oliva the following year and won six titles in a row from 1970 to 1975. The 1975 contest in Pretoria, South Africa, was filmed for the documentary Pumping Iron, released in 1977, which made him famous far beyond the gym.

He then retired to focus on acting, but returned for the 1980 Mr. Olympia in Sydney after a short preparation and won his seventh title. That win is still debated. Many in the sport felt he was not in his best condition and that other competitors deserved to win. For every champion before and after him, see our list of Mr. Olympia winners.

Hollywood and Politics

His first film, Hercules in New York (1970), credited him as “Arnold Strong”, and his voice was dubbed. Stay Hungry (1976) earned him a Golden Globe for New Star of the Year, and Pumping Iron followed. Conan the Barbarian (1982) and The Terminator (1984) made him one of the biggest action stars in the world.

He served as governor of California from 2003 to 2011, then returned to acting, including playing the T-800 again in Terminator Genisys and Terminator: Dark Fate. He has kept training into later life, despite several heart operations, which are covered below.

Were Steroids Legal When Arnold Competed?

A common claim is that steroids were “as legal as protein powder” in Arnold’s day. That is not quite right. They were prescription medicines, made by pharmaceutical companies and meant to be obtained through a doctor. They were never over-the-counter supplements.

In the United States, anabolic steroids only became federally controlled substances with the Anabolic Steroid Control Act of 1990, which placed them in Schedule III. Before that, they were regulated like other prescription drugs. Arnold has said he took them under a doctor’s supervision, which fits how the drugs were supplied in his early years.

Sport was different too. The International Olympic Committee added anabolic steroids to its banned list in 1975, but professional bodybuilding did not follow Olympic rules, and there was no drug testing at the Mr. Olympia in Arnold’s era. Using steroids broke no contest rule.

Legal did not mean safe or well understood. The long-term effects on the heart, liver and hormones that are documented now were far less clear in the 1960s and 1970s.

The Steroids of the Golden Era

Bodybuilders of Arnold’s generation had a much shorter list of drugs than lifters do now. The main options were pharmaceutical products from established drug companies. Dianabol, launched in the US by Ciba in 1958, was the first steroid to become widely used by strength athletes.

Which of these did Arnold use? The names most often linked to him are Dianabol and Deca-Durabolin, sometimes with Primobolan or testosterone. Those names come from second-hand accounts and from what was available at the time, not from a list he has published. Treat any claim about his exact stack as an educated guess.

Two things set that era apart from modern bodybuilding. First, these were pharmaceutical products, not underground-lab oils of uncertain content and strength. Second, insulin and growth hormone, which are central to modern professional bodybuilding, only became common in the sport later.

The “Oak Cycle”: Why It Doesn’t Hold Up

Search for Arnold’s steroid cycle and you will find a 25-week plan, split into five-week blocks, with exact weekly doses of Primobolan, Dianabol and Deca-Durabolin. It is often called the “Oak cycle”, and it has been repeated so often that it reads like fact. It isn’t. Even the old version of this page, which published it, admitted the cycle was not proven.

There are four problems with it:

• No source: It does not come from Arnold, a training partner, a doctor or any document from the time.
• Too neat to be a record: Five-week blocks with a dose range for each drug is how modern cycle templates are written. Nobody has produced anything from the 1970s that looks like it.
• Built on a guess: It assumes a specific three-drug stack, and that stack is itself second-hand.
• Not a guide: Even if it were accurate, what a champion did with pharmaceutical drugs under medical supervision decades ago says nothing about what is safe for anyone now.

What can be said is more general. Bodybuilders of that era who have spoken about it usually describe fewer compounds and lower doses than are common in modern professional bodybuilding. Those are recollections, not measured data, but they are consistent with each other and with the limited range of drugs available at the time.

How Much of Arnold’s Physique Was Steroids?

No one can separate the drugs from the man. What research can do is show how large the drug effect is, and what the drugs cannot do on their own.

What the Research Shows

The best-known controlled trial is a 1996 study by Bhasin and colleagues in the New England Journal of Medicine. Healthy young men received 600mg of testosterone enanthate a week or a placebo for 10 weeks, with or without strength training. The men who trained while taking testosterone gained the most muscle and strength. The men who took testosterone without training still gained more fat-free mass than the men who trained on placebo.

That is a large effect, and it is the reason steroids and elite bodybuilding have been tied together for more than 60 years. But the biggest gains came when the drug was combined with hard training. Steroids add to training and genetics; they do not replace them.

Genetics and Training

Plenty of bodybuilders in the 1970s had access to the same drugs and never came close to Arnold. His frame, his muscle shape and his famous chest and biceps were his own. His training volume was also extreme: he is known for double-split training, working out twice a day, six days a week.

He also worked relentlessly on weak points. His calves lagged early in his career, and the story of him cutting the legs off his training trousers so he could not hide them has become one of the best-known in the sport.

The FFMI Estimate

Fat-free mass index (FFMI) gives a rough sense of where a physique sits. In a 1995 study by Kouri, Pope and colleagues, drug-free lifters topped out at an FFMI of about 25. Using Arnold’s commonly listed contest stats (6’2″ and around 235 lb) and an assumed 6-10% body fat, his FFMI comes out at roughly 27-28.

The figure is only as good as the inputs, and his height and contest weight vary between sources. But every reasonable version lands above 25. So both things are true: steroids helped Arnold build and hold a physique beyond the usual natural range, and his genetics and work ethic explain why he stood out among competitors who used the same drugs. Our guide to steroids vs natural bodybuilders covers the other signs people look for.

Arnold’s Heart Surgeries: Is There a Link to Steroids?

Arnold’s heart history comes up in almost every discussion of his steroid use, so it is worth being precise about what has been reported.

The original problem was congenital: he was born with it, so steroids did not cause it. The 2018 operation, reported at the time by The Independent, was part of the same long story of valve repairs. Whether years of heavy training and steroid use affected how his heart aged cannot be known from the outside.

What is known is that long-term steroid use harms the heart in general. A 2017 study in Circulation by Baggish and colleagues compared long-term steroid users with similar weightlifters who did not use them. The users had weaker pumping function and more plaque in their coronary arteries, and plaque was greater with higher lifetime doses. Those findings are about steroid users as a group, not about Arnold.

What Arnold’s Story Means for Lifters Now

Arnold’s use is often held up as proof that steroids are harmless or simply part of the sport. The context has changed in ways that matter:

• Legal status: In the US, anabolic steroids are Schedule III controlled substances, and they are banned in all drug-tested sport.
• Product quality: Most steroids used for bodybuilding now come from unregulated sources, where the label may not match what is in the vial.
• Doses and stacks: Modern professional bodybuilding typically involves more compounds and longer use than golden-era athletes describe.
• Health evidence: There is now solid human data on heart damage, hormone suppression and dependence in long-term users, which did not exist in the 1970s.

The lasting part of Arnold’s legacy is the work: the training volume, the hours of posing practice and the attention to weak points. That part does not need a prescription.