“Being on gear” means using anabolic steroids or other performance-enhancing drugs, most commonly in the context of bodybuilding and strength training. The term is slang, widely used in gyms, online fitness communities, and social media as a less conspicuous way to discuss steroid use. If someone says they’re “on gear,” “running gear,” or “using gear,” they’re telling you they’re taking synthetic hormones to build muscle, increase strength, or improve their physique beyond what natural training allows.
Why the Word “Gear”
Slang terms for steroids rotate through fitness culture partly to keep conversations discreet and partly out of habit. “Gear” is one of the most enduring, used across the UK, Australia, and North America for decades. You’ll also hear “juice,” “sauce,” or simply “PEDs” (performance-enhancing drugs). In bodybuilding forums, someone described as “natty” is training without steroids, while someone “on gear” is not. The distinction matters in those communities because the two approaches produce very different results on very different timelines.
What Substances “Gear” Covers
The word typically refers to anabolic-androgenic steroids, which are synthetic versions of testosterone. These come in two broad categories: pills you swallow and oils you inject. Common oral compounds include oxymetholone, oxandrolone, methandienone, and stanozolol. Injectable compounds include testosterone cypionate, testosterone enanthate, nandrolone decanoate, and boldenone undecylenate. Most users don’t stick to a single drug. “Stacking,” or combining two or more steroids at the same time, is standard practice in bodybuilding circles.
“Gear” can also loosely include other performance-enhancing substances that get paired with steroids: growth hormone, insulin, and drugs used to manage side effects during or after a cycle. The core meaning, though, is anabolic steroids.
How Steroids Build Muscle
Your body naturally produces testosterone, which binds to receptors inside muscle cells and signals them to increase protein synthesis. That’s how muscles repair and grow after training. Anabolic steroids flood the body with far more of these hormones than it would ever produce on its own, amplifying that signal dramatically. The result is faster recovery, greater muscle growth, and the ability to train harder and more frequently without breaking down.
Certain muscle groups respond more visibly than others. The shoulders and trapezius muscles have a particularly high density of androgen receptors, which is why people on gear often develop disproportionately large, rounded shoulders and thick traps compared to natural lifters. That visual signature is one of the reasons the “natty or not” debate is so common online.
What a “Cycle” Looks Like
People on gear don’t typically use steroids continuously without pause (though some do). The standard approach is called a “cycle,” a defined period of steroid use followed by a break. Cycle lengths vary, but 8 to 16 weeks is common. The general guideline circulated in harm-reduction resources is to take at least as much time off as you spent on.
Within steroid culture, you’ll hear a few other terms. “Blasting” means running a cycle at higher doses to maximize muscle gain. “Cruising” means using a low, maintenance-level dose of testosterone between blasts, rather than coming off completely. Someone who “blasts and cruises” essentially stays on gear year-round, just at varying intensities.
What Happens to Natural Hormone Production
This is one of the most significant consequences of being on gear. When you flood your body with external testosterone, your brain detects the surplus and tells your testes to stop producing their own. This shutdown happens quickly. Research on male contraceptive trials shows that sperm production drops to near-zero within about 3.5 months of starting exogenous testosterone. The hormonal signal that drives natural testosterone production, along with fertility, gets suppressed in a dose- and duration-dependent way.
When someone stops a cycle, their body doesn’t bounce back immediately. This suppressed state is sometimes called steroid-induced hypogonadism. Spontaneous hormonal recovery generally occurs within 6 to 12 months after stopping, but that window can feel brutal: low energy, depressed mood, loss of the muscle gains that motivated the cycle in the first place. This is why many users pursue what’s called post-cycle therapy, or PCT, using drugs that stimulate the brain to restart its own hormonal signaling. Research on recreational bodybuilders found that PCT facilitated earlier hormonal normalization compared to simply waiting it out, with the best recovery of fertility markers seen in those who used a combination approach targeting both hormonal and testicular stimulation.
Health Risks of Being on Gear
Steroid use carries real medical risks that scale with dose, duration, and the specific compounds used.
The cardiovascular system takes the hardest hit. Steroids shift cholesterol profiles in a dangerous direction, lowering protective HDL cholesterol and raising harmful LDL cholesterol. Over time, this accelerates plaque buildup in arteries. Users also face increased risk of blood clots, impaired heart function, and thickening of the heart muscle (left ventricular hypertrophy), which can lead to scarring and structural damage. These aren’t theoretical risks for elderly long-term users. Case reports document serious coronary artery disease in steroid-using bodybuilders in their 30s and 40s.
The liver is another concern, especially with oral steroids. Pills are chemically modified to survive digestion, and that modification forces the liver to work harder to process them. Abnormal liver function tests are a common finding in active users.
Psychiatric effects are well-documented too. Aggression and irritability are the most recognized, and a meta-analysis of randomized controlled trials confirmed a small but measurable increase in self-reported aggression in healthy men given steroids. Beyond aggression, users can experience manic episodes, depressive symptoms, and in some cases psychotic symptoms. The mood swings can strain relationships and decision-making in ways users don’t always anticipate beforehand.
Legal Status
In the United States, anabolic steroids are classified as Schedule III controlled substances under the Anabolic Steroid Control Act of 2004. That puts them in the same legal category as certain prescription painkillers and sedatives. Possessing them without a valid prescription is a federal crime, and trafficking carries enhanced sentencing guidelines. The law specifically added anabolic steroids alongside other controlled substances and directed the U.S. Sentencing Commission to review penalties to reflect the seriousness of steroid-related offenses.
Legal status varies by country. In the UK, steroids are legal to possess for personal use but illegal to supply. In Australia and Canada, they’re controlled substances requiring a prescription. Regardless of location, buying steroids from underground labs or online dealers introduces additional risks, since there’s no quality control over what’s actually in the vial.
How Steroid Use Is Detected
If you’re wondering whether someone on gear can pass a drug test, it depends entirely on the compound. Detection windows vary enormously. Oral stanozolol clears urine in about 10 days. Nandrolone decanoate, on the other hand, produces a metabolite that remains detectable in urine for 12 to 18 months after the last injection, making it one of the longest-lingering steroids in drug testing. Long-acting injectable compounds generally leave a much longer detection trail than short-acting ones, because they release the active hormone slowly from the injection site over weeks.
Hair testing extends the window further, potentially catching use from three or more months prior regardless of the compound. Athletes subject to anti-doping testing and military or law enforcement personnel face meaningful career risk, even from a single short cycle months earlier.