Not Giving Up: The Science Behind Why Testosterone Keeps You in the Fight

You’re losing. You know you’re losing. The other guy is beating you in every single round, and it’s getting worse. Each round costs you real money. The rational move is to walk away, pocket what you have left, and save yourself the pain. Some men do exactly that. Others stay in the fight, round after round, bleeding through their stake against an opponent they can’t beat. What separates the two groups? A 2021 study from the University of Vienna answered that question with pharmacological precision: testosterone (1).

The Study That Proved Testosterone Keeps You Fighting

Hana Kutlikova and her research team at the University of Vienna designed a particularly cruel experiment. They recruited 88 healthy men, aged 18 to 40, gave half of them a single 150-milligram dose of testosterone gel (Androgel) and the other half a placebo. Neither the researchers nor the participants knew who got what. Two hours later, after the testosterone had reached peak blood levels confirmed by liquid chromatography-tandem mass spectrometry (testosterone group: 6.25 ng/mL versus placebo group: 0.104 ng/mL), the men entered a rigged competition (1).

Here’s how the rig worked. Each round, the participant and his “opponent” (actually a computer) each tried to illuminate a light bulb on screen by pressing one of two buttons. The participant’s success rate was locked at 50%, regardless of which button he pressed. The opponent started at 50% too, but its success rate climbed steadily to 80% over the first 30 rounds and stayed there for the rest of the competition. The opponent got stronger and stronger while the participant stayed the same. Every round cost a non-refundable two-cent entry fee, and participants could bet up to five cents per round on top of that. They could quit whenever they wanted, keep whatever money remained, and play a non-competitive version of the task until the session ended (1). The design was elegant in its brutality: keep playing and you bleed money against an opponent who is objectively better than you. Quit and you walk away with something. The only measure that mattered was how long each man stayed in.

Men Who Felt Out of Control Quit Fast. Unless They Had Testosterone.

Before the competition, the researchers ran a separate manipulation designed to shift each man’s sense of personal control. Half the participants in each drug group went through a task rigged to make them feel in control of the outcome (light bulb success ramped up to 75% by the end), while the other half got a version engineered to strip that feeling away (success dropped to just 25%). None of it was real. The success rates were predetermined. But the psychological effect was powerful: men in the high-control condition reported feeling about 72% in control. Men in the low-control condition reported roughly 11% (1). The manipulation landed exactly where the researchers intended.

In the placebo group, that gap in perceived control determined everything. Men who entered the competition feeling in control stuck around. Men who entered feeling helpless bailed twice as early. This tracks with decades of motivation research from Ryan and Deci, Bandura and Locke, and others: when you believe your actions don’t matter, you stop trying. Psychologists call it learned helplessness, and it’s one of the most replicated findings in behavioral science (1).

In the testosterone group, though, the gap disappeared. Men who felt out of control persisted just as long as men who felt in full command. Testosterone made low-control men act as if they’d entered the competition with high confidence, staying in round after round against an opponent they couldn’t beat. The numbers tell the story: low-control men on placebo lasted an average of about 29 rounds. Low-control men on testosterone lasted 56, nearly double (z = 2.305, p = .021). And testosterone didn’t change persistence in men who already felt in control. It rescued only the men who had every psychological reason to quit (1).

They Knew They Were Losing. They Stayed Anyway.

This is the finding that separates the study from a simple “testosterone makes you reckless” narrative. Every 20 rounds, participants rated how much control they believed they had over their own light bulb and how much control the opponent had. In the placebo group, those ratings didn’t shift much over the course of the competition. In the testosterone group, men became more aware of the opponent’s advantage as the rounds wore on. By the time they eventually quit, testosterone-treated men rated the opponent’s control significantly higher than their own (opponent: 48.7% versus self: 31.4%, p < .001) and higher than they’d rated it at the start of the competition (p = .044) (1).

The testosterone didn’t make them delusional. It didn’t numb them to the reality that they were losing. They could see, with increasing clarity, that the opponent was outperforming them, and they kept competing anyway. This mirrors a 2019 finding by Geniole and colleagues, published in Proceedings of the Royal Society B, where testosterone reduced submissive resource-ceding to high-threat competitors without reducing participants’ sensitivity to the threat itself (2). The hormone doesn’t shut off your ability to read the room. It changes what you do with that information. You see the odds against you, you register the disadvantage, and you fight anyway.

The Mechanism: Competing Is the Point

Why would a hormone push you to keep fighting a battle you’re losing? The researchers’ explanation draws on status theory. In competitive environments, persistence itself broadcasts status. Walking away signals submission. From an evolutionary standpoint, the man who fights even when outmatched communicates something valuable to the group: I don’t back down. That signal carries social weight that extends well beyond the immediate outcome of any single contest (1, 3).

Previous research supports this reading. A 2020 study by Losecaat Vermeer and colleagues at the same university showed that exogenous testosterone increased status-seeking motivation specifically in men with unstable low social status (4). Separate work by Casto and colleagues found that higher testosterone levels during competition correlated with greater satisfaction with personal performance even after a loss (5). The hormone doesn’t need you to win. It needs you to compete. And when your sense of control is low, when the psychological deck is stacked against you, that’s precisely when testosterone exerts its strongest push to stay in the arena. The study’s authors put it directly: testosterone appears to modify behavioral responses to information about an opponent’s superiority, rather than changing the explicit assessment of that superiority (1).

This connects to what we’ve covered about testosterone’s role in authentic behavior under social pressure. A 2023 pharmacological study by the same Kutlikova research group found that testosterone eliminated fake prosocial behavior men perform for an audience. The through-line across both studies is consistent: testosterone doesn’t make men aggressive or stupid. It makes them act on their own internal assessment rather than deferring to external signals, whether those signals come from an audience’s expectations, a social hierarchy, or a rigged competition designed to grind you down.

What Happens When Testosterone Drops and You Don’t Know Why You’re Quitting

Testosterone in men declines at roughly 1-2% per year starting in the early thirties. By 50, many men are running at 60-70% of their peak levels. The standard symptom list is familiar: lower energy, reduced sex drive, loss of muscle mass, mood changes. But the Kutlikova data points to a consequence that doesn’t appear on most intake questionnaires: a shrinking capacity for competitive persistence, a growing tendency to fold when conditions aren’t favorable.

Think about the man at 45 who used to push through setbacks at work and now finds himself pulling back when projects hit resistance. The man who used to argue his position and now defers to keep things smooth. The man who launched a business in his thirties on nothing but confidence and now hesitates to take risks despite having more money and more experience than he did a decade ago. We like to explain these shifts as wisdom. Maturity. Picking your battles. The pharmacological evidence says that part of what’s happening is biochemical. When testosterone drops, the specific mechanism that keeps you persisting through feelings of helplessness weakens. The men in this study who got placebo and felt out of control quit fast. That’s the default state when the hormone isn’t there to override the impulse to walk away.

We’ve covered how low testosterone increases the risk of Alzheimer’s disease and how visceral fat accumulation creates a feedback loop that drives testosterone further down through aromatase conversion. The persistence finding adds another layer to that decline. It’s not only your body deteriorating. It’s your willingness to stay in fights that matter, quietly eroding from the inside out.

What The Study Didn’t Show, and Why That Matters Too

The researchers checked whether baseline cortisol levels, CAG repeat polymorphism of the androgen receptor gene (a genetic marker of how sensitive androgen receptors are to testosterone), or trait dominance modulated the persistence effect. None of them did. This is somewhat surprising because prior studies found that testosterone’s effects on status-seeking behavior are stronger in men with low cortisol and high dominance (6, 7). The authors suggest that the current psychological state, in this case induced perceived control, may override those trait-level factors entirely. In practical terms: your genetic profile and personality type appear to matter less than your mental state going into a competitive situation. Testosterone’s protective effect on persistence operated regardless of individual differences in receptor sensitivity, stress hormones, or dominant temperament (1).

One finding that deserves attention: betting behavior was completely unaffected by testosterone or control manipulation. Men adjusted their bets based on the previous round’s outcome (lower after a loss, higher after a win), but the hormone had zero influence on how much they wagered (1). Testosterone didn’t make them reckless gamblers. It affected only the decision to stay or quit, the binary choice of whether to keep competing or to walk away. That selectivity matters because it argues against the crude “testosterone makes you take stupid risks” narrative that refuses to die. The risk profile per round didn’t change. The decision to keep showing up did. These men weren’t betting bigger or playing dumber. They were choosing, with full awareness of the odds, not to give up.

The study has real limitations. Only men were included because testosterone metabolism differs between sexes and the pharmacokinetics of topical testosterone in women weren’t established at the time. The sample was relatively small (88 participants, 81 after exclusions) and drawn from young Western European university students. Whether the same dynamics play out in older men, in men with clinically low testosterone, or across different cultural backgrounds remains open. The effect sizes were large enough to be meaningful (low-control men on testosterone persisted roughly twice as long as their placebo counterparts), but replication in broader populations is needed before these findings directly inform clinical decisions about TRT and motivation.

The 12-Year Parallel

There’s a connection to the CARDIA data we covered in Lose Your Edge, Risk Your Heart. That 40-year study showed physical activity starts declining 12 years before a cardiovascular event, with most men not even realizing it’s happening. The persistence data from Vienna suggests an analogous process for competitive and psychological engagement. The willingness to persist through adversity, to stay in the fight when conditions get hard, may track alongside the decline in testosterone long before anyone frames it as a symptom. The man who used to push through now pulls back. The man who used to compete now avoids the arena entirely. And like the slow physical decline that precedes heart disease, this psychological retreat often gets misattributed to priorities shifting or the natural wisdom of age.

The Vienna study gives that retreat a biochemical name: low perceived control in the absence of testosterone. And it demonstrated, in a controlled, double-blind experiment, that a single dose of the hormone was enough to reverse it.

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References

Kutlikova HH, Geniole SN, Eisenegger C, Lamm C, Jocham G, Studer B. Not giving up: Testosterone promotes persistence against a stronger opponent. Psychoneuroendocrinology. 2021;128:105214. doi:10.1016/j.psyneuen.2021.105214
Geniole SN, Proietti V, Bird BM, Ortiz TL, Bonin PL, Goldfarb B, Watson NV, Carré JM. Testosterone reduces the threat premium in competitive resource division. Proceedings of the Royal Society B. 2019;286(1905):20190720. doi:10.1098/rspb.2019.0720
Mazur A, Booth A. Testosterone and dominance in men. Behavioral and Brain Sciences. 1998;21(3):353-363. doi:10.1017/S0140525X98001228
Losecaat Vermeer AB, Krol I, Gausterer C, Wagner B, Eisenegger C, Lamm C. Exogenous testosterone increases status-seeking motivation in men with unstable low social status. Psychoneuroendocrinology. 2020;113:104552. doi:10.1016/j.psyneuen.2019.104552
Casto KV, Rivell A, Edwards DA. Competition-related testosterone, cortisol, and perceived personal success in recreational women athletes. Hormones and Behavior. 2017;92:29-36. doi:10.1016/j.yhbeh.2017.05.006
Mehta PH, Prasad S. The dual-hormone hypothesis: a brief review and future research agenda. Current Opinion in Behavioral Sciences. 2015;3:163-168. doi:10.1016/j.cobeha.2015.04.008
Mehta PH, van Son V, Welker KM, Prasad S, Sanfey AG, Smidts A, Roelofs K. Exogenous testosterone in women enhances and inhibits competitive decision-making depending on victory-defeat experience and trait dominance. Psychoneuroendocrinology. 2015;60:224-236. doi:10.1016/j.psyneuen.2015.07.004