People who exercise three times a week earn 6 to 10 per cent more than people who don’t.
That’s not from a fitness blog. It’s from a peer-reviewed study of over 12,000 people, published in the Journal of Labor Research, using propensity score matching to control for the obvious objection that disciplined people probably do both. The earnings effect held up. Even exercising a few times a month showed a positive bump.
Meanwhile, here in Australia, things are heading the other direction. ANU’s 2025 Election Monitoring Survey found that life satisfaction has dropped to its lowest point since COVID lockdowns. For the first time in their tracking data, more Australians believe their children’s lives will be worse than their own. Professor Nicholas Biddle at ANU called it “the erosion of hope.” Diagnosed anxiety and depression have nearly doubled since 2009, from 11 to 19 per cent of the population.
So we have strong evidence that exercise is associated with earning more and feeling better, at a time when Australians are earning less in real terms and feeling worse. And yet the average business owner’s response to a rough week is to skip the gym, not prioritise it.
I get it. I run a small business, I have a newborn, and I teach 6am spin classes twice a week. The alarm goes off at 5:15 and there is no part of me that wants to be awake. But I’ve come to think of that hour as the highest-return investment I make all day, and the neuroscience backs that up in ways worth understanding properly.
What your brain actually does when you exercise
You’ve probably seen the social media version: “exercise releases the four happy hormones.” That’s not wrong exactly, but it’s a bumper sticker on a textbook. Here’s what’s actually happening.
When you exercise, your brain increases production of serotonin and dopamine, the two neurotransmitters most directly involved in mood regulation, motivation, and emotional resilience. A 2025 review in Frontiers in Psychology confirmed that exercise regulates both, enhancing mood stability and inducing positive structural changes in the brain, including improved neuroplasticity in the hippocampus.
Endorphins get the most press. They’re your body’s natural painkillers, and they’re part of why a hard session can leave you feeling euphoric. Though it’s worth noting the American Psychological Association has flagged that the popular “endorphin rush” theory is more complicated than we thought, and that norepinephrine, a stress-response modulator, may deserve more credit than it currently gets.
The newest addition to the picture is oxytocin. A 2025 study published in PNAS showed that exercise activates a specific oxytocin circuit in the brain linked to antidepressant effects, and a 2024 human trial found that running significantly increased oxytocin levels in 97.5 per cent of participants.
For a business owner running on caffeine and cortisol, here’s the practical translation: that hour at the gym isn’t time off. It’s the machine’s maintenance that makes every other decision you’ll make that day.
Knowing this doesn’t solve the problem
If knowledge were enough, every business owner with a gym membership would use it. The barrier isn’t information. It’s activation energy.
You’re tired. You’re behind on invoices. You slept badly because your brain decided 2am was a good time to revisit that conversation with your accountant. The last thing you want to do is put on shoes and drive somewhere to make yourself uncomfortable on purpose.
I see this every week. The people who show up to my 6am classes consistently aren’t more disciplined than everyone else. They’ve just reduced the friction. They laid out their gear the night before. They committed to a friend. They stopped treating exercise as something they’d do “if there’s time” and started treating it as a fixed appointment, like a client meeting they can’t reschedule.
A few evidence-based strategies that help with the activation problem specifically:
Exercise timing matters. Research on circadian rhythm suggests that morning exercise, particularly before 10am, produces stronger mood benefits for the rest of the day. For business owners, this also means the cognitive boost hits during your highest-stakes hours, not after them.
You need less time than you think. A 2024 meta-analysis in Scientific Reports found that a single HIIT session produced acute improvements in executive function and information processing. Twenty minutes of high-intensity work can deliver more mood and cognitive benefits than an hour of moderate cardio. For a time-poor founder, that matters.
What you take before training can lower the barrier. This isn’t about pre-workout stimulants. Two amino acids with genuine evidence behind them: L-Theanine, where a 2019 systematic review of nine randomised controlled trials found that 200 to 400 milligrams per day reduced stress and anxiety under stressful conditions, and L-Tyrosine, which a 2015 meta-analysis found buffers cognitive performance specifically under acute stress like sleep deprivation and high-pressure environments. Both are available over the counter and neither is a stimulant. They work by quietly lowering the internal resistance that makes the gym feel impossible on a hard morning.
The compound effect on your business
The earnings data is compelling on its own, but the second-order effects are where it gets interesting for business owners specifically.
Better sleep. Sharper decision-making in the afternoon instead of the usual fog. Fewer reactive emails sent at 4pm when your willpower tank is empty. A baseline mood that makes difficult conversations feel manageable instead of catastrophic.
There’s also a discipline transfer that’s hard to quantify but easy to recognise. The same part of you that got out of bed at 5:15am to do something hard is the part that picks up the phone to chase an overdue invoice, or has the uncomfortable conversation with an underperforming team member, or makes the decision you’ve been putting off for two weeks.
One thing I didn’t expect when I started showing up to early morning gym sessions: the two groups you consistently find there are people who could be on the cover of a fitness magazine and c-suite executives in their fifties who drove in from the suburbs. Visually, they could not be more different. But talk to either group and they’ll tell you the same thing: they keep coming back because they know what happens when they stop. The good feelings go away. The drive fades. The afternoon slump comes back. The hard conversations feel hard again.
They’re not there because they’re wired differently. They’re there because they’ve learned what the hour buys them, and they can’t afford to give it up. Look around any gym at 6am and you’ll find people who are successful and people who are about to be. Not because exercise is some secret genetic advantage, but because it’s a learned habit that compounds over time, the same way good financial decisions do.
That’s the most reassuring part of all this for slackers like me. It’s not in your DNA. It’s a behaviour you can start tomorrow morning, and the returns show up faster than you’d expect.
