Fitness and Creativity: Why Your Fitness Level Matters
Fitness and creativity research has one finding worth knowing before you schedule a workout around a brainstorm: the same workout can help one person's thinking and hurt another's, depending on how fit they are. A separate line of research links everyday activity levels to creative output. Both bodies of evidence are small, and most of it is correlational. Still, they explain why advice like "go for a run before you brainstorm" sharpens some people and leaves others foggy.
Same Workout, Different Results
In 2013, Lorenza Colzato, Bernhard Hommel and colleagues published a study in Frontiers in Human Neuroscience that split 96 young adults by fitness. Forty-eight were athletes, defined as people who had exercised at least three times a week for at least two years. The other 48 exercised less than once a week. Each participant sat at rest or rode a stationary bike at moderate or intense effort, and did two creativity tasks during or after the session: the Remote Associates Test, which measures convergent thinking, and an Alternate Uses task, which measures divergent thinking.
Convergent thinking split by fitness. Non-athletes solved fewer Remote Associates items after intense exercise than at rest (3.6 versus 4.6 out of 10). Athletes went the other way and scored a little higher with exercise (about 4.1 versus 3.5 at rest), though that gain fell short of statistical significance.
Divergent thinking didn't split. Intense exercise lowered flexibility, the number of different categories people's ideas fell into, for athletes and non-athletes alike (6.7 versus 7.4 at rest).
Colzato's team explained the pattern with "ego depletion," the idea that exercise uses up a limited supply of cognitive control and that fit people spend less of it on the workout. Treat that explanation with care. Ego depletion has had a rough decade: a 2016 replication effort across 23 labs and 2,141 participants found an effect close to zero. A simpler reading fits the data just as well. The same bike resistance is easy for an athlete and hard for someone who rarely exercises, and hard physical effort competes with focused thinking for attention.
How This Fits With Studies That Found a Boost
Our post on exercise and creativity covered a 2021 study by Aga and colleagues, where about 15 minutes of mostly light cycling improved flexibility on the Alternate Uses Test. Colzato found that intense cycling lowered it. The two results conflict less than they seem to. The Aga workout was mostly light and tested people after the session, while Colzato's hardest condition was hard by design.
A 2019 systematic review in Europe's Journal of Psychology by Emily Frith, Paul Loprinzi and colleagues found the same shape across the field. Twelve of the 13 studies they reviewed reported some benefit of exercise for creative thinking, but the reviewers rated 77 percent of them at moderate to high risk of bias. Their conclusion was weak to modest support for acute, moderate-intensity exercise.
Taken together, moderate effort may help a little, hard effort can cost you, and your fitness sets the point where "hard" begins.
Active People Report More Creative Activity
A second line of research skips the lab workout and looks at daily life. In a 2020 study in Scientific Reports, Christian Rominger and colleagues at the University of Graz had 79 university students wear accelerometers for five days, then gave them an Alternate Uses task and a figural task from the Torrance Tests. Students who moved more during the week scored higher on the creativity tasks (r = 0.32), for both fluency and originality. Positive mood didn't explain the link.
A follow-up from the same group, published in 2024 with 156 participants wearing chest sensors, found that people who sat less and did more moderate-to-vigorous activity reported more creative activities in daily life, such as cooking original dishes and making music. That correlation was small (r = 0.17).
Neither study can tell you which way the arrow points. Movement may help creative thinking, creative people may move more, or something else, like having more free time, could drive both.
Why Fitness Changes the Cost of a Workout
Fitness changes how much of your capacity a given effort takes. A 20-minute ride at a fixed resistance is a warm-up for a trained cyclist and a hard session for someone who hasn't exercised in a year. The first person finishes with attention to spare. The second finishes tired and scattered, and the Colzato results suggest that focused problem-solving pays for it.
That also means the right advice for you changes as you get fitter. A workout that fogged your thinking six months ago may leave you sharper now.
If you want a rough benchmark, time yourself over a mile and compare the result with average mile time by age for your sex. If you finish well under the average, a hard workout likely costs you less than it costs most people.
How to Time Exercise Around Creative Work
Match the effort to your fitness. If you rarely exercise, keep movement before a brainstorm easy: a walk or a ride at a pace where you can still hold a conversation. The walking and creativity research supports that kind of light movement.
Keep intense intervals away from idea generation. Intense exercise cut flexibility for athletes and non-athletes alike in the Colzato study. Do the hard session after the brainstorm.
Start the idea work after the workout ends. Most of the studies that found a benefit tested people after exercise, once they had stopped moving.
Measure flexibility on yourself. Run the Category Switches drill on a rest day and again after a workout, and compare how many different categories your ideas cover. Flexibility is the measure that moved in both the Colzato and Aga studies, so it's the number to watch.
Build fitness for the long run. The everyday-activity studies are correlational, but they point the same way as the athlete study. Being active more often is unlikely to hurt your creative work, and it makes each individual workout cheaper.
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