Balance between skill level and challenge also means that aging paddlers can be in flow even as they scale back on degree of difficulty. Of course, we're all aging; some of us are just a bit farther along than others.
An article that talks about what is actually happening in the brain during flow describes a theory that resonates with my experience on the river. Entitled "Your Brain in the Zone," the article describes a Drexel University study supporting the idea that "flow can be achieved by training people to release control when they have built up enough expertise in a particular domain." In other words, when you're skilled enough, "try letting go." The article has a great quote about letting go from saxophonist Charlie Parker: "You’ve got to learn your instrument. Then, you practice, practice, practice. And then, when you finally get up there on the bandstand, forget all that and just wail."
It's only fair to acknowledge that in addition to the matter of risk, a possible downside is the effect of too much flow-seeking on relationships and family. As I wrote in my review of Pope Barrow's memoir (Cruiser, May-June 2025), he admits that his dedication to (obsession with?) extreme kayaking helped wreck not one but two marriages.
The benefits of flow can be obtained, though, without going to extremes. And the benefits are not just in the moment. Experts write about a range of carryover effects. For example, the article on the positive psychology website says that flow "is linked to high performance, wellbeing, and positive development. By studying and applying the principles, it is possible to enhance productivity, creativity, and overall life satisfaction." Csikszentmihalyi called flow "the secret to happiness."
I'll second that emotion. A day like I just had on Hopeville gives me hope. Knowing that days like that are possible keeps me going on a lot of days when (see above) politics, relationship problems, work concerns, financial worries, or climate disasters seem overwhelming.
For more information
Mihaly Csikszentmihalyi, "Flow, the secret to happiness," Ted talk video (2004)
"Mihaly Csíkszentmihalyi: The Father of Flow," by Jeremy Sutton (March 31, 2025)
"Your Brain in the Zone: A New Neuroimaging Study Reveals How the Brain Achieves a Creative Flow State," DrexelNews (March 4, 2024)
"What a Flow State Is and how to achieve it," Medical News Today, April 19, 2022
"Achieving a Flow State: 7 ways to get in the zone," by Allaya Cooks-Campbell, March 7, 2022
"Mihaly Csikszentmihalyi, the Father of 'Flow,' Dies at 87," New York Times, Oct. 27, 2021