Though exercise has clear mental health benefits, the popular perception that it produces endorphins that raise mood oversimplifies complex interactions between brain chemistry and mental states. The same person could experience the same workout differently from day to day, depending on how they’re feeling, what else is happening in their lives, and the setting where they exercise.
While a subset of people experience an immediate “runner’s high” in response to intense exercise, not everybody has the same experience, which can set others up for disappointment. Brains differ in how sensitive they are to rewards, so some people are primed to get more or less enjoyment out of exercise. Exercise does trigger a release of chemicals that give most people at least some sense of pleasure, but it doesn’t generate enough to drown out a person’s lack of comfort in their body, fear that others are judging them, perfectionism, boredom, physical pain, or exhaustion.
Nationally, only about 30% of people meet federal guidelines for physical activity, and even in famously outdoorsy Colorado, just 35% do. For most of human history, exercise didn’t exist as a separate activity—people moved because they needed to find food or were doing something inherently rewarding like dancing. Now, people need to find a motivation for exercise, which isn’t always readily apparent.
People who believe they’ll accomplish what they’re trying to do report more enjoyment from a workout than those who feel defeated at the start. Having support from people around you also improves the experience, and new exercisers tend to develop more positive feelings as they get better at the activity. A non-exerciser’s best bet is to choose an activity they like or to bundle exercise with something else they enjoy, such as getting outside, spending time with a friend or pet, or listening to music or podcasts. Movement throughout the day can be as good as a dedicated exercise session, whether that means doing physical labor at work or tending a garden.
This article is an AI-assisted summary. All facts and figures are drawn from the original report: https://www.capitalgazette.com/2026/02/18/exercise-mental-health-benefits-endorphins/