1. The exercise “high” primes you to connect with others
Although typically described as a runner’s high, an exercise-induced mood boost is not exclusive to running. A similar bliss can be found in any sustained physical activity.
Scientists have long speculated that endorphins are behind the high, but research shows the high is linked to another class of brain chemicals: endocannabinoids (the same chemicals mimicked by cannabis)—what neuroscientists describe as “don’t worry, be happy” chemicals.
2. Exercise can make your brain more sensitive to joy
When you exercise, you provide a low-dose jolt to the brain’s reward centers—the system of the brain that helps you anticipate pleasure, feel motivated, and maintain hope. Over time, regular exercise remodels the reward system, leading to higher circulating levels of dopamine and more available dopamine receptors. In this way, exercise can both relieve depression and expand your capacity for joy.
These changes can also repair the neurological havoc wreaked by substance abuse. Substance abuse lowers the level of dopamine in your brain and reduces the availability of dopamine receptors in the reward system. As result, people struggling with addiction can feel unmotivated, depressed, antisocial, and unable to enjoy ordinary pleasures. Exercise can reverse this.
