Exercise is an important part of a healthy lifestyle, but it's possible to have too much of a good thing. While regular physical activity has been shown to have numerous cognitive benefits, including improved memory and overall brain function, over-exercising can have negative effects on the brain. Studies have linked excessive exercise to cognitive decline and burnout, which can lead to decreased mental performance. It's important to find a balance in order to reap the benefits of exercise without putting your brain at risk. While the relationship between exercise and intelligence is complex, it's clear that moderation is key in order to maintain optimal cognitive health.