Aerobic exercise has the potential to improve your fitness and your ability to concentrate on and perform mental tasks. It also appears that people who exercise regularly will have less age-related mental performance degradation and lose less brain tissue seen on MRI and PET scans.

We know there are substantial physical benefits in regular exercise. That's a given (well it should be!). Harvard drew a connection between exercise and staying fit with cognitive function - the mental activities by which we acquire and process information that becomes knowledge - "mental performance".