Any amount of exercise is good for both body and mind, but harder workouts don’t necessarily lead to a sharper mind.
A recent study out of the University of Kansas Alzheimer’s Disease Center found that its senior research participants scored better on both physical endurance and memory tests after 26 weeks of regular brisk walking. But whether participants spent 75 minutes or 225 minutes per week on the treadmill, scores on the memory tests were largely the same. Participants who changed nothing about their lifestyle showed no improvement.
Don’t use that to excuse an easy workout routine, researchers warn, as general physical fitness has many health benefits.