This is a very cool case study about how exercise affects the brain and how fast the positive effects can begin to wear off after stopping a regular exercise routine. Give it a read! I have two different links below, choose the appropriate one for you 🙂
Read this one if you are very knowledgeable about reading case studies. Link for full case study.
Read this one if you are like Grant and prefer the “Broad strokes.” Link for article on study