Most Replayed Moment: Alzheimer's Starts 20 Years Before Symptoms! How To Protect Your Brain Now

0:04What's the most compelling study you've ever encountered that proves that exercise is central to Alzheimer's prevention and brain health? When we look at all of the data, we can see that the biggest amount of return on investment is from resistance training.

0:19Resistance training being? Strength training. One of the most compelling studies was probably the SMART trial where they took a group of people with mild cognitive impairment and gave them two to three times per week of resistance training. And they not only preserved their cognitive functions, they enhanced their processing speed, they enhanced their fluid intelligence, and they had slowing of the gray matter.

0:44The grey matter. Yeah. So your brain consists of both grey and white matter. So grey matter are the cell bodies that lives on the outer side, outer portions of your brain. And the white matter is deep within the brain, and that's where all of our myelinated neurons live. And over time we see that we can have little lesions in the white matter of the brain. So a lot of the times people will ask me, Stephen, I'm scared. My mother had Alzheimer's disease. I'm scared I'm going to get it.