Arnold Schwarzenegger and Dwayne "The Rock" Johnson are more than super-strong superheroes — they have brain power too.

Schwarzenegger, movie idol and former governor of California, has an IQ of 132, according to CBS News.

Johnson graduated from the University of Miami with a bachelor's degree in criminology and physiology, and is now a major Hollywood producer.

That's no surprise to researchers from Florida Atlantic University and the Novo Nordisk Foundation Center for Basic Metabolic Research, who are offering evidence of just how important skeletal muscle function is for cognitive health.

They even say the key to fighting off Alzheimer's doesn't just reside in the brain. It’s in your muscles too.

During physical exertion, a certain protein (Cathepsin B) is released by the muscles, and it directly impacts memory and cognition.

If you're forgetting to get your 10,000 steps or the equivalent daily and two or three 20-30-minute strength-building sessions a week, I recommend these three ways to make sure you keep your muscles and your mind strong:

1. Enlist an exercise pal and join a team or pay for classes and/or training sessions so you have exercise appointments you have to keep.

2. Mix it up so you don't get bored. Combine walking with swimming, pickleball, Pilates, step and spin classes, yoga, tai chi — whatever you enjoy.

3. Make sure to get good quality sleep (around seven hours nightly) so you have the energy and focus you need to enjoy working out.