Lifting weights makes your brain look younger.
One year of either heavy- or moderate-intensity strength training reduced older adults' estimated brain age by 1.4-2.3 years on average and enhanced functional connectivity between brain networks.
What I find remarkable is, while the training lasted only one year, the effects on the brain were still noticeable at the two-year follow up.
So many benefits of going to the gym, and not just for your muscles.