BMUK

I mean who would have a leg day and not squat, right?
It's a scientific fact, it's never too late to commit to movement, and strength, and flexibility, and mobility, and fitness. Your attitude is all that counts.
These movements are the basics before you start getting fancy with anything else and they should never be forgotten.
A simple way to activate your core is to hold yourself up when you exercise—no irony intended.
We know training must be hard to be effective—the bad news is that it has to get harder.
Can some muscles tolerate more frequency than others?