Start exercise today. Younger folks gain strength and speed much easier than old people. Lack of physical capability kills the elderly, so the more strength and stamina you start with and work to maintain, the longer you will be mobile.

Do cardio and strength exercises. Endurance should be at least 80% of your cardio, that means slow. Brisk walks or slow jogs. For strength training focus on big hinge movements like squats. Start out small, body weight exercises, and go from there. Get some time with a trainer to check your form.

Everyone should learn new things as often as they can. Pick up a new hobby or skill, become very proficient at it, incorporate it into your life, repeat. This active mental engagement is the best way to prevent dementia and keep your mind sharp.

I did read the article. I am commenting that I have never encountered strong juxtaposition and sharing why I think it is a poor choice.

I disagree. Without explicit direction on OOO we have to follow the operators in order.

The parentheses go first. 1+2=3

Then we have 6 ÷2 ×3

Without parentheses around (2×3) we can’t do that first. So OOO would be left to right. 9.

In other words, as an engineer with half a PhD, I don’t buy strong juxtaposition. That sounds more like laziness than math.