As I point out, your biological ability to have children doesn't diminish. So I don't see why you can't have your 2 or 3 children. There are of course options like surrogates, and other more cutting edge tech enabled options.
And as for energy, the point is to commit to your fitness so that you'll be a very healthy and energetic 50 year old :)
And as for energy, the point is to commit to your fitness so that you'll be a very healthy and energetic 50 year old :)