Aging Muscles Restore Lost Strength.

[SteveL]

Extra Nuclei Help Muscle Cells Regain Past Strength : Shots - Health News : NPR

[Bestafter60]

Huge takeaway:
Schwartz adds, "If we can bank muscle nuclei early in life, when it's easier to build muscle, we could then draw on these later in life to slow the effects of aging." He thinks early physical education classes, which are often on the chopping block when schools tighten budgets, gain added importance in light of this research.
Hoping "it's never to late to start" also applies!

[Mark Rippetoe]

Maybe Schwartz was in a better PE class than I had.