If you’re like most women I know in their 60s, 70s, and beyond, you’re not chasing six-pack abs. You want to feel steady on your feet, clear in your mind, and confident as you move through your day.

But median retirement balances often matter more than the average, since averages can be skewed by the very highest balances.

A funny thing happens somewhere around midlife: your closet starts to feel like a time capsule. You’ve got jeans from your “maybe I’ll fit into these again” era, a couple of dresses that looked ...