We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Kaitlyn Wells An earlier version of this guide misattributed a source as a For ...

Forget 30, flirty, and thriving—you’re 40 and ready to have the fittest years of your life. Maybe, after years of caring for young children, you’ve mastered the morning school drop-off and have ...