I love working out, but my husband doesn't. As we get older, I worry our different lifestyles will impact how we age.

My husband and I have been married for over a decade. Ana Reisdorf I didn't mind my husband's aversion to exercise — until I considered what it could mean as we age. Now that we're in our 40s, I've already noticed differences in our flexibility and agility. I'm trying to reframe movement as a tool for longevity rather than a way to physically transform. When I, a type-A dietitian who loves to work out, married a laid-back man who prefers to unwind with his feet up, our different activity le...