"Exercise Snacking" Is Trending, but Is It Effective? I Tried It For 2 Weeks

Lately, my elder millennial body's been feeling extra . . . elderly. My back's achy, my knees make these weird creaky sounds. I could blame my age, but it's not just that: I had a second baby last fall, then signed up for a half marathon this spring, so the only exercise I've made time for recently is running. As helpful as that might be for my cardio fitness, it hasn't done my strength or mobility any fa...