Unzipped: Tinsley Mortimer

The New York City socialite, handbag designer and author unpacks her gym bag.

It's hard to imagine Virginia-born socialite Tinsley Mortimer, with her gloss and polish and manners, sweating up a storm. But her sporty roots run as deep as her Southern ones. She was on the competitive national tennis circuit growing up and played for the Division 1 team at Columbia University. These days the handbag designer has a different cardio of choice to keep herself sample size-ready. "Running works my body the best, so I'll run on the treadmill or along the West Side highway," she says. "I'll also go into an empty classroom at Equinox and jump rope or do sprints, push-ups or some boxing. I think it's good to mix it up," she says, before adding with a laugh, "I mean, this is when I do it." After returning from a whirlwind 15-city book tour for her debut novel Southern Charm, she gave Q a peek inside her gym bag.