Enlist the kids
Need a fitness buddy? Look no further than your child! Most community YMCAs offer "Mommy and Me" swimming or yoga classes, many big cities have stroller-walking programs, and any yard is big enough for an impromptu obstacle course. "When the swim class I take with my 12-month-old son ends, I hand him to my husband so I can squeeze in 15 minutes' worth of laps," says Lynzi Ziegenhagen, of Baltimore.