Health & Fitness: How To Get Slim Hips and Catcalls

Aerobic walking is comical, economical and coming on fast

Here she comes at 5 in the morning, following the delivery trucks along Queens Boulevard, her hips rotating, arms pumping and legs jerking straight out in front, looking for all the world like a drunken ostrich on parade. Marian Spatz, a high school administrative secretary from the New York City borough of Queens, is totally unfazed by curious stares, for this is her daily exercise regimen. Not for her the heel-pounding, back-jarring effort of jogging. Instead, she, like many other American fitness enthusiasts, has taken up aerobic walking. If you think mere walking will not keep you in shape, listen to...