We've all heard of a woman’s LBD (Little Black Dress) but I can’t help notice women continually wearing their favorite black workout pants to the gym. Can black sweatpants make you look thinner too?

NEW YORK — So long, dingy sweatpants. Workout clothes for women, once relegated to the back of the closet, are moving to the front of the fashion scene. Yoga pants are the new jeans, neon sports bras ...