Not with this game plan: "Wear a loose, high bun," says Tippi Shorter, hairstylist to Jennifer Hudson and Alicia Keys. After working out, sprinkle in dry shampoo to absorb oil from your scalp, then blow-dry wet pieces. (If you have wavy hair, add a curl activator before drying.) No time for styling? Tie hair in a knot, then slip on a skinny headband to hide hairline frizz.