First lady Michelle Obama worked out with trainers from "The Biggest Loser" at the White House as part of her national Let's Move! initiative. Take a look at other Presidential first ladies and the causes they have supported.
Nancy Reagan embarked on a campaign against drugs during her years as first lady: "Just Say No." The slogan inspired thousands to start "Just Say No" clubs and marches. Her popularity saw a boost, and student drug and alcohol addiction decreased from one-third to one-fourth in the mid-80s.