By Diane Carman The average American is fat, sedentary, drinks too many sweetened soft drinks, eats too many French fries and knows it all too well. Most people in the U.S. want to lose weight, said Elizabeth Kealey, a registered dietician and professional research assistant at the Anschutz Health and Wellness Center. The problem is they just dont know how. Researchers at the center are testing strategies and documenting results, and while they dont claim to have the obesity cure at their fingertips, they have identified several approaches that appear to work for a significant population that wants to lose…