Dakota Johnson and Jamie Dornan just didn’t walk onto the set and throw off their clothes for the hot naked sex scenes in their “50 Shades of Grey” movies. They trained and dieted with top wellness coach Ramona Braganza. Believe it or not, she kept them camera sharp with a 25-minute workout. “I trained them when they arrived in Vancouver for a total of five months. It was to film both Darker and Freed, so we did both movies back to back,” she explains in a new interview.