A Maine fitness instructor is mixing exercise with history to offer unique workouts in Portland.Leigh Rush Olson is well qualified to offer her historic workouts. I was a student of history at Brooklyn College in New York City,” Olson said. “I took a Portland history class at the Maine Historical Society sponsored by Portland Landmarks, and that s how I really got my foundation. Olson, who is a full-time certified fitness instructor, combines a two-hour workout with a narrative tour of Portland’s past.“Each stop is about a minute, although when I talk about the history of prohibition, that takes a little bit longer, so I’ll do a lot of squats during that time period, and I have a clicker and I keep track of how many squats and lunges we do during the entire tour,” Olson said.Participants said they love adding a little history to their workout.“It s outdoors. It s so much fun. You learn all about Portland, the great places to go, the history, it s amazing,” parti