They brave tightropes, swing upside down on the trapeze and twirl around long chiffon fabric, but these are not circus performers; these are everyday people working out in aerial arts fitness classes—a new exercise trend that combines physical strength, flexibility and mental reasoning in a class environment. With classes titled Aerial Conditioning and Technique and Aerial Fitness, people with normal day jobs are discovering working out doesn’t necessarily mean hopping on a treadmill. The Chronicle takes you to Aloft Loft, 2041 W. Carroll Ave and shows you the world of aerial arts fitness.