Celebrity trainer James Duigan works with the likes of Rosie Huntington-Whiteley and Lara Stone. We asked him to share his signature supermodel-approved lunge variation. “The Bodyism Disco Lunge is one a fantastic body weight exercise,” says James. “The Disco Lunge is a great toning exercise and big movements burns lots of calories!” Sounds great to us! Want to give it a try? Here’s how to do it!