“Look at the skyline, and don’t tell me that you can’t do it!” yells a barechested man in a superhero cape and tights. “That skyline was built by people like you! Now finish your side planks in 5, 4, 3, 2, 1….” Five sweaty and tired individuals, including myself, fall on their mats and and breath heavily. It’s Saturday morning at Green Fitness Studio in Bushwick, and we all signed up for seven weeks of Liberation, a program that promises to totally transform your body.