Celebrity trainer Harley Pasternak is known for whipping famous bodies (like Katy Perry, Jessica Simpson, and Rihanna) into shape, fast. And while the trainer is a spokesperson for gym equipment manufacturer Cybex, we asked him to share a workout that anyone can do, even if they don't have a gym membership (or personal gym!). Get the five-move workout, perfect for almost any small space, below. Repeat two to three times for an effective workout in under 30 minutes.