Hip Stretch Sitting at your desk all day can result in tight hips, so stretch by putting one ankle on your opposite knee. The goal is to push your knee away from you so you feel it in your hip and seat. Hold it for 15 to 30 seconds, and switch legs.
This short workout works the lower abs and will leave them burning. And you can do this workout at home, the gym, or a hotel room since it requires no equipment. It's quiet too. The only real noise will be your powerful exhale as you engage your deep abs.