Instructor – Jane Linden – You will need a long elastic band, and a pilates ball. The intensity in this class will be felt in your back muscles, all while doing exercises that focus on improving bone density. It’s very important to strengthen your back muscles as your back muscles support the spine upright. Maintaining a good posture will prevent the spine from excessively rounding forwards, which can lead to stress fractures in the spine in those with low bone density.