The BackTRAX is not a medical device and should not be used as a substitute for professional medical care. Always consult your physician before attempting any type of exercise or conditioning especially if you have existing health issues. If you are pregnant, have had back or neck surgery, or have any type of pins, rods or fusions in your back or neck you should not use the BackTRAX. Follow instructions thoroughly. Stop immediately and consult your physician if you feel pain or dizziness. ALL CLAIMS AND STATEMENTS ARE BASED UPON USE BY REAL PEOPLE, THEIR RESULTS, ENDORSEMENTS and TESTIMONIALS.