The information provided on this site (or publications/products from this site) are for educational purposes only, and does not substitute for professional medical advice. The author is not a physician. Consult a physician prior to starting any exercise program to determine if it is right for your unique needs. This is particularly true if you (or your family) have a history of high blood pressure or heart disease, or if you have ever experienced chest pain when exercising, or chest pain in the past month when not engaged in physical activity, smoke, have high cholesterol, are obese, or have a bone or joint problem that could be made worse by change in physical activity. Do not use any information from the author or from this site if your physician advises against it.