http://www.firheat.com/ Have an active lifestyle. Work out 4 times a week and stretch before doing some exercise. If you want to maintain your weight and get your heart pumping every now and then, do a lot of cardio. http://www.firheat.com/ cardio, active lifestyle, knee strain, health consciousness, overweight, back pain, aerobic exercise, far infrared ray, heat therapy, back pain relief http://sites.google.com/site/paindoctorjimmysmits/