i am about to turn 54 (ugh! I said it out loud) and have already lost 85 lbs but have 50 more to go. A close friend has recommended this several times, she uses it religiously and has lost almost 30 lbs, but she has been doing it for several years off and on. I will admit to being terrified. Open to suggestions. Have really bad hips and want to avoid injury. Thank you in advance.