your exercise ability? I have a hip disease. Bilateral Hip Displasia. Had it since I was born, but didn't find out about it till I was about 8 years old. And I have had three hip surgery's on my right hip that ended in getting a total hip replacement because the other two surgery's failed. But "Bilateral" means both side's. So I have extreme pain in my left hip now, and can not walk or basically any kind of exercise. I'm 17 and planning the hopefully last surgery on my left hip for February 2011 after my 18th birthday. But I weigh 260 pounds, I'm 5 foot 8 Inch's tall, pretty big boned but I NEED to loss at least 50 pounds quickly, and I would like to see what some other people think. Soo please e-mail or post on here.