Hey guys, I have a few questions that I have looked for answers to but haven't had luck. Please bear with me as this might be a long post, but I'll start off with some background. When I was younger I was heavily involved in sports(Started when I was about 5). I was always a very light kid growing up and never had problems with my feet. Though I did have a problem caused by my tonsils that made it hard for me to keep my food down and decreased my appetite. I had my tonsils removed when I was around 8 and I began to bulk up very fast and soon became pretty heavy for my age (I wasn't obese or out of shape I had a stocky build). I began to feel pain in my knees and feet while playing sports later on at around 12 years old. I played both football and lacrosse which required me to wear cleats which offered very little arch support. I didn't have a problem sprinting short distances but when it came to endurance running I was in a lot of pain. The pain had become so intense in my feet and knees that I no longer enjoyed playing and quit all sports. I saw an orthopedist around the time I quit which was right around when I was turning 15 and I was told I had a problem with my knees(the cartilage behind my knee caps had not hardened and there was a tendon I believe that was tearing away and irritating my knee cap) and that if I rested and waited a few years it would go away and I would be fine (he also said that this was the root of the problem with my feet because of how I ran). So now present day, I decided that I want to pursue a career in the military and began working out. Well, the pain in my knees and feet was still there. I found a video posted here about stretches for knee pain and after doing that for a few days my knee pain was completely gone, but my feet were still in pain. Anything past .5 miles of running and I get extreme pain in my arches. It is to the point that I begin to limp. I normally would just go through the pain but it is a debilitating injury and there is no way I would be able to run distances needed to join the military. I went to one podiatrist who told me that I needed arch support and he made custom orthodics for me. I didn't see any results with them and I found them difficult to run in due to the thickness of them which caused most of my heel to be out of my shoe. I went to another podiatrist a few days ago and he seemed to diagnose the problem quickly without asking much about any background and his answer was that I had severe flat feet and said "there are just certain feet that are not meant for running, and yours are one of them". He fitted me for an orthodic that would not raise my arches like the other pair, but instead support my feet the way they are. He also told me that even with them, I will have a hard time doing more than 1 or 2 miles. So given my background, is there anyone else who has a similar issue or know if I will ever be able to run long distances. I am currently 6' 240lbs and 17 years old. I also have flexible flat feet which means that I have a good arch while off the ground, but when I put weight down, my arches collapse. Is it possible that I collapsed my arches from the 10 or so years of sports I played and if so is there a possibility of raising my arches again through weight loss, foot strengthening exercises, and orthotics? Thanks for the help.