I've been weight training for over 30 years, and have done Brazilian Jiu Jitsu for 5 years (I slowed down a bit about 5 years ago). I'm 50 years old, very muscular (weigh 207lbs, I'm 5'6"). Of late, I've had a lot of pain in my left foot. I know I'm flat footed, and I saw a podiatrist that said I have no breaks (x-rayed my foot), and it's all due to the flat feet. I did some research and it seems he was right. Pain gets worse when I sit or lay down, but when I stand / walk around, I'm usually ok. It was likely caused by squatting pretty heavy while wearing completely beat up shoes (I'm a cheapskate and an idiot). I now need to walk around the house with Asics on or orthopedic sandals. Pain is still there, but I have good days / bad days. I've had tendonitis issues for years, mostly in my arms. Anyone else have foot problems? It SUCKS!!!