As with most things in life, too much of one thing can cause problems, and spending most of your day on your feet is no exception. Foot and leg fatigue, general soreness, leg swelling, varicose veins, back and shoulder problems, as well as knee and ankle pain are all associated with prolonged periods of being on your feet. Those that work in jobs that require you to be upright for 8 hours a day are particularly at risk for developing foot issues and associated pain. It is even worse for older workers as they may develop arthritis and joint pain after long years of working in this position.