The hamstrings do more than help propel the body forward; they also control foot direction (by twisting the tibia in the knee joint) and affect ground contact (by altering foot pronation/supination). Tight hamstrings are a common condition also remediable, not by stretching, but by retraining the muscles to their normal length and responsive pliancy. Tight hamstrings produce the sensation of heavy legs and, by preventing the knee from straightening completely, causes the quadriceps muscles (fronts of thighs) to tighten and grind the kneecap against the knee joint, leading sometimes to kneecap pain (chondromalacia patelli). In this condition the natural arch of your foot is much lower and might also be flat enough to touch the ground. The problem is hence known as flat feet or fallen arches as well. Though the problem looks minor it can majorly affect your lower body. Many a time people with fallen arches experience difficulty walking. They might also experience pain in the knees after walking or running. Joint pain, heel pain and hip pain might also be associated with flat feet. Apart from the medication to restrict the pain, using corrective shoes for flat feet is known to be the most effective way to cure the problem. Susan Revermann is a professional writer with educational and professional experience in psychology, research and teaching. She holds a Bachelor of Arts from the University of Washington in psychology, focused on research, motivational behavior and statistics. Revermann also has a background in art, crafts, green living, outdoor activities and overall fitness, balance and well-being. The back is prone to injury. Twisting, turning, and all of the awkward poses we strike whilst doing our job make us prone to injury. Learning proper posture helps. Learning to bring your work to you (raising your chair so you're not bending down) helps. But then there is the issue of rotator cuffs. Birkenstock's became fashionable due to the super models who were wearing and recommending them. The inner sole has a sort of support shape which cushions your foot. This means that Birkenstock's can look a little large as your foot fits inside the foot bed. Once referred to as Dr Scholl, Scholl has been making a good range of summer footwear for years. At one time these sandals were notoriously uncomfortable though. These days they seem to have incorporated comfort and style as well as retaining that "good for your feet" appeal. The novel, custom-designed bearing units comprise a pair of angular contact, thin section, double-row bearings in a housed assembly, ready for fitting to the ellipsometer equipment. The bearing units are low torque, accurate running and incorporate stainless steel rings and balls. The bearings are oil lubricated, as the application is low speed and low torque. The bearings are manufactured to super precision standards (higher than ABEC 7). The angular contact, thin section double-row bearings have an outside diameter of 28.5mm with a width of just under 9mm and a bore of 19mm. Additional arch support, or orthoses, are also beneficial and an important aspect of treatment. These range from off the shelf arch lifts to a custom-made device that is made from a mold of your foot. Often orthotic devices can be moved from one pair of shoes to another. The human body is truly fascinating; they are the perfect balance ofbones, flesh, and natural body fluids. Special cushioning is present inour joints and at vital regions in any place on the body that bearsweight. Being flat footed, you most likely have an overpronation running pattern, meaning that the shoe support needs to be focused on the arch area of the sole.