In addition to the joints, there are various tendons and ligaments that connect the thigh bone and the shin bones. There are also some sacs filled with fluid, that help to provide stability and smoother mobility. Without the complex choreography involved in leg movement, walking comfortably would be close to be impossible without the knee.Wearing trousers with knee pads, while working will reduce much of the risks associated with knee problems that can be experienced as we age. Using knee pads when you're working will help to dramatically reduce the risk of having knee problems later on in life. While we may be taking them for granted in our youth, people who may active use of their knee such as athletes can attest to the fact that the knees are perhaps the most important joints as far as mobility is concerned.