In the past, humans walked bare footed on natural ground, which in most cases was soft, and absorbed most of the shock created by the human step. Nowadays, most surfaces that are used to walk on are hard, such as bitumen, concrete and ceramic tiles, and rather than absorbing energy, they tend to reflect harmful shock waves back into our body. This is technically known as negative energy. Negative energy is transmitted by vibrations and will reach our nervous system causing permanent micro-traumas. These in turn promote the development of tendinitis, osteitis, and micro fractures, to name a few, which lead to soreness of the feet, hips, knees, back and lower head joints. The vibrations travel through tendons to muscle areas, forcing them to work against their natural dynamic movement. This results in persistent fatigue that leads to, amongst other things, swollen limbs.