Walking is a very healthy form of exercise requiring little equipment other than good shoes. Do be aware, however, that some surfaces are better for walking than others on your musculoskeletal system.
Walking on a cushioned or rubberized track is ideal, because the cushioning of this type of track absorbs most of the impact of your walking. Some recreation centers offer this type of track. Grass is another good surface, but watch out for hidden dips or holes in the ground.
Walking on a surface with no give, such as concrete or a mall floor, is not your best choice, because this type of surface will not absorb much of the impact your body will experience. If you do choose to walk on such a surface, be extra careful to select highly cushioned shoes.