I do like to walk as part of my exercise regime. I add leg weights to bump up the intensity. I found some unique leg weights that I just started using. They are from a company called Gaiam. It is a site for green living, fitness, yoga and organic products. They look like a sleeve that extends from your ankle to the top part of your calf and the weight is distributed evenly unlike ankle weights which can be a bit cumbersome. I ordered a size large and my calf measures 14.5 inches at the widest point. They have a chart with measurements. The site is www.gaiam.com They have a very good return policy also.