@Fa5t3r - My mother gets pains in her legs sometimes and I've noticed that she gets bruises there occasionally as well and won't remember when it happened. I guess she probably needs to improve the circulation in her legs. I didn't realize that there were so many potential problems that can effect people with poor circulation.
Although I hate to say it but she will probably be most motivated by the fear that she'll develop visible broken veins rather than that she might possibly throw a blood clot. Vanity can actually be a good thing when it helps people to improve their health.