After several decades,jogging is still a very popular activity in the united states.many people like to go jogging early in the morning before work or after work in the evening. However , in the winter months especially,it may be dark during those hours.the help these joggers,a sports shoe manufacturer has invented a new kind of jogging shoe. These shoes have little red lights on the back of the heels. The lights are very small and lightweight. They are run by tiny batteries. With these new shoes,the jogger can feel much safer running along the road in the dark. The lights make the jogger can feel much more visible to the drivers of motor vehicles. This may reduce the risk of accidents