There are several ways that you can increase your running speed. First, it is going to take work, and it will not happen overnight. Running bursts of sprints can help to improve the long-distance running. Run for 30 seconds and then walk for a minute, repeating this 15 times.
Take a short break, and then do it again. After a couple of weeks, increase the time that you are sprinting to 45 seconds, decrease the walking time to 45 seconds, and repeat. Adding small amounts of weights to your ankles can also help with speed. Running with small amounts of weights will help build muscle and lung function, but when the weights are removed, you might find your speed has increased, due to not having the extra weight to pull you back.
There are also several programs that you can use to increase your running speed. Endurance training is one. By using the endurance training you are not only training your body to go longer distances, but you can also begin to run faster as your body adjusts to the new routine.
Before beginning a workout routine, you should consult with your doctor