Working on my run

I have never been a strong runner and I am not afraid to admit it. For the past two years I have worked on my running here a there and feel I have become stronger at it, but it could still get better. My run distance has increased in the past few weeks with the training I am doing for sprint race in May. I have found some drills to work with and look to see if this will help my times any in the weeks to come.