Coach John Walker breaks down the best stance for a 40-yard dash to help lower your times. He also demonstrates with his athletes different exercises you can do to enhance your speed starts. Work on this technique for 20-30 min a couple days a week.
Coach John Walker breaks down drills you can do to help your speed mechanics. These are drills that you can do 2-3 times a week as your warm-up for your speed training workouts
Karif Byrd from Get It Done Sports gives you a speed ladder progression workout to help you develop fast feet.