Here are some of the tips that will help you in improving your speed:
Change how you breathe
Learning how to breathe while running at faster speeds takes practice. Use both your nose and mouth while inhaling and exhaling to get the maximum amount of oxygen to the muscles. Also, try belly breathing—fill the stomach, not the chest, with air on each inhale.
Pay attention to your toes
The whole body plays a role in speed—from your head to your toes! Try dorsiflexion (arching your toes up toward you shins) while running. That way less of your foot hits the ground for a quicker stride turnover.
Jump rope
Take a lesson from boxers and add jump rope workouts to your routine. Boxers know that fast feet mean fast hands. But for runners, fast feet just equal fast feet.