There are many great exercises for runners that can help you increase your speed and flexibility, but often we find that runners neglect core strength and taking the time to do dynamic stretching.
Here are some great core exercises to keep you strong during your runs. Exercises such as crunches, toe touches, Russian twists, and planks will include a great deal of core strength. Another way to help with running form would be dynamic stretching before and after a run. This would include high knees, butt kicks, hip rotations inward and outward, power skips, and lunges.