A lot of injuries and even slower times are often caused by poor form. There’s a number of root causes of poor form, including muscle weakness or imbalances. However, it’s easy to complete some simple running form drills to correct poor form. The following video shows a couple of drills that will really help.
Maintaining better position (not leaning too far forward or backward) for a longer time during your run will result in you being able to maintain a faster pace and also reduce the possibility of injury. If you’re out of alignment, you’ll find it harder to breathe and it also puts a strain on your back.
I believe glute stability is essential to maintain proper form. Although not discussed in the video, I highly recommend regular exercises to maintain glute strength. Here’s an excellent glute article to help.
Coach Nate shows a few exercises that will help with alignment. It’s only a 7 minute video, check it out and let me know what you think.