Is there the "perfect" stride/form to help increase running speed. At the running store he actually told me to shorten my stride to hit with my whole foot instead of my heel. This helped with the injury I had. They have a clinic to analyze your run I should go to. I'm at about a 35 minute 5K right now, and would like to get down to 30. I don't appear to be one of those natural runners that can just randomly run fast.
Re: running stride/form tips
BFP#1 "Watermelon" born 3/2011
BFP#2 "Pumpkin" 7/14/12 ~ EDD 3/23/13 ~ Natural M/C 8/3/12 @ 7 weeks
BFP#3 "Pineapple" born 4/2013
BFP#4 "Grapefruit" EDD 3/29/16
BFP#1 "Watermelon" born 3/2011
BFP#2 "Pumpkin" 7/14/12 ~ EDD 3/23/13 ~ Natural M/C 8/3/12 @ 7 weeks
BFP#3 "Pineapple" born 4/2013
BFP#4 "Grapefruit" EDD 3/29/16
PP is right, avoid running with arms across the body.
Try not to bounce (reduce your vertical distance)-- it's a waste of energy and you want to go forward, not up.
Staying on the front of your foot (toes & ball) is best-- stay off the heels.
Train your core regularly. Also add more gluteal training. Many runners are quad/hamstring dominant, which is a sure formula for eventually injury, and much less efficient than running from the glutes. Clients of mine who have added heavy gluteal training (single-leg squats, kettlebell swings, t-lunges, etc.) have cut minutes off their race times.
Also work on hill sprints-- they will help you develop the back-body power that will really propel you in a race.