I think we can all agree that generally the goal in racing is to get from point A to point B as quickly as possible. To that end, the less sideways movement, the better. With crossover gait, you've got a bit of lateral motion in not only the feet, but also the entire center of mass. This is NOT GOOD!
One Sided Injuries
The Perilous First Six Months
Single Leg Solutions
Band-Aid Solution or Fixing The Cause?
Pancake Butt = Injury Risk?
Great Racing As A Side Effect?
Changing Behavior Requires Changing Perception
Your Engine Must Match Your Body
The Side Plank Done Right
Consider the locomotion and movement patterns we use most often: Sitting, Rising from a chair (half squat), Walking, Running straight ahead. Then think about some of the common knee issues people face: IT Band Syndrome, Patellofemoral syndrome, (Exercise-induced knee pain in general). What's the link?