Crossfit Journal recently had some videos with Nicholas Romanov trying to teach a training method called 'Pose' to a heavily muscled crossfit athlete. Kind of awkward videos got me thinking about the difference between the lessons of distance running and crossfit.
One aspect of 'Pose' should be very easy to understand for a crossfit athlete who knows that olympic lifts are all about efficient posture beneath the bar. This is the concept of posture, balancing your weight over your bones and joints rather than holding yourself in a posture with muscular tension.
The big learning curve seems to be related to the Pose idea that any muscular contraction which doesn't move you foward, interferes with foward motion. So, there is always some core engagement, but you'll have a lot of habitual muscular tension while sprinting that works against you. Running faster should always mean running 'easier', using fewer muscles and more relaxed focus.
Crossfit doesn't encourage you to run far. Running efficiency is not about intensity. The best way to learn to let go of non-productive muscular tension and find your most efficient posture is to run for longer distances in the woods at slower pace. Focus on efficient breath and posture will strip away the muscular tensions that become more evident the longer your run.
Running faster is not about pounding pavement harder, it requires an almost silent footstrike and efficient turnover with a relaxed foot. Mountain trails or any non-paved surface requires a relaxed foot ready to adapt to the uneven surface. The woods distract and relax you, until you fantasize about predatory cats or Freddy Krueger and that's just a bonus adrenaline to make the next mile go by faster. You get tired after the adrenaline rush, and once more must focus on deep breathing and moving foward using less muscular energy.