I did a run gait analysis with Hanna today and got pretty good results.  We strapped a Stryd power meter to her show to not only get visual improvement in her stryd, but also some hard, objective numbers.  Here are what some of the numbers that a Stryd power meter gives:

Power – energy in watts

Horizontal power – % of power that is producing foward motion

Running Effectiveness – how effiicent someone is turning watts into speed

Stride Length – distance (in meters) covered between steps in meters

Vertical Oscillation – distance (in centimeters) that the center of mass goes up during a stride.