Lorenzo the Magnificent wrote:
http://fittish.deadspin.com/bond-on-the-run-a-close-look-at-daniel-craigs-form-1740907377
No discussion of leg speed velocity.
Calling out someone's running form is a jerk move.
"It isn't gymnastics or figure skating, you know."
-Emil Zátopek
Praising someone for looking relaxed (if accurate) is appropriate.