Gait variability and symmetry during a run

Study analyzes changes in gait variability and symmetry in distance runners:

Gait variability and symmetry remain consistent during high-intensity 10,000 m treadmill running

"Being asymmetrical in a few variables is therefore not abnormal".

See also:
10kmlauf.blogspot.com - Schrittlänge
onlinelibrary.wiley.com - Using real‐time biofeedback to alter running biomechanics: A randomized controlled trial
sciencedirect.com - Is changing footstrike pattern beneficial to runners?