the short answer is probably not. the long answer is maybe...
This study looked at gait variability asymmetry in small cohort of experienced distance runnners. They measured different variables at 1500, 3000, 5000, 7500 and 9500 m of a 10000 meter run (about 6.2 miles) on a treadmill. Generally speaking, variability was low and athletes were symmetrical for 5 of seven variables measured and assymetry, when present, was in flight time and impact forces Most aththletes were asymetrical for at least one variable as well.
Their conclusion basically said that being asymmetrical in a few variables is not abnormal and not indicative of asymmetrical gait and since many practitioners analyze symmetry (and variability) caution should be exercised when determining the need for intervention.
So what do we think this means?
these folks were symmetrical with low variability. In other words, when asymmetry was present, it was small
some asymmetry, in some parameters, is probably normal...but,it is usually small if it doesn’t matter. Keep in mind these were expreienced, uninjured folks. th results could have been different with a bigger cohort and less experienced runners and thus...
The study does not talk about inexperienced runners. Symmetry and/or asymmetry may not be normal for inexperienced runners
Results may have been vastly different if the run had been longer. The study did show that variability increased the further along on the run the athlete was.
We think asymmetry matters, particularly when it comes to hard deformities like torsions and versions, which change the biomechanics of that individual extremity and can be a diagnostic tool for future problems
perhaps asymmetry is significant in his population of runners on a subclinical basis
Hanley B, Tucker CB. Gait variability and symmetry remain consistent during high-intensity 10,000 m treadmill running. J Biomech. 2018 Oct 5;79:129-134. doi: 10.1016/j.jbiomech.2018.08.008. Epub 2018 Aug 16.