Lower body symmetry and running performance in elite Jamaican track and field athletes.

If we find that those elite sprinters with the best times also have the most symmetrical knees, is it because those with symmetrical knees do well in advance or is it that intensive training leads to both success and more symmetrical knees? Of course it is likely that cause and effect go in both directions, and there is a weak trend toward decreased knee FA with age in the athletes (r = −0.15, p = 0.22).

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By adding covariates, such as weight and age, knee and ankle symmetry remain as marginally significant predictors of athletic success at the highest level of elite performance.

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