An article of footwear includes an upper and a sole assembly secured to the upper and including a support assembly. The support assembly includes a plate positioned beneath the upper and a plurality of transversely extending elliptical tubular members positioned beneath the plate. At least one of the tubular members is formed of a first portion, a second portion spaced from the first portion by a first longitudinal gap, and a third portion spaced from the second portion by a second longitudinal gap.