Thus, according to this
theory, the genesis of insulin resistance lay entirely with the
increased availability of FFAs, and the muscle responded normally
to that signal to limit glucose uptake and oxidation. However,
research done in our laboratory (34), as well as in others
(35), has shown that the glucose–fatty acid cycle was inadequate
to explain regulation of muscle glucose uptake in a physiologic
setting. Rather, alterations in metabolic function within the muscle
are more likely at the heart of the genesis of insulin resistance.