Yay for the lift, spread and reach exercise!

Toe spreads and squeezes are aimed at strengthening specific intrinsic foot muscles—the dorsal and plantar interrosei, according to Irene S. Davis, PhD, PT, director of the Spaulding National Running Center and a professor in the Department of Physical Medicine and Rehabilitation at Harvard Medical School in Boston. Doming or foot shortening exercises contract most of the muscles on the plantar side of the foot, and help to strengthen the abductor hallucis muscle

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Goo YM, Heo HJ, An DH. EMG activity of the abductor hallucis muscle during foot arch exercises using different weight bearing postures. J Phys Ther Sci 2014;26(10):1635-1636.