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. 2020 Aug 12;55(2):92–98. doi: 10.1136/bjsports-2019-101767

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© Author(s) (or their employer(s)) 2021. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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Preventive mechanism of Spraino: in case of a bad landing, Spraino minimises the otherwise high shoe–surface friction at the lateral edge of the shoe. This minimises the horizontal ground reaction forces (GRFs), thereby bringing the GRF vector closer towards the joint centre which serves to prevent excessive ankle inversion and internal rotation.