Repeatability of a bending stiffness test for snowboarding wrist protectors

Abstract Snowboarding wrist protectors are typically designed to limit impact forces and prevent hyperextension. The standard for snowboarding (ISO 20320:2020) includes a test measuring their bending stiffness, when fitted surrogate. This serves as simple means of assessing the ability Wrist protector stiffness measurements have been shown be influenced by surrogate design, strapping condition, surface compliance. Currently, there is lack knowledge on repeatability measurements, previous studies conducted tests during one session. study investigated test, testing two (short long) surrogates (compliant stiff), under three conditions (loose, moderate, tight), across repeated sessions. Test session had significant effect ( p < 0.05) torque values, with large size $$\eta_{{\text{p}}}^{2}$$ η p 2 > 0.14), indicating limited between Despite this repeatability, values increased both angle strap tightness, reported before, consistent trends in results. outer compliance did not significantly affect protector’s sensitivity nor condition.