“…Considering the digital extensor tendons of the hand, the excursion distance through flexing the proximal-interphalangeal (PIP) joint has previously been reported to range between 27.5 and 50 mm (Evans and Burkhalter, 1986;Spinner, 1984), whilst complete PIP flexion can be achieved in approximately 0.5 s. Hence, the mean extensor tendon gliding speed is approximately 100 mm/s. Data estimating the normal (perpendicular) force on the tensile region could not be identified in the literature; however, given the adjacent tissues are typically aligned in parallel, it is estimated that the normal load is relatively low ( $ 1 N).…”