Representative results from a man and woman tested in this study for the torque measured during the instrumented straight leg raise test (iSLR). Passive tissue stiffness was measured as the slope (∆y/∆x) through the common range of motion (Megrad, 20-50°), and peak torque applied during the iSLR (Memax). Maximum leg excursion angle (leg°max) was used to represent hamstring extensibility in this study (male, 67°; female, 87°). Observe the lower Megrad, and greater leg°max for the female participant, but similar Memax. Note that VAS pain scores were 66 and 4 mm respectively for the male and female participant results presented here.