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. Author manuscript; available in PMC: 2010 Aug 25.
Published in final edited form as: J Biomech. 2009 Jun 10;42(12):1903–1908. doi: 10.1016/j.jbiomech.2009.05.009

Fig. 2.

Fig. 2

Typical plots of the time history of mid-hip point height during (a) gait-slip and (b) sit-to-stand-slip. Also shown are the events of interest (vertical lines). They include slipping (right) limb touchdown (R-TD) in gait and seat-off (SO) in sit-to-stand, recovery step liftoff (L-LO) and touchdown (L-TD). The actual fall time, which is identified as the instant when the fall-arrest force exerted on the load cell exceeds 30% body weight, is also marked as a vertical line. Horizontal lines illustrate the values of hip descent at the actual fall time.