“…It follows that forefoot
components with greater energy absorption/return (i.e., lower stiffness) may result
in greater COM push-off work and lead to a reduced collision on the intact side
(Agrawal, Gailey, O’Toole, Gaunaurd, &
Finnieston, 2013; Morgenroth et al,
2011; Segal et al, 2012). These
concepts have successfully predicted important features of gait in persons with
lower limb amputation compared to those without, including asymmetrical
center-of-mass mechanics, increased intact-limb loading, and increased work
requirements (Adamczyk & Kuo, 2015; Houdijk, Pollmann, Groenewold, Wiggerts, &
Polomski, 2009), though the effects also depend on push-off timing (Malcolm, Quesada, Caputo, & Collins, 2015;
Ruina, Bertram, & Srinivasan, 2005;
Zelik et al, 2011). Additionally, these
differences are strongly influenced by walking speed, with various outcomes
increasing, decreasing or staying constant across speeds (Adamczyk & Kuo, 2015).…”