Results (
Thai) 2:
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During stair ascent and stair descent, the lower limbs move in a cyclical pattern
similar to that of level walking, and the gait cycle for both tasks divided into two
phases: the stance (support) phase and the swing phase. Each of the phases is
characterized by a distinct length of time spent in the swing and stance phases: stair
ascent (66% stance: 34% swing) and stair descent (60% stance: 40%swing)[9].In
terms of stair climbing the stance and swing phases are further subdivided into three
sub-phases during support and two sub-phases during swing. The stance phase
during stair ascent is subdivided into three specific sub-phases: 1) weight acceptance
(WA: the initial movement of the body into an optimal position to be pulled up); 2)
pull up (PU: the main progression of ascending from one step to the subsequent
step); 3) and forward continuance (FC: the complete ascent of a step has occurred
and continued progression forward occurs) [3]. The swing phase is subdivided into
two specific sub phases: 1) foot clearance (FCL: the bringing of the leg up and over
to the next step while keeping the foot clear of the intermediate step); and 2) foot
placement (FP: simultaneous lifting of the swing leg and leg positioning for foot
placement on step) [3] Figures (1‐5). Similar to ascent, the stance phase of descent is
divided into three specific sub phases:1) Weight acceptance (WA); 2) forward
continuance (FC: the commencement of single leg support and the body begins to
move forward); 3) controlled lowering (CL: the major portion of progression when
descending from one step to the next) [3]. The swing phase of descent is subdivided
into two specific sub-phases: 1) leg pull through (LP: the swing through of the leg);
and 2) preparation for foot placement (FP) [3] Figures (6-10).
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