Each double stance period accounts for 10% of the GC, while single stance typically represents 40% (60% total). The 2
limbs typically do not share the load equally during double stance periods. The swing phase for this same limb is the
remaining 40% of the GC. Ipsilateral swing temporally corresponds to single stance by the contralateral limb. Slight
variations occur in the percentage of stance and swing related to gait velocity. Duration of each aspect of stance decreases as
walking velocity increases. The transition from walking to running is marked by elimination of double support period(s)
Each stride contains 8 phases where Stance is comprised of 5 gait phases (i.e., initial contact, loading response, mid stance,
terminal stance, preswing); with the remaining 3 phases occurring during swing.The first 2 gait phases (0-10% GC) occur
during initial double support. These phases include initial contact and the loading response. While this term is appropriate in
normal gait, many patients achieve heel contact later in the GC like one wearing H1 Suit. The joint motion during this phase
allows the transfer of weight onto the new stance phase leg while attenuating shock, preserving gait velocity, and
maintaining stability. Swing phase by the contralateral limb corresponds with single support by the ipsilateral limb to
support body weight in the sagittal and coronal planes. The first half of single support is termed mid stance (10-30% GC)
and is involved with progression of the body center of mass over the support foot. This trend continues through terminal
stance (30-50% GC). This phase includes heel rise of the support foot and terminates with contralateral foot contact.The
final stance element, preswing (50-60% GC), is related functionally more to the swing phase that follows than to the
preceding stance phase events. Preswing begins with terminal double support and ends with toe-off of the ipsilateral
limb.Three unique phases characterize swing, including initial swing (60-73% GC), mid swing (73-87% GC), and terminal
swing (87-100% GC). The swing phase achieves foot clearance and advancing of the trailing limb [10].