?? [ more to be added ]
Phases of stroke-cycle
[ set-down instant ]
0 = (optional) overlap of feet on ground for
1 = pull-back (foot is on ground with ankle-joint
in front of hip-joint of pushing leg)
2 = push-back (foot is on ground with ankle-joint
in back of hip-joint of pushing leg)
[ lift-off instant ]
J = (optional) both feet off the ground
R = recovery of leg forward
two-leg coordination of the stroke-cycle
Timing coordination for smaller moves
Leg Recovery move for running
this timing is mostly driven by the requirements of the
main leg push. Key optional point is hold back on the start of
recovering the Leg forward during phase J. After lift-up, keep the leg
extended with the foot out behind. After the next foot sets down, start
the Leg recovering forward.
Arm-swing forward-backward for
(left Arm coordinating with left Leg)
phase 1 of Leg: arm-backward-swing move decelerates and
stops, and immediately arm-forward-swing move starts and accelerates.
phase 2 of Leg: arm-forward-swing continues
phase J of Leg: arm-forward-swing decelerates and
stops, and immediately arm-backward-swing starts and accelerates.
phase R of Leg: arm-backward-swing continues
For Torso forward-backward moves
options for doing a Torso forward-backward move:
more . . .
That’s why race-walking can still be pretty
That’s why race runners keep their cadence
high and their leaps no longer than necessary.