MUD Mired in time...
Those in turn allow time intervals derived from timed events: Right stance = the total time any part of the right foot is on the ground Left stance = the total time any part of the left foot is on the ground Swing phase (right or left) is when that whole foot is off the ground (follows on toe-off until swinging heel strike. Good? (Sorry, this too is wrong – we’ll get to it later...) See? THIS ==> IS <== what is used in the bulk of what you read. These are the key time markers of Braun & Fischer and Inman and the followers thereof. It's everywhere.
Above we see a series of connected wheels. Each wheel has a radius (like a spoke of a wheel). The green center-of-mass to hip-center wheel is seen here rotated 90 degrees for size comparison. It matches the red radius of the ankle-metatarsal wheel. Thus we have additive circumferences that each travel at best speeds. “Harmonics have two parts which are the wheel rolling distance per turn and the rotational time for a full cycle (the ‘period’). The interaction of these 5 wheels produce the very low (nearly level) sine wave that the body travels when walking. The body can weld portions together to create other (especially very large radius) wheels. Such joining is often called joint stiffness and is commonly attacked with chisels and other weapons of center-of- mass destruction .
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