MUD Mired in time...

The Wheel Use a wheel (a circle) with a diameter the size of the subject. Wheel diameter = 1 stature

When dealing with a full stride (one full period made from two steps, R & L) we use statures (= diameter) for length measurements. It’s OK to carry cms or inches along for the ride. Pretend scientists like that. If dealing with one side of the body, one leg, or one step then it is very convenient to use the circle’s RADIUS as our measure rather than the diameter. Same circle. So a 75% stature stride would have a 75% half stature step. Makes everything easy. We can also use arm span or mid neck to finger tips.

Notice that the radius wheel center is rather close to the center of mass. If you also measure everything else in statures including the walkway ground, then those wide graph envelopes shrink like heated electrical wire coating. Data gets very tight. A ½ mile walk by 4 subjects, one a monster wrestler, another a slim but 7 month pregnant woman, her husband short but totally muscular and me – a schlub… walking data looked the same when using statures whereas it was all over the place in metric or royal measurement. ?? The ½ mile becomes something else for each subject.