Is one more accurate then the other?
3 comments
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John Litschert Hi Jeff,
Both locations should yield good data but some of the metrics will show small differences. The reason for this is that the foot is not a rigid body and the sensor will "experience" slightly different movements in the two different locations. Also the shoe will move relative to the foot in slightly different ways in the two locations so this will also be reflected in the data. The best option is probably to pick the location most convenient for you and stick with it for awhile so you can get a good understanding of how different conditions, paces, and shoes affect your data. -
Alan Grose I've noticed that when lace mounting on some shoes, the mounted angle can change significantly based on how high or low up the laces I place the mount.
For instance, when mounting at the bottom of the laces closest to the toe, the runScribe can be almost horizontal. But when higher up, closer to the ankle, it can be at a 30-40 degree angle.
The heel mount has it very close to vertical, which I imagine the setting Lace vs Heel gives it a baseline position.
Does the mount angle skew any of the metrics? Is there a preferred position?
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John Litschert Yes, the preferred position is about midway up the laces with the tab from the cradle pointed toward the ankle. When it gets too flat it will skew the data a little. But more important, some runners tend to "slap" their forefoot down at foot strike (or soon after) and if the sensor is way down by the toes it can generate a lot of rattle or noise in the signal and make it harder to find foot strike. Plus it can generate an artificially high impact G.