Can the Equisense Motion measure while lunging?
You can use your Equisense Motion when working on a lunge as soon as you use a saddle or surcingle. You obtain the same data as if you would sit in the saddle. The only indicator which is missing is the symmetry which can only be determined wile trotting on a straight line.
The Motion cannot measure the symmetry of your horse on a circle (as pretty as the circle may be) given the fact that your horse 'walks in a circle' which naturally leads to an asymmetry.