Hi Lioness, I don’t know if a 2hr. test is necessary to enable a specialist to figure out if you have the type of vertigo caused by misplaced crystals. My gal had me lay down with my head to the side and slightly off the table, if my eyes started moving back and forth uncontrollably she was able to diagnose me. Next, by doing a few different head maneuvers she could tell where exactly the crystals were stuck and determine which direction and position would move them to. With me, it was not always the same ear or canal but i am happy it has not returned. I did experience it for about a year and often thought it was caused by the gabapentin along with other side effects which were temporary but I don’t know for sure. I did not have to do any exercises myself, after a visit with specialist I was fine until the next bout which was probably every 2-3 months.