This describes the consistency of the results obtained. At the moment this type of testing has gained a lot of support. It is used in a lot of back testing systems but it has NEVER been tested in court. If the results are low then the repetitions are closely matched to each other (in other worlds a COV of 0 would mean each rep was the same). High results could suggest the subject needs more practice. High results are often used to diagnose psycho/musculskeletal problems. A High figure is expected during an endurance test.