When you learn (or better say practice) KM to use in combat, the practice sessions are very intensive (starts with 8 hours a day and goes down to between 4 and 6 hours a day at the end of the course) so this question I think is not really relevant. obviously you learn more than one technique, but those practice days involve more than just KM techniques, they involve sparing once a day, special training to increase agressivness etc. everything that one will need in combat.