I'm just trying to get a sense of what tension loss really means. For example, Genesis Spin X is rated for a tension loss of about 20 lbs. What exactly does this mean? Is that after a certain amount of time/play? Let's say it is strung at 53 lbs...does this mean after a certain amount of time it will actually be 33 lbs?? If someone can clarify, it would be much appreciated.