With everyone associating playing time in 'hours' to their tennis strings, I need some help with what is considered an hour. Is an hour on the court an "hour" on the strings. You're not hitting the entire time, changing sides, chasing balls, etc.... Is an hour on the strings the same as an hour of hitting drills and feeding balls ? If you play a set in an hour, would that be considered an "hour" on the strings ? Just curious...Thanks!