string life

Hey everyone, I’ve been looking into the string life recommendations over on Racketpedia, and I noticed they often mention something like "12 hours of play life" for certain strings. My question is: are those 12 hours based on total time on court, or do they refer specifically to active playing...

I have been tracking use of my racquets, and now have about 50 hours on my Volkl V-Sense 10 Tour with Gamma Live Wire XP 17g strings. I have used Babolat String Savers to extend the life of the strings, otherwise I would have broken them after about 25 hours. I play rec level doubles, so not...