In F1 2012 tires degradation was slow, even when you pushed them to the limits for lap after lap, but in F1 2013 the performance of the tires changes fast. (wolfsgamingblog.com)
Well, not so much running as staggering in a three - legged race of lap after lap. (nzherald.co.nz)
Imagine what it must have been like day after day, year after year, getting back into that pool, swimming lap after lap? (inc.com)