With the fall marathon season already underway, countless runners are in the thick of it, trying to juggle workouts, recovery and life. If you know someone who’s mid-build (or if that someone is you), here are four telltale signs you’re knee-deep in marathon training. 1) You think in weeks, not daysAt this point, you don’t live by a calendar; you live by a training plan. Unless you’re committed to a strict, depressing pasta-and-rice-every-night lifestyle, marathon training has you burning through food (and your bank account) faster than your 5K splits. For those who don’t understand, marathon training isn’t just a sport, it’s a lifestyle.