Using a 255, I've got Brighton marathon on 6th july and had great success with Garmins half marathon coach last year, so using their adaptive coach for this marathon. It only now occurs to me (yes, I know!), that 5 weeks out which includes the fortnight to taper, the longest run it's had me do is 1hr 51 mins and this week its "long run" is only 1hr 04 minutes!! I've set the plan up for a 3hr 40time (but anything under 4 will do!) so I'm starting to panic!!! Help! (I've been told that Garmins ethos is less reliance on loooong runs, and just run often. is that right?) Thanks. Fyi my race predictor is saying 4hr 8 mins...