But what sort of hill training? Should I be doing downhill repeats? I'm not worried about any uphill stuff that comes in Boston. I'm strong on hills. No worries there. But I've heard that the continuous downhill begins to wear on you and catch up to you. Am I out in left field here? My Boston elevation chart shows miles about 5.8 miles of net downhill and less than 2 miles of uphill, with the rest being mostly flat. When I ran St Louis there was easily double that uphill, with about half of the downhill. Rolling hills (with the uphills equivalent to the series of hills at Boston's 16-20 mark) from miles 7-9 and repeated again at 22-24, and a 2.5 mile climb from 14-16.5 followed by 2 miles of downhill at 17.5-19.5. I just can't imagine that Boston's terrain is harder than St Louis.
http://www.marathonguide.com/coursemaps/elevationchart.cfm?MIDD=1192080406 is an elevation chart for 2007 St Louis (same course as 2008). So what is it about Boston that makes it tough for PR and is there a way to prepare for that?