+1 to Bob plus a few xtra. items
HRM - TIME in ZONE. While in the zone I concentrate on cadence & breathing. I try to ignore what my legs are telling me.
After that I would say know TIME on a known course with same wind pattern. The wind around here is very consistent. I try to only test with a tailwind so that the # is the best it can possibly be.
Last edited by agoodale; 05-24-12 at 11:29 PM.