Today I did a session of hill repeats in order to pinpoint my max HR. There are a couple of standard formulas (220 - your age and 208 - .7 x age). According to those my maximum heart rate would either be 173 or 175. During my hill repeats today my max was 173, which is a little unusual to be so close to formulas. Some people can be off by as much as 10bpm. Obviously I'll adjust if in a future workout or race I top 173 but right now I have a very good idea of what to aim for in my workouts.
As this is my first update since my Seattle report, I had a godo week of training post race. Just over 40 easy miles in 5 workouts. This week I'm off to a good start with an easy 5 on Sunday to test the monitor and a tough hill workout to establish my current max.