Okay, results from the testing are in. These are running based (so cycling and swimming will be different). VO2 Max is 42, which is okay (not stellar, but stellar wasn’t expected, to be honest). Max Heart Rate was 195 (!!!), Anerobic Threshold was 191, which puts the heart rate training zones at:
Z1 157-168
Z2 168-179
Z3 179-191
Z4 191-195
Z5 195-???
Compare this with the standard formula (220-age), where MHR would be 185, a full 10 beats lower than the tested number.
I suspect this means on average I’ve been training in Z1-Z2 almost exclusively, with only occasional dips into Z3. That’s not a bad thing, and it’s good that I’ve been generally staying in Z1-Z2. It’s also nice to know I don’t have to try to stay below 157 (which was excruciatingly slow). I do need to consider training into 3 and 4 on occasion, but not right at the immediate moment. For the time being it’s running in the zones I’ve been using, but with a bit more confidence, and no need to stay down lower than is useful.