I'd do an experiment: take your HR up to 190 for a minute, then walk and note where it drops at 10 second intervals over the walking minute. This should be a recovery walk, NOT a powerwalk pace. Do you have a paper a pencil handy? Post back and let me know.
Mel
OK, so here we go:
1 minute @ 190 achieved by hitting 6.5 on the treadmill
Recovery walk heartrates:
10 seconds: 170
20 seconds: 170
30 seconds: 170
40 seconds: 170
50 seconds: 170
60 seconds: 170
I didn't get to about 140 until 3 minutes after my last 10 second interval above.
5 minutes later after cooldown: 110
So that's it right? I'm hopelessly unfit, right?! LOL