I don't pay a lot of attention to the "fat %" of calories burned but rather the total calories burned. The theory is that more of the calories you burn are from fat (rather than glucose) when you work out at a lower intensity than a higher intensity, but overall you'll burn more calories total working out at a higher intensity. Hope that helps a little; I'd do some searching on the site for your particular HRM to see what those numbers really mean.
Denise (Half Fanatic #1279) - PDT Time Zone
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