AIUI you'll burn roughly the same amount of fat in each of those zones, you'll just use more glycogen the higher the intensity.
The reason the lower intensities are better are because (a) it's easier, but (b) most importantly, by not depleting your glycogen stores as much you're less likely to over compensate with food afterwards.
AIUI you'll burn roughly the same amount of fat in each of those zones, you'll just use more glycogen the higher the intensity.
The reason the lower intensities are better are because (a) it's easier, but (b) most importantly, by not depleting your glycogen stores as much you're less likely to over compensate with food afterwards.