Beurer AS 98 Mode D'emploi page 52

"Fat Burning" appears on the display if your current heart rate is between
50% and 60% of your maximum heart rate.
"Aerobic" appears on the display if your current heart rate is between 60%
and 70% of your maximum heart rate.
"Steady" appears on the display if your current heart rate is between 70%
and 80% of your maximum heart rate.
"Anaerobic" appears on the display if your current heart rate is between
80% and 90% of your maximum heart rate.
"Maximal" appears on the display if your current heart rate exceeds 90%
of your maximum heart rate.
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