State the percentage range of maximal heart rate for the aerobic training zone.

Calculate Andrew's heart rate range in beats per minute (BPM) for his aerobic training zone.

The aerobic training zone is generally considered to be between 60% and 80% of your maximum heart rate (MHR). Andrew's MHR is 180 bpm. Lower limit = 60% of 180 = 0.60 x 180 = 108 BPM. Upper limit = 80% of 180 = 0.80 x 180 = 144 BPM. Therefore, Andrew's aerobic training zone is 108-144 BPM.