resistance and incline changing from 12/12 to 18/18 (incline/
resistance). When the level of intensity reaches 18/18, it is
necessary to slow down the rpm (strides per minute) to maintain about
14 caloies burned per minute. This way the pulse rate remains in the
target zone of 130 to 140 (the target zone will be different depending
on age and other factors). In the past, workouts peaked at 18/18 twice
and went as low as 5/5.
