Spirit XT485ENT, Owner'S Manual

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CALORIES program will challenge your ability to sustain your energy output for an extended period
of time.
Speed: This program follows a quick progression up to the maximum speed level (default or user
input value) that is sustained for 2/3 of the workout.
Incline: The treadmill elevation is a quick and sustained progression up to the maximum value
(default or user input) for 90% of the workout duration.