Life Fitness T30/T35 - Manual (Page 25)

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Each column, as seen in the WORKOUT PROFILE WINDOW and the chart above, represents one interval. The overall
duration of the workout determines the length of each interval.
1 to 9 minutes: A workout with a duration of less than 10 minutes is insufficient for the Hill program to complete all four
phases adequately. The program, therefore, condenses a workout of this duration at various stages.
10 to 19 minutes: The interval durations initially are set at 30 seconds for a 10-minute workout. For every minute over
10, each interval increases by three seconds. A 15-minute workout consists of 20 intervals at 45 seconds each.
20 to 99 minutes: All intervals last 60 seconds. If the user adds minutes to the pre-set duration while the workout is in
progress, the program adds hills and valleys that are identical to the first eight intervals of the Interval Training phase.
This pattern repeats until the workout is completed.