Spirit XT185 Owner's Manual page 21

STRENGTH
Resistance: This program has a gradual progression of speed up to 100% of maximum effort that is sustained for
25% of workout duration. This will help build strength and muscular endurance in the lower body and gluts. A brief
cool down follows.
Incline: There is a quick climb to a moderate, sustained elevation that lasts the majority of the workout length.
SPEED
INTERVAL
Resistance: This program takes you through high levels of intensity followed by recovery periods of low intensity.
This program utilizes and develops your "Fast Twitch" muscle fibers which are used when performing tasks that are
intense and short in duration. These deplete your oxygen level and spike your heart rate, followed by periods of
recovery and heart rate drop to replenish oxygen. Your cardiovascular system gets programmed to use oxygen more
efficiently.
Incline: This program will spike similar to the speed profile, but in different segments (columns); this means that all of
your lower extremity muscles will be equally challenged throughout this program. The incline alternates between 25
& 65 % of maximum elevation
SPEED
INCLINE
INCLINE
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XT185
T readmill