Spirit XE795 Owner's Manual page 27

Strength
This program has a gradual progression of resistance 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 glutes. A brief cool down follows.
Interval
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.
CALORIES
This program follows a quick progression up to the maximum resistance level (default or
user input level) that is sustained for 2/3 of the workout. This program will challenge your
ability to sustain your energy output for an extended period of time.
FUSION
This program takes you through high levels of cardio & strength 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.
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