Life Fitness X9 User Manual page 31

E H R
XTREME EART
This intense, varied workout is designed to help more experienced users to break through fitness improvement plateaus.
The workout alternates between two target heart rate* goals as quickly as possible. The effect is similar to that of running
sprints. When setting up the workout, the user enters a target heart rate. After a warm-up, the intensity gradually increases
until the user reaches the 100 percent target heart rate (85 percent of the theoretical maximum
is maintained for a stabilizing period. Afterward, the intensity decreases. When the heart rate falls to the 75 percent goal, it is
maintained there for a stabilizing period. The program repeats the alternating of intensity levels, continuing this pattern for the
duration. See the chart below. Throughout the workout, the user must grasp the Lifepulse system sensors or wear a Polar
heart rate chest strap to enable the program to monitor the heart rate.
† Defined by the American College of Sports Medicine's "Guidelines for Exercise Testing and Prescription" as equal to 220 minus an individual's age.
* Target Heart Rate (THR) is a percentage of the theoretical maximum (HRmax). For example, a 40-year-old user's recommended THR for the
EXTREME HEART RATE TM WORKOUT is 153. The workout program targets a standard 85 percent of the maximum, so the equation would be (220-
40)*.85 = 153.
30
TM W
ATE ORKOUT
100% THR
Stabilizing Period
EXTREME HEART RATE Workout Profile
153
Stabilizing Period
User Example (40 year old / 153 recommended THR)
100% THR 100% THR
Stabilizing Period Stabilizing Period
75% THR 75% THR
153
Stabilizing Period Stabilizing Period
115 115
† ) goal. Then, that target rate
153