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Thank you for purchasing a KEYS treadmill! The MS4200 and MS4400HR were designed to meet your
needs for cardiovascular exercise.
Before you start, please read the Owner’s Manual and become familiar with the operation of your new
treadmill.
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Remember to take the time to perform the stretching exercises provided on Page 6 to avoid injury.
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Do not stand on the walking belt while pressing the Power button or Start/Stop button.
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Always adjust the speed of the treadmill in small increments as this treadmill is capable of high speeds.
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If you are taking medication, consult your physician to see if the medication will affect your exercise
heart rate.
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If you have heart problems, you are not active, and/or are over the age of 35 years, do not use the pre-set
treadmill programs or start an exercise program without first contacting and receiving approval from your
physician.
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To avoid the risk of electrical shock, always keep the console dry. Do not spill liquids on the console.
KEYS recommends a sealed water bottle for beverages consumed while using the treadmill.
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Please review the following picture below to familiarize yourself with the listed parts. This
manual covers several treadmills, so the one pictured below may not be identical to your particular
model.
Before You Start
PAGE 5
SAFETY LATCH
ELECTRONIC DISPLAY
CONSOLE
WATER BOTTLE HOLDER
(WATER BOTTLE NOT INCLUDED)
SIDE HAND RAILS
CIRCUIT BREAKER
UPRIGHTS
MOTOR COVER
WHEEL
REAR ROLLER
ADJUSTMENT BOLTS
FOOT RAILS
WALKING BELT