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| Table of Contents | 
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| Before You Begin | 1 | 
| Unpacking the M9.21i or M9.21si Low Impact Treadmill | 1 | 
| Setting Up the Low Impact Treadmill | 3 | 
| Installation Requirements | 3 | 
| Assembly Instructions | 3 | 
| Checking the Alignment of the Running Belt | 8 | 
| Using the Low Impact Treadmill | 9 | 
| Locating the ON and OFF Switch | 9 | 
| Using the Magnetic Safety Key | 9 | 
| Understanding the Electronic Console | 10 | 
| Displays on the Electronic Console | 10 | 
| Keys on the Electronic Console | 11 | 
| Customizing the Display | 12 | 
| Changing the Display to U.S. Standard or Metric | 
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| Turning the Smart Rate Display On or Off | 
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| Selecting the TIME or DISTANCE prompt | 
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| Working Out on the Low Impact Treadmill | 13 | 
| Using the Quick Start Feature | 15 | 
| Retrieving the Previous Workout Program | 15 | 
| Pausing Your Workout | 15 | 
| Cooling Down After a Workout | 15 | 
| Ending Your Workout | 15 | 
| Changing the Interval Course Profile | 16 | 
| Using the Weight Loss Program | 17 | 
| Using the Manual Course Program | 18 | 
| Using the Random Course | 18 | 
| Using a Preprogrammed Course on the M9.21si | 18 | 
| Creating Custom Courses on the M9.21si | 19 | 
| Deleting Custom Courses on the M9.21si | 19 | 
| Using the Precor Heart Rate Option | 20 | 
| Wearing the Chest Strap Transmitter | 20 | 
| Utilizing the Heart Rate Interactive System | 21 | 
| Using the Heart Rate Course | 21 | 
| Correcting Inconsistent Heart Rate Readings | 22 | 
| Getting the Most Out of Your Workout | 23 | 
| How Hard Should I Exercise? | 23 | 
| How Long Should I Exercise? | 25 | 
| How Often Should I Exercise? | 25 | 
| Maintaining the Low Impact Treadmills | 26 | 
| Cleaning the Equipment | 26 | 
| Changing the Battery in the Chest Strap | 26 | 
| Storing the Chest Strap | 27 | 
| Aligning the Running Belt | 27 | 
| Adjusting the Tension of the Belt | 28 | 
| Obtaining Service | 29 | 
