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LifeSpan Fitness TR4000i Review

Quick Summary

LifeSpan’s TR4000i Folding Treadmill meets a unique need.

Most folding treadmills are built for walking, but the TR4000i is designed for running too.

Some high quality basics that runners appreciate are eight-point cushioning, a 60″ x 20″ workout area and a 3.25 CHP motor.

The electronics integration is appealing too; this treadmill can sync with mobile apps, play MP3s, charge devices and securely display your tablet computer.

Read on for the full FitRated review…


Model LifeSpan Fitness TR4000i

Our custom rating considers all of the treadmill's features, specs, warranties, and 100's of user & expert reviews, to save you time!

List Price

Suggested retail price, typically higher than the price you'll pay with our recommended retailers.

Best Price

Since prices change daily, this link goes to our preferred retailer for the current best price. Note: MSRP stands for Manufacturer's Suggested Retail Price.


Treadmill Speed is measured in Miles Per Hour (mph). Average running speed is 5-9 mph.

0.5 - 12 mph

Treadmill Incline measures the angle of the deck, and how steep it is relative to the floor (0% is flat, and 15% is like a steep hill).

15 Levels

The Treadmill Motor is what turns the belt as you run. We recommend at least 2 HP (Horsepower) motors, 2.5+ HP for jogging, and 3.0+ HP for running.

3.25 CHP

Treadmill Deck dimensions are measured in inches: Width x Length. The wider and longer the deck, the safer it is (55-60 inches long recommended for running).

20" x 60"

The Treadmill Belt is the surface you run on. The thicker the belt, the less impact on your joints. At least 2-ply (1 inch) recommended.

(3/4" Phenolic)

Some treadmills are designed to conserve space by folding up. This is a convenient option, but some features might be reduced.


Treadmill Programs allow you to complete a workout with changing speeds and inclines, without changing anything manually.

Max. Weight

Treadmill Max User Weight is the amount of weight, in pounds (lbs), that it can safely support, which can represent durability.

350 lbs
Heart Rate

Heart Rate programs allow you to track how many times your heart is beating per minute (bpm), and some control the workout for you.

My Zone Heart Rate
(2 Programs)

Dimensions are included to help you figure out if this treadmill will fit properly (Length x Width x Height and Height x Depth).

74.5" x 32" x 56"
Folded: 42" x 32" x 66.5"
Rollers: 2.5" Front, 2" Rear

Treadmill Display refers to the screen you'll look at to monitor workouts. LED and LCD displays are similar to TV screens.

Blue Backlit LCD
Cooling Fans

Treadmill Cooling Fans are designed to help keep you cool during an intense workout.

Accessory Tray

Some treadmills include an accessory tray for holding items such as water bottles, wallets, keys, or MP3 players like iPods.


Treadmills that include a sound system allow you to listen to your MP3 player/iPod through built-in speakers (no headphones).

Quick Controls

Quick Controls allow you to select speed, incline and even workout programs with the touch of a button (usually on the handles).


The warranty is a very important part of your investment. The longer the warranty, the longer you can get free/discounted repairs by the manufacturer.

Frame: Lifetime
Motor: Lifetime
Parts: 5 Years
Labor: 2 Years

Rating: 79.3%

Our Rating

Rating: 79.3/100. The TR4000i is LifeSpan’s best folding treadmill for runners. While other LifeSpan folding treadmills have 56″ tracks, only the TR4000i has a 60″ track to comfortably hold long-legged runners. Other key specs that appeal to runners are a 3.25 CHP motor and a deck with eight compression shock absorbers. Special features that enhance training are a power incline, wireless syncing with fitness apps, a sound system and a tablet holder — and that’s just a sampling. All in all, LifeSpan has built a folding treadmill for runners that doesn’t cut corners yet is affordably sale priced.


  • Easy to assemble
  • Easy to fold (Hydraulic shock assist)
  • 21 workout programs
  • IntelliKey simplifies program setup
  • USB for data sharing, device charging
  • Online fitness tracking with LifeSpan Club
  • Optional Bluetooth receiver
  • Holder for tablet or smartphone
  • iPod compatible
  • Two cup holders
  • Pedometer
  • 60″ x 20″ workout area
  • Top speed 12 mph
  • 15% power incline
  • Quick controls for incline and speed
  • 3.25 HP motor (Lifetime warranty)
  • 2.88 mm belt (Thickest of all LifeSpan folding treadmill belts)
  • Large rollers (2.5″)
  • IntelliGuard track pausing for safety
  • 350-pound user weight capacity
  • Great warranty


  • Short handrails
  • Large when unfolded (74.5″ L x 32″ W)


Good folding treadmills for runners are hard to find. The LifeSpan TR4000i fills a special niche by combining a long track and powerful motor with a folding frame. Its overall quality is high; for example, the tread belt is extra thick, the frame is steel, the side rails are aluminum rather than plastic… And this treadmill continues to impress when you look beyond the basics. Some highlights are an automated ramp, 21 training programs, music speakers and an optional Bluetooth connection.

Workout Programs

Move toward your goals with help from diverse built-in workout programs. The LifeSpan TR4000i has 17 preset workout routines that you can use at different challenge levels. There are five for weight management, five for healthy living and seven for sports training. Also included are two heart rate programs and room to save two customized workouts.

LifeSpan Fitness TR4000i Features

The programming screen is a 6″ LCD with blue backlighting. It shows Time, Calories, Distance, Steps, Heart Rate, Speed, Pace, Incline and Elevation Gained.

This treadmill lets you save session data to a USB drive. You can upload your stats to a free LifeSpan Club account online to chart your progress, plan workouts and more.
The USB port can also charge a mobile device.

An optional Bluetooth receiver ($29.99) for the TR4000i lets you automate the transfer of workout data. It supports Active Trac™ and Train & Trac™ apps for Android and iPhone, which work with MyFitnessPal and other fitness tracking programs.

A media holder can conveniently hold your smartphone or tablet for easy viewing during workouts. For audio you can connect your iPod and use headphones or the treadmill’s speakers.

The TR4000i can monitor your pulse wirelessly or with touch sensors. Wireless chest straps are sold separately.

For extra calorie burn and muscle definition the TR4000i provides a power ramp. Adjust it with quick controls or let preset programs take control… A three-speed fan helps you stay cool and keep training!

A safety feature is IntelliGuard. This pauses the track after 20 seconds if you step away.

To reveal floor space between workouts the treadmill’s deck can easily be folded upward. A hydraulic shock system does most of the work.

Unfolded this treadmill measures 74.5″ L x 32″ W x 56″ H. It folds to 42″ L x 32″ W x 66.5″ H.

Warranty & Guarantee

The LifeSpan TR4000i Folding Treadmill warranty provides the following coverage:

– Frame: Lifetime
– Motor: Lifetime
– Parts: 5 Years
– Labor: 2 years

Extended three-year and five-year warranties are available for $149 and $199, respectively. LifeSpan treadmill customers get a 30-day money-back guarantee.


The LifeSpan TR4000i is a special find. It offers the rare combination of a folding frame, a long track, creature comforts and overall high quality. Now sale priced at $1499 it’s easily a best buy among folding treadmills for runners.

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