JLL S400 Review: 18 Programs and 20 Incline Levels (2017 model)

JLL S400 Treadmill

Updated Feb-2017: This review has been updated with changes in the 2017 version of the JLL S400 and extended as a result of more detailed testing this time round.

The JLL S400 Premium Treadmill is the latest in fitness equipment and has many different features and additions that make this an ideal treadmill for any home gym setup.

The JLL is on par with many treadmills you would find at your local fitness center. Unlike many home models JLL provides superior functionality and a solid 5-year warranty on the motor and lifetime warranty on the frame.​

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Key Features of the JLL S440 Premium Treadmill

  • 16-point cushion deck shock absorption system
  • Electric auto-incline with 20 levels up to a 12% angle
  • Large 5.5" LCD screen with blue backlight
  • 15 pre-set running programs and 3 customisable programs
  • Good quality speakers 
  • Bluetooth and USB connection for iPod/iPhone/mp3 player connectivity

Functions and Performance

Don’t want to figure out your own program? No one does. People want to jump on their treadmill and go for a run without putting a lot of thought into speeds and varying inclines. For a person that wants to see results and doesn’t want to sit down and plot their own program, the S400 is perfect.

There are technically 12 programs built in for you to start with ranging from easy to difficult.If you want to take complete control over your program, you can. The first three presets are able to be programmed by you. This is great for the proactive person that wants to sprint for a minute and then lower the speeds to build muscle with inclines.

There are even high-powered speakers, so you can connect your iPhone or other device to the treadmill and listen to your favorite songs while you run.

JLL S400 LCD Screen

My one criticism is the h​eart rate monitor in the hand rails. These are difficult to use when running at a moderate pace and not always accurate. I would have liked to see the ability to connect a heart rate strap via the otherwise excellent Bluetooth capability.

The treadmill also now comes equipped with a pause function for emergencies or for just taking a break. You can pause your workout by pressing the STOP button once and then when you are ready you can continue from where you left off.​

Noise Level

Once you step foot on the treadmill, you’ll notice that this treadmill is a little different than others. Why? There is a built-in shock absorption system meant to help you get the most out of your running.

The JLL S400 Premium Treadmill has a 16-point cushion deck that reduces the not only sound from each stride hitting the running deck but also the impact on your knees and joints - making this an impressively quiet treadmill.


The JLL S400 Treadmill has a DC continuous power 2.5 HP, 1800 W motor and peak power of 4.5 HP or 3350 W. Don't know what that means?

This is a great motor delivering speeds up to a max speed of 16 km/h. Unless you are Usain Bolt you will not outgrow this treadmill anytime soon.

Incline Levels

Want to test your endurance even more? Using the 5.5” LCD display, you’ll be able to change between 20 different incline levels. You can easily adjust the elevation with the incline buttons that are located on the handrail. The handrails also have the speed buttons and heart rate sensors built-in.

You can achieve a higher intensity workout and accelerated weight loss with the 20-level incline which is equal to a 12% incline. 

Size and Weight

The JLL S400 is solidly built with quality steel. As with most folding treadmills there is sometimes vibration at higher speeds especially with larger runners. This is a reasonable tradeoff in my opinion and not a big deal given the construction of this treadmill.

JLL S400 Size and Weight

The JLL S400 dimensions are:​

  • Assembled Dimensions: 170 L x 70 W x 134 H cm
  • Folded Dimensions: 110 L x 70 W x 134 H cm
  • Running Area: 135 L x 45 W cm
  • Product Weight: 69 kg
JLL S400 Dimensions

The video below from the JLL Fitness Warehouse will give you a good idea of the size and contruction of the JLL S400 treadmill.​

Assembly and Delivery

The treadmill comes with a two-man standard delivery, so you do not have to worry about getting it inside yourself.

It is very heavy (a good thing) and does require more than one person to move around. If you want it upstairs speak nicely to the delivery folks and they may talk it upstairs for you.

Assembly is relatively straight forward although the instructions are not the best I've seen. This is unfortunately common with Treadmill manufacturers taking some weird pleasure in seeing who can write the most confusing instructions!

Once assembled it is easy to fold and store away.

Max User Weight

The maximum user weight for this model is 120 kg (18st 8lb or 264lb). It also has adjustable weight settings in the LCD computer to allow you to correctly calculate the number of calories you're burning.

Compared to the JLL S300 Model

​The differences between the JLL S400 and the JLL S300 treadmill is the mostly size of the running area and the entertainment options on the machine. The JLL S400 treadmill boasts a running deck with an additional 12cm in length and 4cm in width compared to the S300. The JLL S400 treadmill also comes with Bluetooth connectivity.

So if you are average height or below and aren't interested in the Bluetooth feature then give the JLL S300 a serious look as it's 20-30% cheaper.​

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The JLL S400 Treadmill has many premium features, including digital LCD display and pulse sensor, which make it high-quality exercise equipment and a great addition to any home workout space. When compared to traditional treadmills from other brands, it far exceeds standards when it comes to the following:

  • Motor is high-quality, produces less noise and is energy saving
  • Digital controller technology provides a smoother change between speeds
  • The quality steel frame is flexible, strong, and durable—stronger than aluminum
  • Comes with surge protection to protect electrical circuits and appliances

You’ll find very little not to like with this model. It’s highly affordable, it’s durable, and the warranty is exceptional by all means. The LCD display tracks your vital statistics, such as calories burned, distance and heart rate. You can also connect via bluetooth to an MP3 player or iPhone/ iPod to listen to music through the high-powered on-board speakers.

The JLL S400 provides commercial-grade quality at a price meant for home use. Whether you’re trying to build stamina, lose weight or gain muscle, this is the ideal treadmill.