Best Compact Treadmill 5 Under Bed Machine Reviews

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Written by Penny Cooper

When you want an invigorating workout and a trip to the gym or even leaving the house is out of the question, some useful compact home equipment may come in handy. If you think treadmills are too bulky take a look at our guide to the best compact treadmill with 5 reviews.

We’ve spent an age compiling a list of five of the best compact treadmills, 4 of which, you can store under your bed.

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The compact 3G Cardio 80i is our personal favorite due to its overall great build quality and top features.

Our top 5 under-bed compact treadmills:

Our Reviews – The Best Compact Treadmill

We’ve chosen different sorts of compact treadmills that could each be suitable depending on where they’re going to live and how much use they get. Let’s get started with one of my favorite treadmills.

3G Cardio 80i Fold Flat Treadmill – Best Overall

Okay, this is a great treadmill and it’s compact but I will confess upfront that it’s not an easy fit under the bed unless your sleeping arrangements are different from mine.


So it fits the criteria of compact and it does fold flat to a height of 9.75″ and is a super machine. It can also fold to an upright position.

A surprising feature for a compact machine is that it has 15 levels of incline to simulate those hills increasing the pain. And those inclines are integral in some of the 8 pre-set programs, 4 of which are customizable.

That is, a maximum 15% incline, which, as I mentioned is a surprising feature. In fact so surprising as to be not correct. On further investigation we discovered that the actual maximum incline is 9%.

I’ve trained for marathons for 35 plus years and I must admit to not being a fan of treadmill inclines. I never use them unless they’re part of a set program so to me it’s no big deal.

But if you are particular about your treadmill inclines and 15% isn’t enough then the 3G Cardio 80i might not be the one.

The 2 front wheels make it easy to move around although they don’t swivel making it harder to relocate it precisely like under the bed.

The maximum speed is a healthy or exhausting 11 MPH quick enough for me and most runners wanting a thorough home workout.

The console shows what you would expect from a good treadmill, time, calories burned, distance, heart rate, number of steps, speed as well as incline level.

It has a large 3hp continuous-duty motor which should last a long time. The warranty on it is 5 years with a lifetime warranty on the frame.

A generous sized 18.5″ by 58″ running surface should feel safe running at full tilt.

Side rails are made from non-slip plastic which provides balance and another safety feature when beginning and ending your workout.

The major control keys, start, enter, up/down are big and the clear buttons get you started at the speed and incline level you dial in.

Yep, we think this is the best compact treadmill but it is reflected in the price which is 3 or more times the price of some other options we have chosen here.

Fold Flat Dimensions: 74″ x 33″ x 9.75″
Fold Up Dimensions: 39″L x 33″W x 70″H


  • Upright and flat folding
  • No assembly required
  • Solid build with lifetime warranty
  • High maximum speed (11 mph)
  • 15 incline levels
  • Great cushioning
  • Weight capacity 325 lbs


  • Not easy under bed storing
  • Portability could be better

GYMAX 2-in-1 Folding Flat Treadmill – Lowest Height When Folded

This compact treadmill provides its users with the fitness potential they need without taking up much space or being bulky.

This model has two modes, one for walking as an under-desk machine with arm handles removed and one for running with arms in place.

It has a quiet motor that shouldn’t disturb others in the vicinity.

With a speed range from 0.03 to 7.5 mph, you can adjust its settings with the armrest’s touch control system or if used to accompany a standing desk, with a remote control.

To be honest I didn’t feel safe when cranking the machine to its highest speed. I really don’t feel this was a running treadmill but more suitable for solid walking. In fact, the consensus here was that folded down and used for walking/jogging with a standing desk was the main function.

If a treadmill for walking is your main aim then this machine is a good choice. And as an activity there are a lot of health benefits from regular walking.

Besides the arms don’t neatly fold away and have to be screwed on or off. So, although the Gymax’s boast is true in that it folds extremely flat, only so when the arms are removed.

When used folded, there is a light sure going on at your feet. I don’t know what that’s all about and there’s no way to switch it off.

It also has a 5-layer shock-absorbing, non-slip running belt to cushion your joints and muscles. 


  • Maximum speed: 7.5 mph
  • Weight capacity: 265 pounds
  • Running area space: 16” x 40”
  • Overall dimensions: 49”x 27”x 42”
  • Folding dimensions: 52” x 27” x 5”
  • Motor: 2.25 horsepower
  • Available colors: Navy, black, gold, green, red, and silver


  • Quiet and powerful motor
  • 5-layer non-slip, shock-absorbing running belt
  • Integrated LCD monitor tracks workout progress (heart rate, calories burned, distance)
  • Handlebars have touch sensors to track your heart rate
  • Two workout modes for walking or running


  • No incline
  • The short cord makes it hard to plug into outlets
  • No pre-programmed workouts

Merax Electric Folding Treadmill – Good Incline Features

This treadmill is excellent for people looking for an affordable model. Users looking for a challenge would be happy with its maximum speed setting of 7.5 mph.

I boasts music via speakers but you can only use them via a USB enabled flash drive with your mp3 music. Who does that now. Best to get your own Bluetooth-enabled system going.

Besides the speakers didn’t have a decent bass.

417FBW+DhZL. SL500

It has three different incline positions to enhance your workout sessions.

It also has 12 built-in programs available through its interactive control panel. 

Its motor uses 1.5 horsepower and has energy-conserving and high-temperature resistance for prolonged use.

Similar to the Gymax above, we found the Merax to be less suitable for run training. I was going to say it was okay for the occasional burst but this had a downside too as you must continue hitting the plus button to get to your top speed – a bit annoying but hey ho.

Again like the Gymax this treadmill had only adequate room on the running surface.

All in all, though great value for a compact treadmill solution. 


  • Maximum speed: 7.5 mph
  • Weight capacity: 300 pounds
  • Running surface: 43.3” x 15.7” 
  • Unfolded dimensions: 54.2“ x 20.3” x 42”
  • Folded dimensions: 22.7“ x 19.2” x 48.6”
  • Motor: 1.25 horsepower
  • 4-layer PVC blend running belt
  • Pulse-measuring handle grips


  • 12 preset programs
  • Supports walking, jogging, and running
  • Three different incline positions
  • Quiet motor conserves energy and has high-temperature resistance
  • Built-in phone and tablet deck
  • Built-in cup holders and MP3 speakers
  • Touch screen adjustments


  • Default programs don’t encourage customization
  • It folds down nicely but not “under the bed” flat
  • It may not have enough workout programs for dedicated runners

RHYTHM FUN Under Desk – Cheapest (currently)

Out of all the picks on our list that don’t have handles, this compact treadmill has the lowest folding height for under-the-bed storage.

Its lack of a handrail makes it easy to store but we wouldn’t recommend it for the older walker/jogger or anyone who feels unsteady on their feet.

31fhPTbtVNL. SL500

We think its built-in one-key home control and compatibility with its Bluetooth speakers make it an essential must-have for people who enjoy interactive technology. 

Although its weight capacity might not be suitable for some users, it still has enough horsepower for people who enjoy continuous and rigorous workouts. 


  • Maximum speed: 7 mph
  • Weight capacity: 220 pounds
  • Running surface: 40” x 15”
  • Unfolded dimensions: 61“ x 30” x 44”
  • Folded dimensions: 61“ x 30” x 8”
  • Motor: 2 horsepower


  • Display panel monitors time, speed, calorie burn, and distance
  • Built-in Bluetooth speakers
  • One-key home button control
  • Uses a unique workout app and remote control


  • No incline
  • No preset workout programs
  • It doesn’t monitor your heart rate

Sunny Health & Fitness Flat Treadmill – Walking -Best Shutdown Features

This model might be ideal for people who prefer models that don’t require much setup time and who don’t want to run.

This compact treadmill lacks adjustable handlebars but makes up for it for its amazingly flat, easy-to-store nature. Just 6.5″ high.

319SG3QIQIL. SL500

Because of the lack of any handles it might be a good idea as per the manufacturer’s recommendations that this walking treadmill be used next to a table or something similarly stable.

This is especially relevant if the user is unsure of their balance.

Its 14” x 5” built-in monitor allows you to track your steps, distance, and speed, among other things. You can also change your workout’s intensity with its remote control.

We also appreciate its enhanced power-saving and safety features that halt it when it’s not in use. This might be a valuable asset for those who might have more limited time for their workouts.


  • Maximum speed: 3.75 mph
  • Weight capacity: 220 pounds
  • Running belt: 39” x 14”
  • Dimensions: 50” x 21.5” x 6.5”
  • Digital monitor dimensions: 14” x 5”
  • Motor: 1.5 horsepower


  • Power-saving technology turns off the treadmill after ten minutes
  • Automatically pauses if left idle for five seconds
  • Remote control operation
  • Its flat design makes it easy to store
  • Suitable as an under desk treadmill


  • Narrow walking area
  • No incline and handlebars
  • Speeds aren’t suitable for running

Treadmill Features to Look For

Before picking your ideal compact treadmill, there are several components you should consider before making your final decision. These technical specifications equate to how your treadmill operates.

How Much Space It Takes Up

Companies design their compact treadmills for easy storage, so you’ll need to know how much space it can take up before and after setting it up by measuring every corner of the room you want installment to take place.

Some models don’t require setup tools and might be more comfortable if they weigh less and have wheels for efficient transport.

Maximum Weight Capacity

When picking out an ideal treadmill, you’ll need to know how much weight it can withstand from its user. If you exceed its limits, it may not function correctly during your workout.

Motor’s Horsepower 

Horsepower refers to the power rate a machine uses to complete a task and affects your treadmill and workout’s overall quality. Typically, it would help if you looked for treadmills that have at least 1.5 HP. 

Motors with higher horsepower have higher weight capacities and workout capabilities.

Speed Settings

If you prefer jogging or running over walking, you may want to consider a treadmill’s highest speed settings. Typically, if it has a higher speed range, its running belt should accommodate the simulated distance you traverse.

Display Setting Options

TR1200i console

When keeping track of your workout progress, it would be best to have a compact treadmill that monitors your speed, distance traveled, heart rate, and how many calories you burned. It would also be wise to find a model that has a timer to time your routine.

Additional Features to Consider

Although many compact treadmills have similar designs and features, some may have functional or cosmetic features that others lack. 

Control Panel Access

One attribute you should consider is the control panel design and functionality. It should be easy to reach and use.

Some models use traditional buttons, while others have touch screen controls for enhanced convenience. 

Incline, Decline, and Other Presets

If you like challenging yourself during your workouts, you may want to consider getting a treadmill with incline and decline settings to elevate your heart rate and burn more calories during your workout.

Here’s some more information about how incline walking benefits your health. Some models incorporate preset programs to match your workout preferences, from time to intensity.

Shock Absorption

If you’re concerned about joint and muscle pain during your workout, it would be best to consider finding models incorporating running belts with shock-absorbing layers.

The more layers it has, the more friction you can feel during each workout session.


Although I love the very cute Sunny Health & Fitness’ small build and shutdown features. There is nothing to even fold up.

So for a convenient very neat setup, this treadmill is the choice for anyone who just wants to keep active and not want to go over 3.75 mph. Which, for me anyway, is a very brisk walk these days.

For the features and quality and the fact it can fold flat or in an upright position I chose the 3G Cardio 80i. It has it all from a high max speed of 11 mph to a safe and cushioned large running area.

Check out our article on treadmills for older people or less the athletic, shall we say, and more information on low impact cardio machines.

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Penny is a Personal Trainer currently training as a wellness coach. She gained a BA in English at Edinburgh University. Redundancy from retail management hastened a move to helping people get fit and writing about all things fitness in middle age.

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