Best treadmills 2021: the best running machines to get you road fit, indoors

The best treadmills to help you train at home just like you're at the gym

Best treadmills best running machines
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The interest in the best treadmills has increased significantly in recent times, for very obvious reasons. As people seek to get fit and lose weight at home, suddenly a treadmill feels more essential and less of a foolish luxury. Indeed, treadmills are the go-to home cardio machine for many.

Running on a treadmill is the perfect way to offset a sedentary lifestyle – getting your 10,000 steps per day, but at speed and within the confined walls of your home. You will have to pay for the privilege, alas. At least £500 / $600 for something solid and into the low thousands for the high end gym-style treadmills.

However, this kind of thing can typically be found with a reduced price tag if you hunt for it and even the more basic systems are a good way to get the body moving... without leaving your front door. 

Check out the list of online retailers below and also, the shops where you can buy treadmills, rowing machines, exercise bikes and more.

best treadmill best running machines

(Image credit: Getty Images)

How to buy the best treadmill

Of course, something like the LifeFitness Platinum Club Series sits at the top end of the budgetary scale – it's got the word 'platinum' in it, so what did you expect? – but that's not to say there aren't great choices to suit less extravagant tastes.

Prices range from around £160 / $200 for the really basic, self-propelled models, but these tend to offer a very unrealistic running experience and fall apart after a couple of uses, so really the sweet spot between performance and price starts at around £600 / $700.

A good, mains-powered treadmill is judged on its running deck, which has to absorb the impact of a run while simultaneously representing an outdoor surface, as well as keeping the amount of noise it produces to a minimum.

Naturally, the more money you spend on a treadmill, the more technology is thrown at it. So if you like tracking stats, running along with a virtual partner or ingesting some multimedia, then it's worth opting for the machines with built-in screens or reliable smartphone connectivity.

Or, you can buy a basic model and also get the best exercise bike, best elliptical or best rowing machine added to your pain cave. 

best treadmill

(Image credit: JTX Fitness)

RRPs can be punitive but you'll found the usual online-shopping suspects tend to offer enormous discounts off sports equipment of this nature. Just make sure there aren't any enormous delivery and set-up charges involved, especially for the larger, fancier stuff. Our price widgets will always pull in the lowest price offered by our retail chums.

One final tip: sports scientists have found that runners tend to exert less energy when pounding the miles on a treadmill, presumably due to the springy running board offering an extra boost. So, if you want to keep fit indoors, much sure you place the speed on a faster setting than you think you need.

And is it's speed you are after, you will need some additional gear too, like the best running shoes and for tracking heart rate accurately, the best heart rate monitors. If you need to isolate yourself from your surroundings at home, you might also want to wear the best running headphones.

The best treadmills, in order

best readmill: JTX Sprint-5

(Image credit: JTX Fitness)

1. JTX Sprint-5 Home Treadmill

Best budget treadmill

Max speed: 18 kph
Incline: 0-12%
Power: 2.5 horse power
Running area (cm): 140 x 48
Reasons to buy
+Folds neatly+Decent incline+Cushioned running belt
Reasons to avoid
-Running area is comparatively small

As good as most high-end running machines are, most recreational runners won't pay top dollars for the fastest/widest and most powerful treadmills. If you are after a decent indoor running experience and not planning on spending all of your life-savings on a treadmill, the JTX Sprint-5 might just be the perfect choice for you.

The newly updated 2020 model is capable of producing up to 12% inclines and speeds up to 18 kph. The relatively small running deck might feel a little weedy compared to treadmills you might have tried in gyms before, but the compact dimensions also make it a great option for those short on space.

The running deck features an 8-point suspension system and CSC springs to create a forgiving running platform, which can reduce impact by up to 30% and also make running on the JTX Sprint-5 relatively quiet too. The vertical grab handles are a nice touch, as they allow for steep incline power walking with the added bonus of heart rate monitoring. The built-in speakers and numerous HIIT workout plans are also nice touches. 

For under a grand, you are not going to get anything better than this.

best treadmill: Assault AirRunner

(Image credit: Wolverson Fitness)

2. Assault AirRunner

More than just a running machine

Reasons to buy
+A beast of a workout+Burns more calories 
Reasons to avoid
-Not a traditional running machine

• Buy the Assault AirRunner for £2,999 at Wolverson Fitness

The Assault AirRunner does so much more than a standard treadmill. It doesn't sport the typical motor-powered belt like others, but instead feeds off user input to crank up resistance and adapt with effort.

It also feels like running on air, while the slightly kicked-up design means there really is no limit to how hard you can push yourself on it. Designed with HIIT in mind, it is great for cranking up the pace in a split second, without the awkward wait for a belt to catch up.

Worried about parting with the dosh? Its steel frame and handrails, corrosion resistant hardware and a slat belt running surface are built to last up to 150,000 miles of use. 

best treadmill: Life Fitness T3 Treadmill

3. Life Fitness T3 Treadmill

Another cracking, pro-grade machine

Reasons to buy
+Slick Track console for stat fans+Comfy FlexDeck running surface
Reasons to avoid

A name that will be familiar to anyone who frequents the gym, Life Fitness produces top quality equipment that can also be introduced to the home with minimum fuss. 

The standout feature on this model is the Track console, which easily connects to smartphones and tablets in order to harness the power of the excellent Life Fitness app. A powerful FlexDeck shock absorption system is said to reduce impact on joints by 30 per cent. It's fairly expensive but you get what you pay for. 

Oh, and you'll need a decent amount of room at home because this is, quite predictably, a big ol' unit. 

best treadmill: KETTLER Sport Arena Treadmill

(Image credit: Kettler)

4. KETTLER Sport Arena Treadmill

Ideal for recovery, HIIT workouts and anything in-between

Reasons to buy
+Slow starting speed+Shock-absorbing deck

The Kettler Sport Arena Treadmill has one of the slowest starting speeds (0.3 km/h) on the market, making it ideal for recovery as well as complete beginners. With this treadmill, you can gently ease yourself into running training without having to worry about the weather outdoors.

The fully shock absorbed deck will make running less demanding on your joints as well more pleasant for the downstairs neighbours. For added peace of mind, the Kettler Sport Arena Treadmill also comes with a 3-year parts and labour warranty including lifetime on the frame and motor.

On the other end of the intensity-spectrum, the Kettler Sport Arena Treadmill also offers seven HIIT (high intensity interval training) programs straight out of the box. HIIT training is an excellent way to lose weight and to maximise training efficiency, should you be pressed on time. HIIT workouts are made possible due to the high maximum speed (18 km/h) and the incline capabilities (up to 12%) of this treadmill.

The Kettler Sport Arena Treadmill supports Bluetooth connectivity so you can play music through the speakers of the running machine. Not only that but once paired, you can control the playback on the phone with the dedicated buttons on the console of the treadmill.

best treadmill: York Fitness Active 120

5. York Fitness Active 120

Best cheap treadmill

Reasons to buy
+Folds up to save space+Built-in pulse monitor
Reasons to avoid
-Speed restricted to 16kph

This is a great entry-level treadmill that'll suit many casual/skint runners just fine. Space will likely be one of the major factors in the decision for or against a treadmill at home, which is why many are designed to neatly fold flat so they can be stowed against a wall.

The mains-powered Active 120 from York Fitness features an easy belt folding mechanism and wheels, so the unit can be moved around the room with minimal effort. A 1.25 horsepower motor delivers speeds of up to 16kph (just under 10mph). That's a low slower than a gym machine but a perfectly adequate pace for occasional joggers.

Tech on board includes hand sensors for an acceptably accurate heart rate read out, full LCD display and 13 preset programmes aimed at a number of fitness goals. A slim line belt could prove a problem for more portly users, however.

Best treadmill: Technogym Myrun

6. Technogym MyRun

The best gym-level treadmill for home use

Reasons to buy
+Sexy design+Clever app connectivity+Gym quality but small size
Reasons to avoid
-Quite large

This compact running machine won prestigious Red Dot and iF design awards for its small but beautifully formed exterior. An impressive quantity of features is crammed into the MyRun's svelte frame.

Perhaps the killer feature is a punishing maximum incline of 12 per cent. That's great for training for fell runs and general cardio conditioning.

The built-in screen gives basic run information but things gets really smart when synced up to a tablet via a built-in Bluetooth connection.

From here, it's possible to relive outdoor runs via data captured from the TechnoGym App, experience a workout session that adapts to music in your library and receive detailed analysis of running style and ways to improve.

The MyRun machine is also the first to feature a surface that adapts to the way you run and absorbs impact to reduce the risk of injuries without sapping power.

Despite all that power, it's designed to be set up in a matter of minutes. Just follow an incredibly speedy DIY assembly process, plug it into the wall and get running. 

Admittedly, the price tag will be at the very top of most treadmill budgets but TechnoGym supplies its products to some of the UK's best gyms, and it knows a thing or two about how to create a realistic running experience that reduces the chance of injury and will go the distance. This machine is also Zwift compatible, which is a major plus.

best treadmill: Life Fitness Platinum Club Series

7. Life Fitness Platinum Club Series

The best premium treadmill

Reasons to buy
+Insanely robust+So many features+Top quality running deck
Reasons to avoid
-You'll need to remortgage

Holy sweet mother of pearl, this is one eye-wateringly expensive machine, but then if you really must have gym-quality kit in your abode,  there really is only one brand to consider. It's an absolute unit and weighing a massive 206kg, you are going to want to have it professionally installed and then leave it in that place forever. But its 16-inch touchscreen tablet and Lifescape, Zwift Run and RunSocial connectivity means that you won't really want to move it.

Plus, it works with Netflix, online radio and much more, so even if you give up running, you can always use it as a bizarre, lounge-based entertainment console.   

best treadmill: Adidas T-16 Treadmill

8. Adidas T-16 Treadmill

One of the best treadmills under £1,000

Reasons to buy
+Cushioned running deck+Rapid top speed+Folds up pretty small
Reasons to avoid
-Basic info screen-Heavy on the old Adidas branding

• Buy the Adidas T-16 Treadmill for £899 at Sweatband

The T-16, from popular German sportswear brand Adidas looks a bit spindly at a glance, but it actually possesses a very generous 51cm wide running deck. That's excellent considering the unit itself measures no more than 84cm in width, and means you get more space for elaborate interval training, sprints and other such cardio-based folly, without eating into precious floor area at home.

The 2.75hp engine allows running speeds of up to 18km/h (11mph), which is a fairly challenging pace for most mere mortals, as well 15 levels of incline that are easily adjusted from 0 per cent to 15 percent thanks to the multitude of buttons on the centre console.

Other areas of the treadmill are a little basic, with a rather old-school digital readout, and built-in speakers that wouldn't be a substitute for your headphones even if you use the ones that came free with your mobile.

Even if it's not quite as robust or clever as rivals on this list, the T-16 is still a solid, pacey offering for those looking to train hard at home.

best treadmill: ProForm Pro 1000

9. ProForm Pro 1000

Pro-spec without the pro price tag

Reasons to buy
+Steep incline setting+Workout fan to keep cool+Pro-grade motor
Reasons to avoid

Coming in at just under £1k, this isn't the cheapest machine on the list but it is also no way near the most expensive, yet it offers some extremely competitive features.

These include a generous 12 per cent incline gradient, built-in workout fan, 32 pre-set workout programmes and an LED display that offers all sorts of fitness metrics to suit various training regimes.

Great for heavy use, the treadmill features a professional grade motor that is built with high-grade components and features a dynamically spin-balanced assembly (whatever that means) to power the treadmill up to a top speed of 22kph/13.6mph. 

That might not be full commercial gym sprint pace, but it's more than enough for a domestic jog. 

best treadmill: Reebok ZR8

(Image credit: Reebok)

10. Reebok ZR8

Top treadmill for extra cushioning

Reasons to buy
+Soft landing+Foldable+Top quality
Reasons to avoid
-Cheap monitor 

Sitting comfortably at the 'affordable' end of the spectrum, this offering from Reebok packs some pro-spec features that feel rather generous for the money. A clever 'ZigTech' cushioning system on the deck disperses the impact energy across the length of the running deck, helping to protect your joints, while the safety cut off clip is something that is typically seen on more expensive models.

Although easily folded and stashed away, the running deck has been designed with long-legged joggers in mind and the unit has been rigorously tested to withstand users that weigh up to 17 stone. Alas, the digital display feels a bit cheap on this model and the myriad buttons aren't quite as neat nor easy to get on with as others on this list but then what do you expect of the world's 9th best treadmill? 

best treadmill: Nordictrack S25

(Image credit: NordicTrack)

11. NordicTrack S25 Treadmill

A folding option that isn't flimsy

Reasons to buy
+Foldable+Fitness app compatible+Decent incline
Reasons to avoid
-Heavy-Buttons and display feels cheap

The NordicTrack line of fitness equipment neatly treads a line between the affordable and the well bolted-together. Its treadmills are chunky and even this foldable item behaves like a borderline professional unit when used.

The motors is powerful, allowing for a max speed of 20km/h - more than enough for most fitness fans. Plus, there's a 10% incline setting, which is more than enough to punish those thighs and glutes on more targeted workouts.

The switches and screens tend to lift the side down a tad, but there's a specific clip for housing a tablet, which is great for use with the compatible iFit fitness app (available for a subscription fee).