Starting from obese group to fitness freak people a large number of people keep a positive thought towards the powered treadmill.
And it’s backed by fact! So many heavy-weight people weighing more than 300 lbs have changed their lives using this amazing machine.
Heavyweight people need a special kind of treadmill to hit the goal and that treadmill need to be easy to use, move & control, have mind-boggling weight capacity, robust build, sufficient running surface, shock-absorbing system, safety handrail, easy folding system, and powerful motor with outstanding speed.
In this article, you will see details about the best treadmill for 350 lb runners. I hope from there you find your precious one!
Best treadmill for 350 lbs : Top 10 treadmill
Everyone loves to eat, right? But what about keeping weight in control? Ah! Not that easy, however, you can’t deny the importance of being fit. If you have been looking for a brilliant treadmill that would aid you in bringing back the old confidence & reviving the new you then you are on the spot!
For a heavy user like you, a list of the top 10 treadmills for 350 lb was made. The details are below. So let’s see which one suits you best!
1. Sunny Health & Fitness T7643
The Sunny Health & Fitness T7643 is a wonderful automatic treadmill that has an ultra-robust frame made of alloy steel.
Plus, it can take tremendous user weight up to 350 lbs which makes it a great choice for the heavyweight user. In addition to that, cushioning of the Sunny T7643 reduces a significant amount of shock which keeps your joints & legs at ease.
Besides, the hydraulic soft system of the Sunny T7643 increases the overall safety. During folding this system ensures a slow folding of the treadmill down to the floor. Though the treadmill is heavy, the top-rated transportation wheels make it easy to roll and store without much effort.
Despite having a fixed incline the Sunny T7643 does not offer you any extra incline & decline position. A digital monitor is fixed on the front but that’s too basic.
You will get a decent top speed of 6 MPH backed by a 2.5 HP motor which will help you to cut off the excessive fats in your body. Speaking of the assembling, you will find the Sunny T7643 hassle-free & smooth.
Moreover, the running deck of 44.7 x 19.5’’ is an ample amount of space for most runners. For your convenience, this amazing unit comes with long handrails which will give you enough support if you are a runner with bad knees.
Despite having a fixed incline the Sunny T7643 does not offer you any extra incline & decline position. A digital monitor is fixed on the front but that’s too basic.
I recommend you buy it if you want a treadmill that can support heavyweight users for a speedy walk or mid-speed running.
- The robust frame supports users up to 350lb
- A soft drop system for safety plus durability is good
- Easy to assemble plus easy to move
- Adequate running deck space with long handrails
- Shock absorbers reduce pressure on joints
- One fixed incline & no decline option
- A digital monitor is cheap
2. Nautilus Treadmill Series T618
With a mind-boggling weight capacity of 350lb, the Nautilus Treadmill Series T618 is loaded with lots of features.
This first-class treadmill comes with an ultra-large running deck space with a size of 20 x 60’’ that allows even the taller runners to run smoothly. Unlike many others, the Nautilus T618 treadmill comes with a 3 ply, 2.5 mm thickness highly durable belt.
Plus, you have the option to increase your workout intensity by using the 15% auto incline feature. As a part of safety, the Nautilus T618 comes with a SoftDrop folding system. The Strike Zone cushioning system of the treadmill reduces pressure on joints.
Besides, the Nautilus T618 is packed with a 3.5 HP motor which lets you run at a stunning speed of 12 mph. One of the downsides of this treadmill is that it does not come with a space-saving design.
In addition to that, the DualTrack Blue Backlit LCD lets you read all the workout data. For your convenience, the Nautilus T618 treadmill wireless heart chest strap and pulse sensor are in the handrail.
Moreover, this wonderful unit has 26 built-in programs that allow the user to bring variation in their workout. You can select different programs for specific aims like interval training, cardiovascular endurance, etc.
This treadmill has Bluetooth which lets you connect it with a fitness tracking app like Nautilus Trainer 2 app. Though a bit pricey the Nautilus T618 would be one of the best treadmills for obese people.
- Heavyweight capacity up to 350lb
- Top-notch durable running belt
- 15% incline level, 26 built-in program
- StrikeZone cushioning cut down running shocks
- DualTrack Blue Backlit LCD shows data clearly
- Due to its large size not very good for storage
- Price is not affordable for everyone
3. OMA 6134 EAI Treadmill
If you are looking for a sturdy treadmill that welcomes heavyweight users then OMA 6134 EAI would be a terrific choice.
First of all, the OMA 6134EAI treadmill comes with an ultra-large running deck size of 60 x 22’’. Starting from a short-size user up to a taller user, anyone can use this treadmill smoothly.
Besides, the 15% auto incline level helps to make your running session very challenging which will cut the fat faster & alleviate your cardio level.
Plus, the solid quality commercial thickness steel increases the durability of the OMA 6134EAI treadmill & can take runners up to the weight of 350lbs. This top-notch unit has a 3.5 HP PMDC motor that allows you to run at a top speed of 12.4 mph without making any foul noise.
For your convenience, the OMA 6134EAI treadmill has two tablet holders, two item baskets & two Bluetooth speakers. Adding to that, the double hydraulic cylinder helps for slow lifting & dropping increasing safety.
In terms of assembly, this large running machine won’t give you a hard time. However, due to the heavy weight, you will find it very tough to move through the stairs.
Moreover, the running deck has a large HDF shell & 6 shock-absorbing cushions which will ensure a less impactful & softer running experience on this amazing treadmill.
You’re gonna love the looks of the 23’’ dot matrix screen that shows all relevant data like running speed, running distance, pulse rate, duration & calories, etc. Top to bottom the OMA 6134EAI is a killer treadmill!
- 15% incline with a high-level weight capacity of up to 350 lbs
- Impressive top speed of 12.4 mph & quiet treadmill
- Easy to assemble & large running deck with shock absorber cushion
- Outstanding 23’’ dot matrix screen for reading data
- Hard to move through the stairs
4. NordicTrack Commercial 1750
With the virtue of having a rock-solid build, the NordicTrack Commercial 1750 treadmill would be a peerless choice for heavyweight users as it supports up to 350lbs.
Plus, the NordicTrack 1750 has an amazing level of -3 to +15% auto incline which lets you have the feel of running at uphills & downhills. This wonderfulness not only brings variation but also gives you more challenges to increase your running level.
Besides, the wider or longer running deck surface of about 22 x 60’’ keeps you from falling on both sides which increases safety. Despite having a 3.75 HP motor under the hood this treadmill will ensure a quiet ride.
If you have a serious plan to shred extra fats then the 12 mph top speed will help you to reach the goal.
For your safety, the NordicTrack 1750 comes with a handrail that you can hold if you feel out of breath during running. Even the controlling of this one is easy & the 10’’ touchscreen works great.
In my opinion, this top-class treadmill has two downsides. One is that it’s so heavy that it would be hard to assemble alone. The second one is that the price of the treadmill is pretty high!
- Solid build quality has a high user limit of up to 350lbs
- Powerful but noiseless smooth motor
- Excellent 10’’ touchscreen display
- EasyLift helps for easy storing
- Extremely heavy for moving downstairs to upstairs
- Very expensive
5. IN10CT Health Runner Curved Manual Treadmill
The IN10CT Health Runner Curved Manual treadmill would be one of the best treadmills for big people.
This magnificent unit is so sturdy that it has the highest weight capacity of 400lb. As this is a manual treadmill with a curved belt design, it’s best suitable for the runner who wants to keep their intensity level between moderate and high.
Plus, no electrical option makes the IN10CT Health Runner treadmill a great environment-friendly one. This treadmill is a big no for runners with bad knees as it requires more physical effort.
Besides, the ample running space size of 17.16 x 61’’ allows users of all heights. Despite being too heavy, you will find it quite effortless to move the treadmill due to the high-end transport wheels & rear handle.
Also, the IN10CT treadmill does not need any assembling. It comes with a slater running belt with a pulley track system which ensures that the belt is not going to slip off.
Moreover, the rubberized belt also reduces the running impact on joints & muscles. To keep you updated about the running data, the monitor shows time, speed, total distance, calories burned, etc. Sadly the pricing of this treadmill is too costly!
Furthermore, your leg muscles work as the motor & you have full control over speed so when you make a stop it will stop immediately which raises the safety level.
Trust me, you won’t regret buying this wonderful treadmill.
- Adequate amount of running deck with 400 lbs weight capacity
- Curved running surface lets you shred faster
- Rubberized belts ensure a safe ride plus reduce shocks on joints
- No assembling & electricity is required
- Price is too expensive
- Not suitable for runners with injuries
6. LifeSpan TR1200-DT3 Under Desk Treadmill
The LifeSpan TR1200-DT3 Under Desk Treadmill would be the most appropriate for runners who need a running machine that can take the heavyweight user.
With a powerful 2.25 HP quiet motor, this outstanding treadmill will allow you to run at different speeds ranging from 0.4 up to 4 mph. The top speed of the LifeSpan guy makes it suitable for speedy walking and jogging.
Plus, the 2 ply belt of the treadmill is durable and lets you run for a very long time. Unfortunately, this low-height treadmill does not offer any incline or decline position.
Besides, the weight capacity of 350lb simply shows the level of the sturdiness of this wonderful treadmill. Along with that, the step-up height of 4.6’’ makes the machine one of the best under-the-desk treadmills.
Adding to that, the 5.25’’ non-slip side rails ensure that you don’t fall during the speedy ride. A stylish-looking console comes with an LED screen that shows you real-time running data like total distance, calories burned, running speed, running time, etc.
Moreover, the compact design of the LifeSpan & the nicely catered transportation wheels make it easy to store any corner of the house. Unlike many other treadmills, it does not need to be assembled after opening the package.
Furthermore, the 6 compression shock of the treadmill absorbs a good amount of impact which reduces the chance of any injury.
Considering everything, the LifeSpan TR12OO-DT3 would be a great purchase though the price is a bit higher.
- Stylish-looking LED screen showing data
- Remarkable weight capacity of 350 lbs
- Compact design helps to store easily
- Durable belt plus low step-up height
- The deck has a shock absorber plus a quiet ride
- Does not come with an additional incline or decline option
7. Bowflex T7 Treadmill
The Bowflex T7 treadmill comes with an incredible motor that generates a top speed of 12 mph. It would be an ideal choice for plus-size runners.
To bring variation to your workout, the Bowflex T7 comes with an auto incline feature that allows you to experience running at a 15% incline.
This beefy & ultra-robust treadmill can handle users up to 350lb which is fantastic! Plus, this powered treadmill is packed with a larger running surface of 20 x 60’’ which provides comfort as well as safety.
Besides, if you have any previous injury issues then you will find it very friendly as it’s equipped with a comfort tech deck cushioning that reduces a major percentage of running shocks. The Bowflex T7 comes with a triple-ply belt which ensures high durability.
In addition, the SoftDrop folding technology of the Bowflex T7 makes folding efficient, safe plus effortless. Despite the folding system, this product is not easy to store due to its large size.
For your convenience, it comes with a large size console where you can easily control the speed & incline level. Moreover, the assembling of the Bowflex T7 would be quite straightforward plus easy.
Furthermore, it comes with a heart chest strap using which you can track your pulse & for tracking heart rate the pulse sensor is attached to the front fixed handlebar. This wonderful unit also comes with a 7’’ touchscreen & Bluetooth connectivity feature.
Now the question is will it be profitable to buy? Definitely yes!
- Mindblowing weight capacity of 350lb
- Durable triple-ply belt with enough running space
- SoftDrop system for efficient & safe folding
- Easy to assemble & let you run with a 15% incline
- Bluetooth connectivity, 7’’ touchscreen & larges size console
- Occupy larger surface for storing
8. 3G Cardio Pro Runner Treadmill
Are you looking for a heavy treadmill that has bundles of features for heavyweight runners? Then the 3G Cardio Pro Runner Treadmill would be one matchless choice without any doubt.
This well-built treadmill has a 3.0 HP motor which ensures no lagging during your high-intensity ride. All level users starting from beginner to pro-level can train on this treadmill due to the speed range of 0.5 mph – to 12mph.
Plus, the 3G Cardio treadmill has 8 built programs & 2 custom programs which provide the user’s option to bring variation in training. Any treadmill that comes with an incline adds an extra advantage for the fat cutting goal and this one features up to 15% auto incline.
Due to the Orthopedic Belt & the OrthoFlex Suspension System runners will be able to enjoy a much safer & softer ride. Even the running belt surface is on point with 20.5 x 58’’ which helps sprinters of all heights to use it for their training.
The most stunning thing about the 3G Cardio treadmill is its superb non-compromised treadmill with a 350-pound weight capacity.
Moreover, both the assembling & maintenance of the 3G Cardio treadmill is simple & easy. You will experience a quiet training session on this powerful treadmill.
Furthermore, the basic-looking digital monitor of the 3G Cardio treadmill will show you data like running speed, time, calories, heart rate, etc. Sadly it does not come with a tablet holder which is a big downside.
- 8 built-in program & 2 custom program
- 15% auto incline with easy to assemble & maintenance
- Revolutionary level sturdiness with a weight capacity of 350lb
- Orthopedic belt & OrthoFlex Suspension keeps your leg at ease
- Sufficient running space, quiet ride & a top speed of 12 mph
- The digital monitor is cheap looking & basic
- No tablet holder is attached
9. XTERRA Fitness TRX3500 Folding Treadmill
The XTERRA Fitness TRX3500 Folding treadmill is one of the heavy treadmills that comes with fantastic features.
Plus, the 3.0 HP motor of the XTERRA treadmill ensures a top level of 12 mph speed which makes this running machine a great one for high-intensity running.
Besides, it will also bring more fun during training as you will be able to run at 12 different level inclines. This excellent treadmill has 30 preset programs & 2 custom programs to kick off the boredom.
You can easily track all your data just by looking at the 6.5’’ Blue Backlit LCD screen. The solid build alloy steel frame of the XTERRA TRX3500 allow user up to 350lb.
For your convenience, the TRX3500 comes reading rack, cup holder & cooling fan. Unlike many other treadmills, this one offers you Bluetooth connectivity.
In terms of running deck space, the treadmill features a 20 x 60’’ surface which is larger than most of the treadmills available on the market. One of the drawbacks is it lacks stability due to the heavyweight of the front compared to the lighter deck.
A runner with bad knees finds this powerful treadmill knee-friendly as it has an XTRASoft deck cushion which reduces impacts from running. Moreover, for easy folding, it’s packed with Lift Assist & Safe Drop.
Due to the noiseless operation, it would be a great choice if you have little kids in your house as it won’t disrupt their sleep.
- Suitable for high-intensity running
- XTRASoft deck cushion & supports up to 350lb
- Cooling fan, cupholders, 6.5’’ Blue Backlit LCD screen, Bluetooth Connectivity
- 12 different inclines add advantages plus a large size running area
- Noiseless ride, ultra-efficient Lift Assist & Safe Drop
- Stability is not up to the mark
10. Exerpeutic TF900 Electric Treadmill
The last unit on the list is the Exerpeutic TF900 Electric Treadmill which would be one of the best treadmills for a heavy person.
Compact design with a running surface of 36 x 16’’ size & a low top speed of only 4 mph makes it one of the most appropriate treadmills for walking. However, if you need a treadmill where you want to run at high speed then this one is a big no for you.
Plus, you have the access to read speed, time, total distance, calories burned & pulse from the electronic LCD display monitor. The folding system of this treadmill allows you to store it without any hassle.
In addition to that, the Exerpeutic TF900 comes with long arm rails which provides a secure running experience. Thanks to the lightweight design for which you can easily assemble it as well as transport it from one room to another.
Moreover, the built quality is robust & uncompromised which allows users up to 350lbs. Along with that, the stability of the Exerpeutic TF900 is outstanding. Because of the quietness, this powered treadmill would be a desirable buy for users who has little babies inside the home.
Furthermore, it also has a safety key option which you can remove in an emergency & the running machine will be turned off immediately.
Unfortunately, the TF900 tread does not have an incline feature for the user which is a big downside. Having said that, with its good & bad side, it stands out among many because of its fantastic weight capacity.
- Sturdy built plus the extremely high weight of 350lb capacity
- Smooth to assemble & easy to move
- Compact design plus lightweight
- LCD monitor for relevant data
- Quiet motor & perfect for slow walking
- No incline feature for user
- Inappropriate for high intensity due to low speed
What Are the Benefits of Using a Treadmill for a Heavy Person?
All the exercise machines provide some benefits & the treadmill for heavy-weight users is no exception. You will see many benefits after riding on the treadmill for a few days. Let’s see a bunch of those benefits..
Increase Motivation & Mental Health
It’s a very common saying & people know that running or walking would definitely uplift your mood. Which will eventually increase your overall mental health.
A treadmill will let you exercise according to your desire which slowly builds your confidence level that you can change your lifestyle. One of the key players behind good mental health is the release of endorphins in the brain which kicks out the depression & anxiety from your mind.
Does not matter if you start at a slow beginning. Because as long as you can continue with moderate level running & jogging a huge amount of calories will be burned at the end of the month.
The first weight cutting will be pretty fast as they are water weight. By that time you will be filled with more energy & able to give more effort to your workout.
Over the course of only 2-3 months treadmill will help you to lose a significant amount of weight from your body.
Increase the cardiovascular fitness
Improvement of heart health is a top-notch benefit when a heavy person uses it regularly. Running is one of the best forms of aerobic workout so running on a treadmill with an incline will help you to increase the intensity of your workout. Which multiplies your calorie-burning plus blood circulation.
More circulation will lead to more receiving of oxygen and an increase in overall heart health. Not only that, a heavyweight person with high blood pressure will see a constant drop in blood pressure along with the pounds.
The chance of skipping your workout is low
Due to extremely hot weather, cold weather, or even rainy weather many of us does not feel like going outside for walking & running. In that case, an indoor treadmill works as the best option.
You won’t lose your spirit easily as the running machine is in front of your eyes. So the chances of the inconsistency of the workout are low. Which ultimately aids in getting fit faster.
Less impactful running
Even if a treadmill does not offer you any shock absorption system you will it less hard than the asphalt rock surface or concrete running track.
Moreover, a large number of treadmills are now packed with shock absorbers so running on a treadmill will prevent any types of knees, joints & leg injury.
Tone body muscles
Running & walking requires support from your calves, glutes, thigh muscles. The more a heavy person will push the more lean muscle will they grow along with the cutting of wibbly fat?
Are Treadmills Bad for a 350 lbs person?
It’s hard to say whether or not that treadmills are bad for a 350lb person . Because it will depend on how the user is using their treadmill & what types of treadmill they are using.
First of all, the treadmill gives a heavyweight person the chance to start with very slow walking. Which is not bad for their knees, joints, or likewise muscles.
The second thing, it allows a softer approach to running as treadmills are equipped with belts. So much better running experience on the rocky surface of the road.
Being said that, if a heavyweight person starts workout carefully and carries on then there would be little or no pain using the treadmill. On the contrary, a more aggressive plus high-intensity style workout will impact badly.
How to start using a treadmill if you’re overweight or obese?
We have already gone close to this topic however let me tell you the appropriate way to start using the treadmill if you are overweight or obese person.
Right after getting on your treadmill, make up your mind to hit the goal to cut all the belly fat which just became an extra burden and makes your life more difficult.
Slow starts will help you hit the goal with a faster ending. The main focus should be slow-growing in terms of the intensity of running.
An obese person always has a chance to fall into knee injury from training & losing motivation. So to keep the wheel under your control you need to move slowly & gradually over a 6months period.
In short, for the first month just keep walking & walking. Get your body used to walking. From the next month add slight jogging with walking. If you feel confident enough then you can go for an incline walk on your treadmill. But if you think it’s not the right time & feel any sharp pain then ignore the incline walk.
From the middle of the 3rd month, you can continue running along with walking & jogging. Don’t rush, take your time & don’t be too hard on yourself.
The Best Way to Use a Treadmill for Overweight People
When it comes to exercise for overweight people on the treadmill, you need to take a lot of things into consideration before jumping on the treadmill.
Slow beginning fat burner
- Walk at 2mph for (8-10 minutes)
- Jog at 4 mph for (1 minute)
- Walk with a speed of 2 mph ( 5 minutes)
- Jog at 5 mph for ( ½ minute)
- Walk at 2 mph for the next ( 7 minutes)
- Jog at 5 mph for the last (1 minute)
Quick fat burner
Please keep this mind that this specific workout plan should be done after getting used to the slow beginning fat burner plan for at least 4 weeks.
- 4mph jogging for (3 minutes)
- 6mph run for (1 minute)
- 2mph walking for ( 2 minutes)
- 8 mph running for next ( 2 minutes)
- 2 mph walking for (1 minute)
- 4 mph jogging for (2 minutes)
- 2 mph for the last (3 minutes)
Incline walk plus flat jogging
When you have done the quick fat burner plan for at least 2 weeks then you can go for this plan.
- 2mph flat walking for (5 minutes)
- 6mph flat jogging for (3 minutes)
- 3 mph speedy walk at 10% incline ( 3 minutes)
- 1 mph slow walk at 10% incline ( 3 minutes)
- 6 mph flat jogging for next ( 2 minutes)
- 3 mph speedy walk for ( 3 minutes)
- 2 mph slow walk for last (3 minutes
You need to keep your eyes open while going to buy your new treadmill. As you are going to buy a treadmill that can take heavy users so some specific features have to be installed in the treadmill.
Let’s see what those features are…
Powerful Motor & Speed
The treadmill is all about speed, isn’t it? And to get a medium to high speed it’s a must-have powerful motor that can keep the tread belt rotating without any lagging.
At least a 2 HP motor with a top speed ranging 8-12 mph would be okay for heavyweight runners. You must ensure the motor power & speed is not less than or it won’t benefit you much in losing weight.
Easy to assemble, move & control
People often think that treadmills that support heavy users are tough to assemble, move. In reality, it’s not always the case. It’s undeniable that the treadmill for the heavy user is itself heavy but some come with top-notch transport wheels & SoftDrop system which helps for easy moving, folding & store.
Speaking of controlling, an ample size quick speed/ incline button with easy to operate console are preferable as it’s great value during a workout.
One of the important features of a high-end treadmill is the incline feature as it helps you to run in an uphill position. Incline level increases the overall workout toughness & burns more calories.
In addition to that, it also helps to build the lean muscle of the legs. Treadmills with an incline level of 10-15% would be perfect for heavyweight runners.
Sturdy Build with 350lb capacity
This is the most important feature among all & without it your full purchase would be a total waste. Have a check before purchasing the treadmill that it has an ultra-robust thick frame that has a weight capacity of 350lb per user.
Shock absorption capacity
Not all treadmill is gifted with this feature however, it’s a key feature to save your knees & joints from the harsh impact of running.
Heavyweight people naturally have problems like knee pain, ankle pain, calf muscle pain, and even heel pain. So a treadmill that does not have a good cushioning deck will only accelerate those pain after a workout.
Anyway, you are going to spend hundreds of dollars so make sure it has this feature.
Sufficient running surface
If you are an average person or tall person then it’s just that you buy a 20 x 60’’ running surface because that would be perfect for running. However, if you are a short person then you can think of going for a treadmill that comes with a minimum 16 x 36’’ size running deck.
Ensure your treadmill has handrails that are sturdy and long enough to provide support. Not only that, look for the textured rails that save you from slipping off the treadmill.
A heart chest strap with a pulse sensor is crucial to keep your heart rate in check. Finally, an emergency removable clip or key for the immediate stop is also important.
1. Why should obese people use treadmills?
Obese people should use treadmills because it’s more safe & comfortable to run on a treadmill than outside. And it helps the obese person to cut a huge amount of extra fats.
2. Is the elliptical better than the treadmill for obese people?
The elliptical is better for the obese in terms of lesser impact on the knees. But the pattern of the elliptical is a bit more intense than the treadmill. So treadmill would be best for obese people to start with. But if you want to have both machines in one machine, you can read my article on the best elliptical treadmill combo.
3. Do Heavy People Have to Run on a Treadmill?
The ultimate goal is to run but not at the beginning of the workout. Because of lack of energy, less tone muscle, low heart health, excessive weight on knees and joints. After walking & jogging for one to 2 months when the weight reduce then the heavy people should start running.
4. What are things a 350lb person should do before running on a treadmill?
It’s important for all runners , including heavyweight 350lb people to be sufficiently hydrated, relaxed before getting on to the treadmill. Part of the plan for the best outcome of quality night sleep is just before the training day.
5. What features should we look for when buying a treadmill that holds 350lbs?
350lb is a massive weight to deal with so while buying a treadmill for such user weight you must look for features like a rock-solid build with 350 lb capacity, shock-absorbing deck, ample amount running surface, safety handrails, powerful motor & easy to fold plus shift treadmill.
6. Are treadmills with 350 lb capacity too heavy?
Most of the 350lb capacity treadmill would be heavier than an average treadmill as it has to be robustly built with thick steel or metal frame.
7. Which treadmill is the best treadmill for a 350lbs user?
In my opinion, the Nautilus Treadmill Series T618 is the best treadmill for a 350lbs user. However, the OMA 6134EAI, Bowflex T7, NordicTrack Commercial 1750 & IN10CT Health Runner Curved Manual treadmill is also a top-class treadmill.
Heavy users have to lose weight to get back on the right track in life. If an unhealthy lifestyle continues it only gets worse.
And a high-performance solid treadmill can change the game & help you become fit again. So make the deal & bring back the lost energy.
I expect that from the aforementioned list you would be able to pick the best treadmill for 350lb.