Orthopedic Chairs
In this wild and fully functional collection of orthopedic chairs, you will feel like whatever you need may be, at least you can sit in style. In stand-alone and sturdy options, and some more eclectic offerings, you will feel very comfortable in these orthopedic chairs. Take a long look at the collection of orthopedic chairs and pick one out for yourself.
Modern Ergonomic Office Chair with Adjustable Armrests
$164.99 $289.99
Modern Ergonomic Office Chair with Adjustable Armrests
Inbox Zero
$164.99 $289.99
Perfect For: Enhancing comfort and efficiency in home offices
What We Like: Highly elastic and breathable backrest
This modern ergonomic office chair is designed to provide excellent support and comfort while working. It features adjustable armrests to save space, a highly elastic and breathable backrest, and a cushioned seat for all-day support. The chair comes in sleek black and white colors, making it easy to blend with various decoration styles. The locking back function allows for relaxation during breaks, while the 360-degree swivel makes it easy to maneuver around your workspace. This chair is suitable for a wide range of users, accommodating weights up to 250lb and different table heights.
Designer Advice:
Pair this chair with an adjustable-height desk for maximum comfort and efficiency, as well as a matching color scheme for a cohesive and professional look in your workspace.
Classic Executive Chair with Flip-Up Armrests
$146.99 $209.99
Classic Executive Chair with Flip-Up Armrests
The Twillery Co.®
$146.99 $209.99
Perfect For: Studying, gaming, and completing WFH projects
What We Like: Ergonomic design with adjustable height and tilt
This classic executive chair features a padded headrest and lumbar support, enhancing comfort during long hours of work, study, or gaming sessions. Designed with an ergonomic S-shape waterfall design, it offers optimal neck and lumbar support for better posture. Its faux-bonded leather and foam filling provide cushioned support for up to eight hours. The chair has flip-up armrests, adjustable height and tilt, and a 360-degree swivel design. Additionally, the antimicrobial feature keeps you protected from germs. The chair withstands up to 250 pounds of weight.
Designer Advice:
To optimize comfort, adjust the chair's height and tilt according to your preferences, and pair it with an ergonomically designed desk, keeping your monitor at eye level to prevent neck strain.
Adjustable Ergonomic Office Chair
$116.99 $129.99
Adjustable Ergonomic Office Chair
Inbox Zero
$116.99 $129.99
Perfect For: Enhancing comfort and productivity in any office space
What We Like: Customizable design for tailored support
This adjustable ergonomic office chair ensures the best balance between you and your chair by offering a variety of fine-tuning functions. Its backrest mimics the human spine, providing excellent support for your neck and back, promoting the correct sitting posture, and reducing pressure & pain. With independently adjustable headrests, lumbar support, armrests, and cushions, you can personalize the height settings to suit your body type. The breathable mesh design and high-density sponge cushion ensure comfort, while the silent casters and metal base ensure safety and stability without damaging your floors.
Designer Advice:
Regularly adjust the chair's settings to find the perfect combination of support and comfort, and take breaks every hour to stretch and maintain good posture throughout your workday.
Ergonomic Task Chair with Lumbar Support
$209.99 $199.99
Ergonomic Task Chair with Lumbar Support
Wade Logan®
$209.99 $199.99
Perfect For: Enhancing comfort and productivity in your office or workspace
What We Like: Customizable and versatile comfort features
This ergonomic task chair boasts a wealth of features to improve your sitting experience, including an adjustable seat height, 3 lock-in recline options up to 135° tilt, and adjustable lumbar support. Its highly breathable, self-supporting mesh composite offers year-round ventilation while adhering to BIFMA standards with a 120,000-cycle test. The curved back is designed to align your body for ultimate comfort, while the 360° swivel and five double caster wheels allow you to move freely on various floor surfaces.
Designer Advice:
Invest in this ergonomic chair to reduce the risk of back and neck pain, and enhance your productivity by creating a comfortable working environment. Remember to take breaks and stretch regularly for added benefits.
Ergonomic High-Back Office Chair with Adjustable Features
$177.99 $349.99
Ergonomic High-Back Office Chair with Adjustable Features
Inbox Zero
$177.99 $349.99
Perfect For: Prolonged hours of comfortable work at a desk
What We Like: Unique S-shaped backrest and thicker foam cushion
Upgrade your office seating experience with this ergonomically designed high-back chair, boasting an S-shaped structured backrest and adjustable butterfly support to relieve back fatigue and pain. The chair's high-density foam cushion is 5 cm thicker than the average seat, ensuring breathable comfort even after sitting for extended periods. The adjustable 3D armrests and 360-degree swivel offer personalized positioning, while the safe and sturdy nylon base features PU material casters for smooth movement.
Designer Advice:
Pair this office chair with a height-adjustable desk to further optimize your posture and workspace ergonomics, reducing the risk of developing muscular strain or discomfort.
Reclining Gaming Chair with Massaging Lumbar Pillow
$206.5 $232.65
Reclining Gaming Chair with Massaging Lumbar Pillow
Flash Furniture
$206.5 $232.65
Perfect For: Gamers seeking ultimate comfort and style during long gaming sessions
What We Like: Adjustable reclining feature with a massaging lumbar pillow
Experience exceptional comfort with this reclining gaming chair, featuring a striking black and gray upholstery, thick padding, and removable massaging lumbar support. Adjust the recline between 95° ~ 175° to find your perfect position as you game, work, or relax. The slide-out footrest and 360-degree swivel function add to its ergonomic design, making it ideal for gaming enthusiasts, office workers, or anyone in need of a versatile, comfortable chair.
Designer Advice:
Pair this gaming chair with a sleek black desk featuring built-in headphone hooks, cup holders, and cable management for the ultimate gaming and workspace setup. Opt for a solvent-based cleaner to tackle any spills effortlessly.
Multifunctional Reclining Gaming Chair with Massage
$249.99 $379.99
Multifunctional Reclining Gaming Chair with Massage
The Twillery Co.®
$249.99 $379.99
Perfect For: Ultimate gaming and relaxation experiences
What We Like: Integrated electric massager and adjustable features
Experience gaming like never before with this multifunctional reclining chair that boasts an electric massager and several adjustable settings. The chair features a sleek chevron-patterned faux leather, a metal frame, and a 360° swiveling base. Not only is it height-adjustable but the backrest can tilt between 90° and 140°, catering to your specific needs. It's thoughtfully designed with a removable headrest, lumbar support, a side pocket for the remote, and even a cup holder.
Designer Advice:
Place this gaming chair in a dedicated gaming space or add it to your living room for versatile comfort. Adjust your chair setup to fit your preferences and enjoy long gameplay sessions with ease.
Ergonomic Gaming Chair with Retractable Footrest
$99.99 $159.98
Ergonomic Gaming Chair with Retractable Footrest
AJHH
$99.99 $159.98
Perfect For: Home office and gaming sessions
What We Like: The ultra-breathable mesh and ergonomic lumbar support
This sleek ergonomic gaming chair is designed to make those long hours at your desk very comfortable. Premium new-tech mesh ensures fresh airflow and decreases heat and moisture build-up, while the ergonomic high backrest naturally fits your spine and can be adjusted from 90° to 135°. The chair also features adjustable armrests, high-density memory foam cushion, and 360° smooth casters for easy movement. A retractable footrest provides added relaxation during breaks.
Designer Advice:
Place this chair in a home office or gaming room, and pair it with a spacious desk to create the ultimate workstation or gaming setup. Make sure the height is adjusted correctly for better posture and productivity.
Ergonomic Task Chair with Vertical Mesh Back
$409.99 $975
Ergonomic Task Chair with Vertical Mesh Back
Inbox Zero
$409.99 $975
Perfect For: Enhancing comfort and professionalism in any office space
What We Like: Breathable mesh back and user-friendly adjustable features
Upgrade your daily work routine with this ergonomic task chair, featuring a breathable vertical mesh back for ultimate relaxation and motivation. The polished base and dual-wheel carpet casters ensure easy mobility, while adjustable features including one-touch pneumatic seat height adjustment and 2-to-1 synchro tilt control with a 3-position lock cater to your specific needs. With an affordable price and sleek design, this chair is the ideal addition to any office environment.
Designer Advice:
Pair this task chair with an adjustable standing desk to promote a healthy and dynamic workspace, enabling you to comfortably switch between sitting and standing positions throughout the day.
Ergonomic Dual-Backrest Gaming Office Chair
$187.31 $369
Ergonomic Dual-Backrest Gaming Office Chair
Eureka Ergonomic
$187.31 $369
Perfect For: Home office workers and esports gamers seeking comfort and support
What We Like: S-shaped dual-backrest with ergonomic lumbar support
This high-quality ergonomic gaming office chair features a breathable mesh S-shaped dual-backrest designed to fit the curve of the human body and maintain a healthy spine radian. With multifunctional adjustments such as 2D headrest, 3D armrests, and a height-adjustable seat, this chair readily conforms to your unique shape. Enjoy smooth tilt adjustability with a 90-135° recline range and lockable positions for added comfort. A thick seat cushion and sturdy, BIFMA-certified materials ensure lasting durability and support for up to 299lbs.
Designer Advice:
Maximize the chair's benefits by adjusting all its customizable features to fit your body, ensuring proper posture and comfort during long work or gaming sessions.
Ergonomic Office Chair with Advanced Comfort
$320.76 $429.99
Ergonomic Office Chair with Advanced Comfort
La-Z-Boy
$320.76 $429.99
Perfect For: Enhancing productivity and comfort during long work hours
What We Like: Expertly designed cushioning system
This ergonomic office chair offers an unparalleled sitting experience, featuring an advanced cushioning layer system for ultimate comfort. La-Z-Boy's years of furniture experience and industry accolades assure you a high-quality and supportive chair. With its sleek design incorporating soft curves and metal accents, the chair is both stylish and functional. It includes easy adjustability for height, tilt, and lift, ensuring optimal body alignment. This chair also has five wheels and industrial-grade components for easy movement and durability.
Designer Advice:
Pair it with an adjustable sit-stand desk and a supportive footrest to create a versatile and ergonomic workspace that encourages better posture and overall well-being.
Billups Ergonomic Mesh Desk Chair
$153.99 $572
Billups Ergonomic Mesh Desk Chair
Ebern Designs
$153.99 $572
Leather chairs are fine, but if you sit for hours on end, they can get a little sweaty. Mesh on the other hand is breathable and gives plenty of airflow to your back and rib area. You will have no sweaty stains and strange wrinkles on your shirt or suit jacket when you sit on one of these tasteful mesh backed chairs.
This model is adjustable three ways, and even allows you to raise the back two full inches. It comes in 10 colors, many of them vibrant, and offers lumbar support, which you will feel right away as your back strain melts away. And if that wasn’t enough, it features a tilt-lock mechanism so you don’t lean back too far.
What we like:
● 10 colors
● Lumber support
● Three adjustment modes
● Full 360-degree swivel
What we don’t like:
● Armrests cheaply made
Polyurethane Task Chair
$139.99 $199.99
Polyurethane Task Chair
Inbox Zero
$139.99 $199.99
For something a little different, this ergonomic chair has all the features you love, with an additional sturdiness and overall dexterity you will appreciate over a long period of use. The seat is overstuffed for comfort, while the back, complete with lumbar support, is mesh, breathable, and cool over time.
It is lower to the ground giving it additional stability, and the base is wide with five hardened castors. Behind the mesh lower backing you will find adjustable lumbar support hands, and below a tilt lock mechanism. Feel free to lean back in this chair without fear of toppling. And it is lighter than most steel models.
What we like:
● Sturdy design
● Lighter than steel
● Adjustable lumber support
● Comes in black and white
What we don’t like:
● Cheap seat cushion
Ergonomic Office Chair with Lumbar Support
Ergonomic Office Chair with Lumbar Support
Inbox Zero
Perfect For: Long hours of comfortable work
What We Like: The 3-degree curved seat and adaptable height adjustments
An ergonomic office chair designed for lasting comfort, featuring a backrest that supports the spine's natural curve and a seat with a 3-degree curve that accommodates the human body. The thick, breathable padded seat keeps you cool and provides resilient support. Its multi-function mechanism ensures effortless seat height adjustment and rocking control, while the smooth, durable PU casters provide excellent mobility on various floor surfaces. This chair supports up to 250 lbs, making it suitable for different body types and work environments.
Designer Advice:
To create the perfect workspace, pair this chair with an adjustable height desk and ensure adequate lighting to minimize eye strain and fatigue.
Ergonomic Breathable Mesh Office Chair
Ergonomic Breathable Mesh Office Chair
Inbox Zero
Perfect For: Home and corporate offices, conference rooms, and receptions
What We Like: Excellent lumbar support and customizable comfort
This ergonomic office chair features high-quality breathable polyester mesh for the backrest and headrest to keep you cool and comfortable. Its superior lumbar support promotes a healthy spinal posture, while the thick seat relieves pressure on your hips. The adjustable backrest and flip-up padded arms enable customized comfort, while the heavy-duty base supports up to 250 pounds. A tilt function lets you lean back and relax when you need a break.
Designer Advice:
For enhanced ergonomics, pair this chair with an adjustable-height desk to maintain proper posture and prevent strain during long hours of work or gaming.
Swivel Study Chair with Flip-Up Arms
Swivel Study Chair with Flip-Up Arms
Inbox Zero
Perfect For: Comfortable and ergonomic workspaces
What We Like: Exceptional neck and lumbar support
Upgrade your workstation with this Swivel Study Chair designed for ultimate comfort and ergonomics. Its adjustable height and flip-up arms make it easy to tailor the chair to your needs, preventing muscle stiffness, back pains, and discomfort. This cool, sturdy, and distinctive executive chair offers a double-padded seat and headrest for extra softness, making it ideal for long working hours. A perfect birthday or Christmas gift for your loved ones, this chair enhances both functionality and aesthetics in any office space.
Designer Advice:
Choose this chair to reduce strain on your back and neck during long periods of sitting, and pair it with an ergonomically designed desk for a complete workstation makeover.
Ergonomic Office Chair
Ergonomic Office Chair
The first thing we all look for in an office chair is the adjustability and the back support. This chair features lumbar support that cradles your back perfectly, adhering to your natural curve. But the second thing people look for is neck support, and in that, this chair is amazing. It has a headrest that doubles as a supportive neck cradle.
The padded seat is thick and soft, filled with memory foam, and the armrests are made of hardened plastic and are completely adjustable. The back is mesh to keep you from sweating through your shirt, and it has the traditional 360 degree of swivel. All of this set on five large castors for ease of movement.
What we like:
● Adjustable armrests
● Headrest/neck support
● Thick padded seat
What we don’t like:
● Only in black
Aloura Ergonomic Task Chair
Aloura Ergonomic Task Chair
Latitude Run®
A high-back desk chair, this model features a curved design that allows it to conform to your body. The back is all mesh and composed of three individual pieces. The headrest is ready to cradle your head and neck, the upper back will support your shoulders, and the lower back is perfect for keeping your lumber area relaxed with just the right tension.
The padded seat is not too soft, but just right for keeping the blood flow to your legs on course, with a dip at the front to natural conform to your hips and thighs. It comes with two hardened plastic armrests that are easily adjustable. And to round it all out, the base and piston shaft are polished steel for a very modern look
What we like:
● Three-piece back
● Adjustable headrest and armrests
● Polished steel base
What we don’t like:
● Recline feature unsafe
Pu Leather Office Chair
Pu Leather Office Chair
17 Stories
Just because it is ergonomic, doesn’t mean it can’t be stylish. This leather option for your ergonomic office chair is all about style and class. It is the best of both worlds, carrying a vintage appearance with some very modern features. Two of those features being a very soft lumbar support and tilting back option.
The armrests are steel with padded top to match the leather of the chair body, it has a tilt lock to prevent accidents, and the seat is extra-padded. One of its most useful features if you are more than the average person is a weight capacity of 400 lbs. This is more than most other ergonomic options.
What we like:
● Support 400 lbs.
● Quality leather
● Tilt lock
● Back tilt
What we don’t like:
● To narrow for larger users
● Unstable when bending
Buying Guide
Chloe is a highly-regarded expert in all things vintage and antique. She’s excited to share her vast knowledge with readers and clients wishing to infuse their homes with a mixture of old-time warmth and modern comfort. In addition to her design work, Chloe regularly volunteers at her local community center, teaching DIY projects to adults and kids.
Orthopedic furniture is designed to help relieve stress on the skeletal structure, to encourage good posture, and even to encourage increased productivity. They range from cushions that can be added to a standard desk chair to automated reclining chairs that can include assistance with sitting and standing. There are even orthopedic dog couches for your canine best friend – yes, that really is a thing. Orthopedic dog couches or beds for the old dog that has been your faithful companion, but now is becoming afflicted with the aches and pains of age.
Kneeling Chairs
Kneeling chairs encourage putting more of one’s weight on shins and thighs, with less on buttocks. They also encourage correct posture. Reviewers say that these chairs take a little getting used to as you will be using more of your core muscles in this position, but that they are great for relieving stress and lower back pain. Because you will not have back support, they tend to help fend off the urge to become so relaxed that you are sleeping at your desk.
Recliners
If you need to get the weight off your lower parts completely, a recliner can help you transfer it to your back. This is an especially good position for someone who needs to place feet at or above heart level for a good portion of the day. Some of the motorized orthopedic recliners are set up to assist the user with getting into and out of the chair, placing minimal strain on the lower back because the chair will gently sit down with your or stand you back up on your feet. Some of them come with a desk unit that has a handle that can act as a cane for stability.
Gravity chairs, or bungee chairs as they are sometimes called, are also a good choice for lower back pain relief. The chair design does most of the work of getting up or down, and – when reclined – they can boost heels above head.
Cushions
If you simply need to get the weight off your coccyx, a cushion could be the answer. Sometimes referred to as a “donut” because the earliest models were a pillow with a hole in the middle, these cushions can be a relief for the pain caused by sitting for extended lengths of time. They support hips and thighs while allowing the central area to be free from pressure.
Orthopedic Chairs for Human’s Best Friend
While dogs do not have the burden of walking upright, they can become arthritic and some of the larger breeds are prone to hip dysplasia. Getting up off a surface – no matter how comfortable – can become a problem, as can finding a comfortable resting position. An orthopedic dog couch is high enough off the floor to keep it free from drafts and to allow your friend to get down, rather than up when he or she wants to move. A soft, rollback can give a place to rest a chin.
If you and your canine best friend are having trouble with seating, there are orthopedic choices available for you both.
Does a day in the office feel like torture because you have to deal with neck pain or sciatic pain thanks to your desk job? Have you tried exploring standing desks and office chairs, but all to no avail? Well, if this is you right now, take a deep breath and relax because a kneeling chair could be the best reply to those pains that reduce your work efficiency.
Kneeling chairs help to put your entire back at ease because and to maintain a natural curve in your lower back - to remove the pressure. In this article, you'll learn more about the different types, what to consider before you buy one, and frequently asked questions that'll make your quest easy.
In reality, you can't just go for any kneeling chair that appeals to you. It has to give you the required ease you need while you work. So, we outlined the major types of kneeling chairs to provide you with a head start:
Kneeler Chair with Back Support
This kneeling chair comes with a backrest as an optional accessory or built-in mechanism. It's quite useful for people that intend to spend a lot of time in their kneeling chair - but take short breaks to maintain the default upright position. This model is perfect for those that have a medical condition.
Double Knee Pad Chairs
The double knee pad chair looks like a rocker with separate pads for each knee. With its design, your hips, thighs, and legs will be at an optimal angle with minimal effort because it forces your thigh to open up. The only snag about this chair is that it restricts your thigh angles. But, if you don't mind, you can put a foot on the knee pad to change things up from time to time.
Sit-Stand Kneeling Chair
It's a combination of a kneeling chair and standing leaning chair. So, it allows an entire range of posture like kneeling, standing, and sitting. You can even get a lot of health benefits from this chair if you use it properly.
X-frame Kneeling Chair
As the name suggests, the chair has an x-frame that enhances structural stability. It usually comes with wheels to improve mobility. It's a perfect go-to if you want a simple kneeling chair that's cost-effective and easily adjustable.
Single Knee Pad Chair
The single knee pad chair comes with one-piece knee support that's thickly padded to support your knees. The design is perfect for people that like to adjust their sitting posture continually. An advantage of using this type of kneeling chair is that it allows for varied thigh angles as you sit, from closed to open.
Saddle Kneeling Chair
This kneeling chair comes with a saddle-shaped seat pad. The curved seat design helps to improve the posture in the cervical and lumbopelvic region. In other words, you'll have reduced neck and back pain with this chair. Thanks to its divided saddle seat, it works well for men who want to reduce perineal pressure.
Rocking Kneeling Chair
The rocking kneeling chair comes with a forward sloping seat and curved frame. The design allows gentle rocking - especially when you lean backward. Since the chair introduces constant movements as you sit, it will help to reduce back pain. The snag with this chair is that it isn't height adjustable - so, not everyone can benefit from the furniture.
A backrest seems like the best way to maintain a good posture while you work. But, with kneeling chairs, this feature isn't necessary because it puts you in the perfect position without the backrest.
If you feel that you'll need to lean back occasionally, you can go for a kneeling chair with backrest - especially if you have a medical condition. But if you don't, we suggest that you take regular breaks from sitting on any chair.
This way, your postural muscles will rest. In other words, if you need to stretch or lean back, stand up instead.
When you go hunting for an excellent kneeling chair, you have to consider the following factors:
- Balancing Ability
When it comes to balancing on a kneeling chair, we have two basic styles: rockers and coasters. It's always best to consider one that rocks. A rocking kneeling chair doesn't stop at engaging your core. It also helps you stretch out your lower back.
There's more.
The rocking chair helps keep your mind quiet and focused throughout the day. No doubt, you can't customize its height and angles, but it adds motion to your workday. When you go shopping, you'll notice that some models appear to rock, but the bottoms are flat.
This model isn't the ideal rocking chair because it doesn't give you the freedom to move. So, it's best to buy the proper rocking kneeling chair - which is the model that looks like it's supporting itself with its legs alongside knee pads that serve as stoppers and weight bearers.
If you prefer a more static option while you work, the coaster kneeling chair is the way to go. Plus, it moves across the floor with ease compared to the rocker option.
- Knee Pad Angle
The knee pad angle is one of the most important features you should look for in a kneeling chair.
Why?
It's because the whole idea behind creating a kneeling chair was to offer you a different option of sitting. Ideally, a kneeling chair should allow you to open up your hips and adjust your posture from your lumbar spine up.
What's the logic behind the chair?
The logic behind this furniture is that when you tilt your pelvis forward and open your hips from your front body, you're allowing your lower spine to curve in naturally. This posture helps to eliminate the C-shape that forms when we sit in a regular chair.
It's essential to avoid kneeling chairs that have kneeling pads without angles. Instead, you should consider going for kneeling chairs that have seats between 120^o^ and 130^o^ compared to the flat 90^o^ of regular chairs.
- Distance Between Seat and Knee Pad
If you'll be the only person making use of the kneeling chair, it's crucial to get one relative to your body size. For instance, if you get a non-adjustable chair and your height is about 6"4" - the purpose is defeated.
The reason is that the non-adjustable chairs usually have enough wiggle room for people between 5"2"-6"2". In this case, you have to go for a kneeling chair that will allow for both seat angle and height adjustment - to avoid back and sciatic issues in the future.
When is it ideal to use kneeling chairs?
It's ideal to use a kneeling chair when you have short-term tasks that require forward reach.
What's the best way to use a kneeling chair?
You should start by sitting in your kneeling chair before you proceed to the kneeling position. This method takes the bulk of your weight to your bottom - while the knee pad supports your shins and knees.
Are kneeling stools easy to assemble?
The kneeling stools come with fewer parts compared to the traditional office chair. And it takes under thirty minutes to assemble the furniture fully.
Is the kneeling chair good for the hips?
Yes, it is. A kneeling chair helps your hips slide forward. When this happens, your weight gets evenly distributed. Consequently, your neck, back, and shoulders align - which means there'll be less stress on your lower back and no spinal compression.
How does the kneeling chair help sciatica?
The kneeling chair helps with sciatica by supporting your upper body on your buttocks. It also takes some support from the lower part of your leg - which increases the surface area in contact with the chair. That way, it reduces pressure on your back legs as you sit and relieves the strain on your sciatic nerve.
Are kneeling chairs terrible for the knees?
Since kneeling chairs confine your legs to one position, it tends to slow circulation to your legs and increase pressure under your kneecaps. So, it could be terrible for your knees if you're particularly tall or you sit for a long time.
Are kneeling chairs a good idea if you experience coccyx pain?
The kneeling chair helps you tilt your pelvis forward, but it puts some pressure on your coccyx. The good news: some kneeling chair options come with a coccyx relief cut out section, which reduces the pressure on your coccyx.
Can you get shin pain from using a kneeling chair?
Well, shin pain is possible - especially when you're not used to a kneeling chair. A rule of thumb is to start slow at first - maybe 20 minutes, and increase it over time when you're more comfortable. Your old chair should be close by as well to switch with ease for comfort.
Kneeling chairs are great for relieving you from a great deal of back pain. But there're certain precautions you should take: approach it patiently, use it short-term, and ensure that everything you need is within your reach before you sit.
