HealthPostures 5100 Black Stance Angle Sit-Stand Ergonomic Chair

$1,999.00 $1,750.00

HealthPostures 5100 Black Stance Angle Sit-Stand Ergonomic Chair The 5100 Stance Angle Sit-Stand Chair is the only ergonomic sit-stand chair in the world that...

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HealthPostures 5100 Black Stance Angle Sit-Stand Ergonomic Chair

The 5100 Stance Angle Sit-Stand Chair is the only ergonomic sit-stand chair in the world that allows you to move effortlessly and comfortably throughout the day while you change positions with your standing desk. Movement and proper ergonomic support are the keys to minimizing poor posture and lower back stress that lead to spinal deformity caused by most ergonomic task chairs.

With a contoured backrest, two adjustable armrests, and angled footrest, the Stance Angle Sit-Stand Chair for standing desks will keep you comfortable all day. This modern ergonomic sit-stand chair will cradle you as you work at your desk, revealing a multitude of positions such as sitting, kneeling, and assisted standing. This is all accomplished by the adjustable leg cushions and the double trigger mechanism that allows the standing desk chair to move vertically as well as at an angle, all with very little effort.  No sit-to-stand workstation is complete without a proper ergonomic standing chair to support your body posture throughout the day. 


  • Move from sitting to assisted standing with an easy double trigger system
  • Contoured backrest and adjustable armrests for optimum ergonomics
  • Easy and smooth adjustment. The foot and knee pad moves forward and back. The seat moves up and down with separate lever for moving armrests
  • Precisely angled footrest with adjustable leg cushions cradles the body
  • 4 large, 3" industrial grade swivel casters for easy moving
  • Precisely angled footrest for long-standing ergonomics
  • Steel frame with a powder coat paint finish
  • Robust steel construction on the only sit-stand chair of its kind
  • Weight Capacity: 270 lbs
  • Armrest Adjustment: 4.5"
  • Leg Cushion Range: 12"
  • Seat Size: 20.5”W x 18.5”D
  • Seat Height Range: 20” – 25”
  • Arms Range from Floor: 25.5" - 34"
  • Distance Between Armrests: 23.25”
  • Backrest Dimensions: 20.5”W x 17.5”H
  • Knee Pad Dimensions: 18”W x 8.5”H
  • Base Dimensions: 23”W x 40”D (minimum spaced required)
  • Total Unit Weight: 85 lbs
  • 5-year manufacturer's warranty
  • Shipped mostly assembled
  • Proudly made in the USA!

Price Match & Warranty

At Upmost Office, we work very hard to ensure that we offer the absolute best prices online.  If you find another online store that offers a lower price then us within 30 days of your purchase date please let us know and we will refund your original payment for the difference.  We want you to feel confident that you are getting the absolute best price for the product you are ordering.  If you find that our own website has a lower price for the same item you have ordered within 30 days of your purchase date will refund the difference as well.

To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within 30 days from the date of your order and we will process the credit accordingly.

Our 100% Price Guarantee has some reasonable limitations:

  • - You must purchase the item from our website before requesting your Price Match Guarantee
  • - Promotions such as rebates and buy one, get one free offers, discounts, coupons are not eligible
  • - The item must be in stock on the competitors website
  • - The retailer must be an online store, they may not have a retail location
  • - The website cannot be a discounter, wholesale marketplace, or auction website (ie; Amazon, eBay, Overstock, etc..)
  • - The retailer must be an Authorized Retailer of the product in question
  • - The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax

Returns & Warranty

Regarding Returns and Warranty, go to this page for more details:

Free Shipping

Free Shipping

We proudly offer free shipping to our beloved customers on most orders over $199. If your order amount is below $199, there will be a small shipping charge calculated at checkout to offset our cost in transporting your purchase to your door in a timely fashion. In order to save on shipping, we advise you to add other accessory or complimentary items to get your total purchase amount over $199. You may also choose to enter any coupon code from our promotions during checkout to offset any shipping charges.

Order Confirmation

As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment. If your item is on back order or unavailable, we will void the pre-authorization and reach out to you via e-mail. If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

NOTE: Eureka Ergonomic's logistic team is located in the Far East, any Eureka's orders may take up to 24 to 48 hours to get processed. Please keep this in mind when you order any Eureka Ergonomic products.

Order Shipment

If your order is stock and we process the charges to your credit card, it will normally ship within 1 to 3 business days from the date of your order. We will send you tracking information within 24 to 48 hours of your order leaving the warehouse to the e-mail address you provided when checking out. Shipping time with free shipping is normally 3 to 5 business days within the contiguous 48 US states. If you do not receive tracking information from us within 5 business days of your order, feel free to follow up with us by emailing to


Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it when signing for delivery. If your item(s) do arrive damaged, please email photos to with "Return" and your order number in the email subject line and we will process an insurance claim on your behalf.